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02069-DSH-001-D mindspeed technologies? march 2004 mindspeed proprietary and confidential m02069 3.3 or 5 volt vcsel/fp laser driver ic for applications to 4.3 gbps applications ? epon ftth modules gigabit ethernet modules 1g/2g/4g fibre channel modules digital video the m02069 is a highly integrated, programmable vcsel driver intended for sfp/sff modules to 4.3 gbps. using differential pecl data inputs, the m02069 supplies the bias and modulation current required to drive a vcsel or edge-emitting laser. the modulation output can be ac or dc-coupled to a fp laser diode or ac coupled to a com- mon anode or common cathode vcsel peaking adjustment is available to improve vcsel fall time. epon burst mode operation is supported with no extra components. integrated safety circuitry detects faults and provides latched bias and modulation current shutdown. functional block diagram features high speed operation; suitable for sfp/sff appl ications from 155mbps to 4.3 gbps. supports common anode vcsel, common cathode vcsel, or fp laser. may be used with or without a monitor photodiode. programmable temperature comp ensation. modulation output and bias output can be controlled using the programmable module controller m02088 or a fe w discrete resistors. supports ddmi (sff-8472) diagnostics. dc or ac coupled modulation drive. peaking circuit to optimize vcsel response. low overshoot allows high ex tinction ratio with low jitter. supports e-pon burst mode with no extra components automatic laser power cont rol, with ?slow-start?. 3.3v or 5v operation v cc3 -1.3v internal 3.3v reg. input buf f er output buf f er laser driv er automatic power control (laser bias current) tx disable saf ety circuitry with latched fault modulation control v cc v cc3 fail vcc3 sel peak adj sv cc and ib out_cc out- out+ gnd 0 ib out_ca and sgnd ipin disdly dis mod set tc slope mod mon reset bi as mon apc set c apc txpwr mon d in - d in + internal power bus gnd cc sel
2 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet ordering information part number package operating temperature m02069-12 * qfn24 m02069-evm combination electrical a nd optical evaluation board * the letter ?g? designator after the part number indicates that the device is rohs-compliant. refer to www.mindspeed.com for a dditional information. revision history revision level date asic revision description a advance october 2003 x initial release. b advance november 2003 x revision b release. c preliminary february 2004 x revision c release, preliminary. d released march 2005 x revision d release. new data sheet format. changes to absolute maximum ratings, operating temperature, ac a nd dc specifications. new section on video operation. pin configuration typical eye diagram v cc din+ din- vcc3 sel mod mon bias mon c apc v cc3 peak adj tc slope fail reset disdly txpwr mon apc set i pin gnd 0 out+ out- sv cc / ibout cc cc sel mod set ibout ca / sgnd dis 1 6 712 13 18 19 24 \ gnd, connect to pcb ground 4 x 4 mm
02069-DSH-001-D mindspeed technologies? 3 mindspeed proprietary and confidential 1.0 product specification 1.1 absolute maximum ratings these are the absolute maximum ratings at or beyond which the ic can be expected to fail or be damaged. reli - able operation at these extremes for any length of time is not implied. table 1-1. absolute maximum ratings symbol parameter rating units v cc power supply voltage -0.4 to +6.0 v v cc3 3.3v power supply voltage -0.4 to +4.0 v t stg storage temperature -65 to +150 c i biasoutca (max) maximum bias output current for common anode laser 75 ma i biasoutcc (max) maximum bias output current for common cathode laser 30 ma i modca (max) maximum modulation current for common anode laser 70 ma i modcc (max) maximum modulation current for common cathode laser 30 ma d in +/- data inputs -0.4 to v cc3 + 0.4 v dis disable input -0.4 to v cc + 0.4 v bias mon , mod mon bias and modulation output current mirror compliance voltage -0.4 to v cc3 + 0.4 v i pin photodiode anode voltage -0.4 to v cc3 + 0.4 v i pin sink or source current 2.0 ma fail status flag -0.4 to v cc + 0.4 v apc set , mod set set inputs -0.4 to v cc3 + 0.4 v tc slope temperature compensation slope -0.4 to v cc3 + 0.4 v out+, out- output -0.4 to v cc3 + 0.4 v
4 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 1.2 recommended operating conditions 1.3 dc characteristics (v cc = +3.05v to +3.55v or 4.75v to 5.5v, t a = -40 c to +95 c, unless otherwise noted) typical values for common anode are at v cc = 3.3 v, ibout ca = 20 ma, i mod = 20 ma, t a = 25 c, unless otherwise noted. typical values for common cathode are at v cc = 3.3 v, ibout cc = 5 ma, i mod = 5 ma, t a = 25 c, unless otherwise noted table 1-2. recommended operating conditions parameter rating units power supply (v cc -gnd) 3.3 7.5% or 5.0 + 10%,-5% v operating ambient -40 to + 95 c table 1-3. dc characteristics symbol parameter conditions min. typ. max. units i cc supply current excluding i mod and i bias peak adj high (no peaking adjust) common anode operation (1) common cathode operation (1) additional current when peak adj is used. additional current when operating from a 5v supply (2) ? ? ? ? 28 35 ? 48 55 15 ma ibout ca bias current adjust range, common anode mode v(i biasout ) > 0.7v 1 50 ma ibout cc bias current adjust range, common cathode mode v(i biasout ) < 2.5v 0.5 15 ma ib off bias current with optical output disabled dis = high v(ibout ca ) = v cc3 for common anode operation. v(ibout cc ) = 0v for common cathode operation. ? ? 150 a ratio of i bias current to bias mon current cc sel low, common anode mode cc sel high, common cathode mode ? 45.7 13.5 ? a/a v md monitor diode reverse bias voltage 1.5 ? ? v i md monitor diode current adjustment range adjusted with r apcset 10 ? 1500 a ratio of txpwr mon current to monitor photodiode current 1 a/a
product specification 02069-DSH-001-D mindspeed technologies? 5 mindspeed proprietary and confidential c md_max maximum monitor photodiode capacitance for apc loop stability. includes all associated parasitic capacitances. 100 pf ttl/cmos input high voltage (dis) 2.0 ? 5.5 v ttl/cmos input low voltage (dis) ? ? 0.8 v cmos input high voltage (vcc3 sel ) 2.4 v cmos input low voltage (vcc3 sel ) 1.2 v logic output high voltage (fail) with external 10k ? pull-up to v cc . v cc - 0.6 ? ? v logic output low voltage (fail) for 6.8k to 10k ohm resistor when pulled up to 5v for 4.7k to 10k ohm resistor when pulled up to 3.3v ? ? 0.4 v r in differential input impedance data inputs -- 6800 ? ? v self self-biased common-mode input voltage -- v cc3 - 1.3 -- v v incm common-mode input compliance voltage data inputs v cc3 - 1.45 ? v cc3 -[v in(diff) ]/4 v v in(diff) differential input voltage = 2 x (d in + high - d in + low ) 200 ? 2400 mvpp v cc3thl (3) 3.3v supply detection, lower threshold 2.5 2.8 2.9 v v cc3thh (3) 3.3v supply detection, upper threshold 3.65 3.8 4.1 v v cc5thl 5v supply detection, lower threshold 3.9 4.25 4.65 v v cc5thh 5v supply detection, upper threshold 5.45 5.8 6.2 v v ref1 reference voltage for mod set 1.8 1.3 1.4 v v apcset reference voltage for apc set 1.35 v v bl bias_ok lower voltage threshold 0.88 1.0 1.05 v table 1-3. dc characteristics symbol parameter conditions min. typ. max. units
6 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 1.4 ac characteristics (v cc = 3.05 v to 3.55v or 4.7v to 5.5v, ta = -40 c to +95 c, unless otherwise noted) typical values for common anode are at v cc = 3.3 v, iboutca = 20 ma, imod = 20 ma, ta = 25 c, unless otherwise noted. typical values for common cathode are at v cc = 3.3 v, iboutcc = 5 ma, imod = 5 ma, ta = 25 c, unless otherwise noted. v bh bias_ok upper voltage threshold 1.45 1.6 1.7 v v faultl (4) lower voltage threshold for fault inputs ibout ca , out+, c apc , and mod set fail asserts if any of these signals fall below this value. 300 400 mv v faulth (5) upper voltage threshold for fault inputs ibout cc fail asserts if any of these signals fall above this value. 2.6 2.9 v cc3 - 0.2 v v selfl self bias voltage for ibout ca and out+ during disable state 0.5 1.65 2.0 v v selfh self bias voltage for ibout cc during disable state 0 1.25 v notes: 1. excludes bias and modulation currents. 2. bias and modulation currents add directly to power supply current in 5v applications. the additional supply current noted ex cludes these currents. 3. v cc3 ?supply ok? circuitry monitors the internally regulated 3.3v supply when v cc = 5v (vcc3 sel =low). when v cc = 3.3v, v cc3 ?supply ok? circuitry monitors v cc (vcc3 sel =high). 4. a low level at ibout ca does not trigger a fault condition during common cathode operation. 5. a low level at ibout cc does not trigger a fault condition during common anode operation. table 1-4. ac characteristics symbol parameter conditions min. typ. max. units. i mod modulation current adjust range common cathode mode out+ and out- ac coupled into 50 ? load. common anode mode out+ and out- dc coupled into 25 ? load. (1) 1 3 ? 15 45 ma i mod(off) (2) modulation current with output disabled dis = high ? ? 150 a ratio of modulation current to mod mon current cc sel = high, rload = 50 ? cc sel = low ? 30 65 ? a/a i mod-tc programmable range for modulation current temperature coefficient adjustable using tc slope 0 ? 10 4 ppm/c t tcstart temperature at which modulation current tc compensation enables 20 c table 1-3. dc characteristics symbol parameter conditions min. typ. max. units
product specification 02069-DSH-001-D mindspeed technologies? 7 mindspeed proprietary and confidential 1.5 safety logic timing (v cc = 3.05 v to 3.55v or 4.7v to 5.5v, t a = -40 c to +95 c, unless otherwise noted) typical values for common anode are at v cc = 3.3 v, ibout ca = 20 ma, i mod = 20 ma, t a = 25 c, unless otherwise noted. typical values for common cathode are at v cc = 3.3 v, ibout cc = 5 ma, i mod = 5 ma, t a = 25 c, unless otherwise noted. tr modulation output rise time 20% to 80% into 25 ? (3) . for i mod from 3 ma to 30 ma. measured using 11110000 pattern at 2.5gbps. ? 67 80 ps tf modulation output fall time ? 67 80 ps os off overshoot of modulation output current in the ?off? direction into 25 ? load -- 1 2 % rj random jitter ? 0.8 ? ps rms dj deterministic jitter k28.5 pattern at 4.3 gbps (includes pulse width distortion) 10 23 ps pp notes: 1. minimum voltage at out+ > 0.7v. 2. the current through the laser in this state can be made negligible by adding a 1k ? or less resistor in pa rallel with the laser. 3. the m02069 is designed to drive 25 ? loads. external resistance should be added in series or parallel to the laser to create this load impedance. in common cathode mode, 50 ? resistors internal to the m02069 are in parallel with the laser.. table 1-5. safety logic timing symbol parameter conditions min. typ. max. units. t_off dis assert time rising edge of dis to fall of output signal below 10% of nominal (1) 10 s t_on dis negate time falling edge of dis to rise of output signal above 90% of nominal (1) 1 ms t_init time to initialize (2) includes reset of fail; from power on after supply_ok or from negation of dis during reset of fail condition 2 3 5 ms t_fault laser fault time - from fault condition to assertion of fail from occurrence of fault condition or when supply_ok is beyond specified range 100 s t_reset dis time to start reset dis or ena pulse width required to initialize safety circuitry or r eset a latched fault 10 (3) s t_on bm dis negate (turn-on) time during burst-mode operation using integrated switch at svcc (3.3v operation) (4) 300 500 ns t_off bm dis assert (turn-off) time during burst-mode operation using integrated switch at svcc (3.3v operation) (4) 200 500 ns notes: 1. with capc = 2.2nf 2. user-adjustable. specifi cations reflect timing with no external reset capacitor. 3. with < 1nf capacitor from reset pin to ground. 4. imod > 12ma table 1-4. ac characteristics symbol parameter conditions min. typ. max. units.
8 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet figure 1-1. safety logic timing characteristics hot plug (dis low) v cc3 and v cc5 status fail dis laser output (low) (low) v cc3 and v cc5 ?ok? t_on < 1ms, (300 us typ.) slow rise on vcc=3.3v at power-up (dis low) v cc3 fail dis laser output (low) (low) 3.3v t_on < 1ms, (300 us typ.) v cc 3.3v fail state at power-up will depend on pull-up voltage
product specification 02069-DSH-001-D mindspeed technologies? 9 mindspeed proprietary and confidential slow rise on vcc=5v at power-up (dis low) transmitter enable (dis transition low) v cc3 fail dis laser output (low) (low) 3.3v t_on < 1ms, (300 us typ.) v cc 5v v cc3 and v cc5 status fail dis laser output (low) (low) v cc3 and v cc5 ?ok? t_on < 1ms, (300 us typ.) (high) fault recovery behaviour transmitter disable (dis transition high) v cc3 and v cc5 status fail dis laser output (low) v cc3 and v cc5 ?ok? t_off < 10 us, (1 us typ.) (high) fault recovery at: mod set . c apc , out+, ibout ca or ibout cc fail dis laser output fault removed t_reset, 10 us, min. fail remains high until reset by dis going high t_on < 1ms
10 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet figure 1-2. relationship between data inputs and modulation outputs response to fault fault at: apc set fail dis laser output fault remains t_reset, 10 us, min. t_init < 5ms, (3 ms typ.) unsuccessful fault reset attempt fault at: mod set . c apc , outp, ibout cc or ibout ca fail dis laser output fault occurs t_fault < 100 us, (4 us typ.) d in + d in - 100 mv - 1200 mv v in(diff) 200 mv - 2400 mv v out- > 0.7v gnd v out+
02069-DSH-001-D mindspeed technologies? 11 mindspeed proprietary and confidential 2.0 functional description 2.1 pin definitions table 2-1. pin definitions pin number pin name pin equivalent load function 1 v cc power supply, 5v or 3.3v. 2 d in + positive data input. self biased. compatible with ac coupled pecl, ac coupled cml, and dc-coupled pecl (when v cc = 3.3v). when d in + is high, out+ will sink current. 3 d in - see d in + drawing negative data input. self biased compatible with ac coupled pecl, ac coupled cml, and dc-coupled pecl (when v cc = 3.3v). v cc3 d in +, d in - v cc3 -1.3v 4 k ? v c c
12 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 4 vcc3 sel 3.3v v cc select. connect to v cc for v cc = 3.3v operation. connect to gnd for v cc = 5v operation. 5 dis bias and modulation output disable (ttl/cmos). when high or left floating, the bias and modulation outputs are disabled. set low for normal operation. 6 fail safety circuit fault output (ttl/cmos). goes high when a safety logic fault is detected. this output will also be high when dis is high. requires an external pull-up. table 2-1. pin definitions pin number pin name pin equivalent load function 72 k ? vcc3 sel 190 ? v cc v cc3 80 k ? dis 7 k ? v cc3 v c c fail v cc
functional description 02069-DSH-001-D mindspeed technologies? 13 mindspeed proprietary and confidential 7 reset safety circuit reset. leave open for normal operation or add a capacitor to ground to extend the reset time. connect to gnd to disable window comparators at apc set 8 disdly disable delay control. connect to ground for normal operation. in burst mode operation add a capacitor from this pin to ground to set the maximum disable time. disable times greater than this maximum will engage the ?slow-start? circuitry. 9 mod mon modulation current monitor. connect to the corresponding pin on the m02088 or through a resistor to gnd. the current through this pin is typically 1/50th of the modulation current to the laser when cc sel is low or 1/25th the mo dulation current when cc sel is high. this pin may be left open if the feat ure is not needed and the m02069 current consumption will be reduced by 0.5ma typically. table 2-1. pin definitions pin number pin name pin equivalent load function reset 190 ? v cc v cc3 disdly 190 ? v cc 190 ? mod mon v cc v cc3
14 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 10 bias mon see mod mon drawing bias current monitor. connect to the corresponding pin on the m02088 or through a resistor to gnd. the current through this pin is typically: 1/45.7th of the bias current to the laser when cc sel is low 1/13.5th of the bias current to the laser when cc sel is high this pin may be left open if the feat ure is not needed and the m02069 current consumption will be reduced by 0.5 ma typically. 11 txpwr mon transmit power monitor. connect to the corresponding pin on the m02088 or through a resistor to gnd. the current through this pin is approximately the same as the photodiode current into i pin . the current out of this pin is low pass filtered (no external filtering required). this pin may be left open if the feat ure is not needed and the m02069 current consumption will be reduced by the i pin current. 12 apc set average power control, laser bias current adjustment. connect to the corresponding pin on the m02088 or to a resistor between this pin and ground to set the bias current to the laser. the apc loop will adjust the laser bias current to maintain a voltage at apc set of approximately 1.3v. the current sourced fr om this pin is approximately the same as the current into i pin . table 2-1. pin definitions pin number pin name pin equivalent load function 33 ? txpwr mon v cc v cc3 apc set v cc v cc3
functional description 02069-DSH-001-D mindspeed technologies? 15 mindspeed proprietary and confidential 13 i pin for cc sel low - current input from monitor photodiode anode. the apc loop will adjust the laser bias current to maintain a voltage at apc set of approximately 1.3v and at this pin of approximately one v gs . for cc sel high - current source for monitor photodiode cathode. the apc loop will adjust the laser bias current to maintain a voltage at apc set of approximately 1.3v and at this pin of approximately one v gs below v cc3 . 14 ibout ca (cc sel = low) laser bias current output for common anode lasers (cc sel must be low). connect directly to laser cathode or at higher bit rates through a ferrite or a resistor to isolate the capacitance of this pin from the modulation drive, (~ 6pf). maintain a voltage at least 0.7v above gnd at this pin sgnd (cc sel = high) switched ground connection for common cathode lasers (cc sel must be high). provides redundant shutdown during a disab le or fault condition. this switch is disabled during common anode operation. table 2-1. pin definitions pin number pin name pin equivalent load function 33 ? i pin v c c v cc3 ibout ca v c c sgnd v c c
16 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 15 gnd o ground for output stage. may be connected directly to circuit board ground. at high bit rates (>2gb/s) an optional inductor or ferrite may be added to reduce switching transients. 16 out+ positive modulation current output (ac or dc coupled to cathode of laser in common anode designs). sinks current when d in + is high. maintain a voltage > 0.7v at this pin. 17 out- see out+ drawing negative modulation current output (ac coupled to anode of laser in common cathode designs). sinks current when d in - is high maintain a voltage > 0.7v at this pin. table 2-1. pin definitions pin number pin name pin equivalent load function gnd 0 v cc out+ v cc gnd 0
functional description 02069-DSH-001-D mindspeed technologies? 17 mindspeed proprietary and confidential 18 sv cc (cc sel = low) switched vcc. supplies laser current for common anode designs. (cc sel must be low). provides redundant shutdown during a disab le or fault condition. this switch is disabled during common cathode operation. ibout cc (cc sel = high) laser bias current output for co mmon cathode laser designs (cc sel must be high). connect directly to laser anode or at higher bit rates through a ferrite or a resistor to isolate the capacitance of this pin from the modulation drive. maintain a voltage of < 2.5v at this pin. 19 cc sel laser select input. when high, common cathode operation is selected; ibout cc and sgnd are functional and internal 50 ? output terminations ar e switched in at the modulation outputs out+ and out-. when low or floating, common anode operation is selected; ibout ca and sv cc are functional and the 50 ? internal termination resi stors at out+ and out- are disconnected. table 2-1. pin definitions pin number pin name pin equivalent load function sv cc v c c v cc3 v cc v cc3 i bout cc 12 k ? 48 k ? cc sel 24 k ? v cc v cc3
18 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 20 c apc automatic power control loop dominant pole capacitor. (connect a capacitor between this pin and v cc3 .) a nominal capacitance of 2.2nf will give a bias current enable time of less than 1 ms. 21 v cc3 3.3v applications - power supply input. connect to v cc . 5v applications - do not connect to 5v. internally generated 3.3v power supply output. do not attach to non-m02069 circuitry. 22 peak adj peaking adjustment i nput. a resistor (2k ? to 20k ? ) between this pin and ground sets the amount of peaking current on out- to improve the fall time of the laser output. the peaking current is approximately (5 * (1.3v / 2 k ? + resistance to ground)). connect to v cc3 to disable peaking control. table 2-1. pin definitions pin number pin name pin equivalent load function 100 ? c apc v cc v cc3 v c c v c c 1.8 k ? peak adj v c c v cc3 + - 1.28v
functional description 02069-DSH-001-D mindspeed technologies? 19 mindspeed proprietary and confidential 23 mod set modulation current control. connect a r esistor to ground to set the modulation current. 24 tc slope see mod set drawing modulation current temperature compensation slope adjustment. connect a resistor to ground to set the temperature coefficient. leave open to minimize the temperature compensation coefficient. center pad gnd ground. must be connected to ground for proper operation. this is the only package ground connection. table 2-1. pin definitions pin number pin name pin equivalent load function 190 ? mod set v c c v cc3 + - 1.28v
20 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet figure 2-1. pin assignments for m02069 device v cc din+ din- vcc3 sel mod mon bias mon c apc v cc3 peak adj tc slope fail reset disdly txpwr mon apc set i pin gnd 0 out+ out- sv cc / ibout cc cc sel mod set ibout ca / sgnd dis 1 6 712 13 18 19 24 \ gnd, connect to pcb ground 4 x 4 mm
02069-DSH-001-D mindspeed technologies? 21 mindspeed proprietary and confidential 3.0 functional description 3.1 overview the m02069 is a highly integrated laser driver intended for applications to 4.3 gbps. many features are user-adjustable, including common anode or common cathode laser mode, the apc (automatic power control) loop bias control (via a monitor photodiode), modulation current, temperature compensation control of modulation current, and peaking adjustment. the part may be operated from a 3.3v or 5v supply. for e-pon and other burst-mode applications, the part supports fast and accurate turn-on and turn-off of the laser bias and modulation currents. safety circuitry is also included to provide a latched shut -down of laser bias and modulation current if a fault condi - tion occurs. an internal vcc switch provides redundant shutdown when operating the device in common anode configuration. an internal ground switch provides redundant shutdown when operating the device in common cath - ode configuration. modulation, bias, and transmit power monitor current mirrors are provided for ddmi applications and allow moni - toring without disturbing the analog signal path.
22 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet figure 3-1. m02069 block diagram example v cc3 -1.3v internal 3.3v reg. input buffer output buffer laser driv er automatic power control (laser bias current) tx disable saf ety circuitry with latched fault modulation control v cc v cc3 fail vcc3 sel peak adj sv cc and ib out_cc out- out+ gnd 0 ib out_ca and sgnd ipin disdly dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus gnd cc sel
functional description 02069-DSH-001-D mindspeed technologies? 23 mindspeed proprietary and confidential 3.2 features ? high speed operation; suitable for sfp/sff applications from 155mbps to 4.3 gbps. supports common anode vcsel, common cathode vcsel, or fp laser. may be used with or without a monitor photodiode. programmable temperature compensation. modulation output and bias output can be controlled using the pro - grammable module controller m02088 or a few discrete resistors. supports ddmi (sff-8472) diagnostics. dc or ac coupled modulation drive. peaking circuit to optimize vcsel response. low overshoot allows high ex tinction ratio with low jitter. supports e-pon burst mode with no extra components automatic laser power control, with ?slow-start?. 3.3v or 5v operation 3.3 general description 3.3.1 detailed description the m02069 laser driver consists of the following circuitry: an internal regulator, common anode/common cathode configuration control, bias current generator and automatic power control, data inputs, peaking adjust, modulation current control, modulator output, laser fail indication, disable control, and monitor outputs for the bias current, modulation current, and transmitted power. 3.3.2 internal regulator the m02069 contains an internal 3.3v regulator so high bi t rate performance can be achieved with 5v or 3.3v power supply. when operating from a 5v supply (v cc is connected to +5v), an internal regulator provides a voltage of approxi - mately 3.3v to the majority of the on-chip circuitry. the on-chip regulator is internally compensated, requiring no external components. when a 3.3v supply is used (v cc and v cc3 connected to 3.3v) the regulator is switched off and the internal circuitry is powered directly through the v cc3 supply pin. the decision as to whether or not the internal regulator is required is made via the vcc3 sel pin, which also determines whether the safety circuitry needs to monitor for proper +5v supply voltage. sv cc is sourced from v cc3 through a switch for common anode applications (this pin becomes ib out_cc in com - mon cathode applications). when a f ault condition is present, fail will assert and the switch sourcing sv cc will open so no current can pass through the laser. sv cc does not need any external capacitance, if capacitance to ground is added at sv cc it should be less than or equal to 100pf.
24 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet v cc and v cc3 status are internally monitored by the m02069 during power-up and normal operation. during power-up the ?slow-start? circuitry requires that v cc and v cc3 each reach an acceptable level before enabling bias or modulation current. 3.3.3 common cathode/common anode configuration control when cc sel is programmed high, the m02069 is configured for common cathode lasers. when cc sel is low, the m02069 is configured for common anode lasers. the state of the cc sel pin determines: 1. whether bias current is sourced or sunk 2. whether monitor photodiode current is sunk or sourced 3. whether internal termination resistors at out+ and out- are active 4. whether the redundant safety switch disconnects vcc or gnd from the output circuitry. the affected pins are out+, out-, sv cc /ib outcc , and sgnd/ib outca . the table 3-2 below shows the configu - ration of each pin for the 2 states of cc sel. table 3-1. pin connection for 3.3v and 5v v cc pin connection for: v cc = 3.3v v cc = 5v pins dependent on v cc voltage v cc3 (pin 21) connect to v cc reference for c apc and peak adj c apc (pin 20) capacitor between c apc and v cc3 or v cc capacitor between c apc and v cc3 (not v cc ) peak adj (pin 22) connect to v cc3 or v cc to disable connect to v cc3 to disable (not v cc ) vcc3 sel (pin 4) connect to v cc3 or v cc connect to gnd
functional description 02069-DSH-001-D mindspeed technologies? 25 mindspeed proprietary and confidential 3.3.4 bias current generator and automatic power control the m02069 can either source or sink bias current for the laser diode depending on whether it is in common anode or common cathode mode. in common cathode mode (cc sel high) ib outcc will source current. in common anode mode (cc sel low) ib outca will sink current. regardless of whether the m02069 is configured for common anode or common cathode mode, the following infor - mation applies. to maintain constant average optical power, the m02069 incorporates a control loop to compensate for the changes in laser threshold cu rrent over temperature and lif etime. the bias current will be determined by the value of the external resistor r apcset and the transfer efficiency between the laser and monitor photodiode. the photo current from the monitor photodiode mounted in the laser package is sunk or sourced at i pin . this photo current is mirrored and an equivalent current is sourced from pins txpwr mon and apc set . the apc loop adjusts the laser bias current (hence the monitor diode photo current) to maintain a voltage of 1.3v at apc set . r apcset * i pin = 1.3 v the apc loop has a time constant determined by c apc, r apcset and the transfer efficiency between the laser and monitor photodiode. the larger the c apc capacitor the lower the bandwidth of the loop and the larger the r apcset resistor the lower the bandwidth of the loop. in general, it is recommended that at least 2.2 nf of external capacitance be added externally between c apc and v cc3 to assure loop stability. with use of a 2.2 nf capacitor, the bias current can reach 90% of its final value within 1 millisecond. table 3-2. pin connection for common anode and common cathode laser modes pin connection when: cc sel = high cc sel = low pins dependent on cc sel setting pin 18 sv cc inactive supply for laser and all output load components. ib outcc laser bias source current. inactive pin 14 sgnd ground for laser and all output load components inactive ib outca inactive laser bias sink current. pin 13 i pin monitor photodiode source current monitor photodiode sink current pin 22 peak adj controls negative going edge of out- controls negative going edge of out-, (do not use) internal 50 ? pull-up resistors on out+ and out- active inactive ratio of bias current to bias mon current 13.5:1 45.7:1 ratio of modulation current to mod mon current 30:1 65:1
26 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet in common anode mode with a 2.2nf c apc capacitor the apc loop bandwidth is less than 30 khz for almost all combinations of r apcset and transfer efficiency., which should be adequate for bit rates of 155mbps. (and all higher bit rates). in common cathode mode with a 2.2nf c apc capacitor the apc loop bandwidth will be slightly higher, but should be less than 40 khz for almost all combinations of r apcset and transfer efficiency. contact the factory with your specific values of c apc , r apcset , and transfer efficiency to determine the maximum apc loop bandwidth in your application. the bias generator also includes a bias current monitor mirror (bias mon ), whose output current is typically 1/ 45.7th of the bias current in common anode mode (ccsel = low) or 1/13.5th of the bias current in common cath - ode mode (ccsel = high). this pin can be connected directly to an m02088 ddmi module controller or through a resistor to ground. if this function is not needed this pin can be left open. the m02069 can be used without a monitor photodiode by connecting bias mon to apc set ( see figure 3-7 and figure 4-3 ) . in this case the m02069 will increase the bias current (hence the bias mon current) to the laser until the voltage at apc set is approximately 1.3v. 3.3.5 data inputs the inputs to the data buffers are self-biased through 4 k ? resistors to an internal voltage vtt which is approxi - mately v cc3 - 1.3v. both cml and pecl inputs signals can be ac coupled to the m02069, or in 3.3v applications pecl inputs can be dc coupled to the data inputs. in most applications the data inputs are ac coupled with con - trolled impedance pcb traces which will need to be termi nated externally with a 100 ? or 150 ? resistor between the + and - inputs. 3.3.6 peak adjust some vcsels do not turn off quickly without peaking the negative going edge. in common cathode applications, peaking on this edge can be added with a resistor connected between the peak - adj input and gnd. the amount of peaking is approximately peaking current = 5 * (1.3v / 2 k ? + resistance to ground). the resistance to ground should be between 2 k ? and 20 k ?. ( which will result in a peaking currents from 2.6ma to 260 a.) peaking control can be disabled by connecting peak adj to v cc3 , resulting in no peaking current and reducing supply current by approximately 2 ma. in common anode configuration the peak adj pin should be connected to v cc3 . note: unlike the rest of the signal currents in the m02069, the output peak adjust current is unbalanced (single- sided drive). the designer should be aware that the use of peaking may result in unwanted emi emissions. if emi problems are traced to the use of peaking, high frequency decoupling (10pf capacitor or smaller) may be needed on the v cc line. 3.3.7 modulation control there are two programmable control lines for controlling the modulation current and its temperature compensation. these inputs can be programmed simply with a resistor to ground or they can be digitally controlled by the mind - speed module controller m02088.
functional description 02069-DSH-001-D mindspeed technologies? 27 mindspeed proprietary and confidential the modulation current amplitude is controlled by the mod set input pin. the modulation current is temperature compensated by the tc slope input. if the temperature compensation at tc slope is disabled, the modulation output current is simply: iout = 42 x (1.3v / r modset ) when cc sel is low and iout = 22 x (1.3v / r modset ) when cc sel is high and a 50 ? vcsel is used. where r modset is the resistance from pin mod set to ground. to temperature compensate the modulation current, choose r tcslope to meet the follo wing relationship: r tcslope = 19.5*(tc) -1.5 , where tc is the desired slope of the modulation current from 25c to 85c in%/c and r tcslope is in k ?. if no temperature compensation is desired, leave r tcslope open. in any case, r tcslope will have negligible effect at m02069 case temp eratures below 10c. for example: given a common cathode vcsel with a desired modulation current at low temperatures of 10 ma and a tempera - ture coefficient of -0.5%/c at high temperatures (which will require a laser driver te mperature coefficient of +0.5%). choose r modset = 22 x (1.3v / 10ma) = 2.8 k ?. choose r tcslope =19.5*(0.5) -1.5 k ? = 55k ? . figure 3-2. selecting tc slope resistance in common anode configuration -30.00 -20.00 -10.00 0.00 10.00 20.00 30.00 40.00 50.00 60.00 -40 -20 0 20 40 60 80 100 ambient temperature in degrees c % change in modulation current rtcslope: 22k 27k 33k 39k 47k 51k 62k 75k 82k 100k 120k 150k 220k 390k 750k open
28 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 3.3.8 modulator ( figure 3-4 ) the output stages out+ and out- are designed to drive 25 ? output loads over a wide range of currents and cir - cuit architectures. the vcsel may be a common anode or common cathode device. the output can be ac, dc, or differentially coupled depending on the s upply voltage and laser configuration. in a common anode configuration with a vcsel ( figure 4-1 ), out+ should be connected through a capacitor to the vcsel. a pull-up resistor should be added in parallel to the vcsel from svcc to the out+ output. the dynamic impedance of the parallel combination of the vcsel and pull-up resistor should be roughly 25 ohms. a 24 ohm pull-up resistor should also be added from svcc to out- so the currents and voltage swings in the two out - puts are balanced. in a common anode configuration with a fabry-perot laser ( figure 4-4 ), out+ may be ac, dc, or differentially coupled to the laser cathode. a resistor should be added in series with the laser such that the dynamic impedance of the series combination of the laser and resistor should be roughly 25 ohms. a 24 ohm pull-up resistor to sv cc is needed on the out- output. for common cathode operation with a vcsel ( figure 4-2 ), internal 50 ohm terminations are switched in between the out+ and out- outputs and v cc3 . vcsels with impedances from 25-75 ? can be simply ac coupled to the out- output with no additional load matching resistors. in this case out+ should be ac coupled to ground through 50 ?. the vcsel driver output stage is separately grou nded from the rest of the circuitry (through gnd 0 ). at higher data rates (above 2gb/s) gnd 0 may be connected to ground through a minimum of 2 nh of inductance to improve the transient response. a ferrite can also provide the extr a isolation (murata blm18hg471sn1 or equivalent recom - mended). figure 3-3. selecting tc slope resistance in common cathode configuration -30.0 -20.0 -10.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 -40 -20 0 20 40 60 80 100 ambient temperature in degrees c % change in modulation current rtcslope: 27k 33k 39k 47k 51k 62k 75k 82k 100k 120k 150k 180k 220k 390k 510k open
functional description 02069-DSH-001-D mindspeed technologies? 29 mindspeed proprietary and confidential figure 3-4. modulator output 3.3.9 fail output the m02069 has a fail alarm output whic h is compatible with the tx_fault signalling requirem ents of common pluggable module standards. the esd protection on this pin provides a true open collect or output that can withstand significant variation in v cc when signalling between circui t boards. also, if t he m02069 loses power the fail ou tput will continue to pull up and signal a fail condition. in a simple static protection scheme used by other ics the protection diodes would clamp the fail signal to ground when the chip loses power. 3.3.10 tx disable and disable delay control the dis pin is used to disable the transmit signal. when the transmit is disabled both the bias and modulation cur - rents are off. the dis input is compatible with ttl le vels regardless of whether vcc = 5v or vcc = 3.3v. in most module appli - cations a pull-up resistor to vcc between 4.7k ? and 10k ? is required. because this pin has an internal 7k ? resis - tor to v cc , no external pull-up resistor is required. the disdly pin is used in conjunction with the dis pin to control bias current enable time. (the modulation current enable time is always less than 600 ns). unless the disdly pin is programmed for burst mode, the apc loop enable time will be slow (l ess than 1 ms with a c apc = 2.2nf). when a capacitor c is added to the disdly pin, th e slow-start circuitry is disabled for typically t = 3 * 10 6 (sec/f)* c (f) following the dis high transition. if dis transitions low during this time, the bi as current will quickl y return to within 90% of its final value (within less than 500ns). if dis tr ansitions low after this time the slow-start circuitry will engage and the bias current will not re turn to its final value for appro ximately 1ms (depending on the c apc capaci - tor). 3.3.11 burst mode operation ( figure 3-5 ) the m02069 will meet the timing requirements of epon with the addi tion of a capacitor at disdly (see paragraph above and figure 3-5 ). out+ 0.4pf 0.75 nh out- gnd 0 (optional external inductance) * * denotes bond wire internal to mlf package 0.75 nh * out+ and out- should not be driven below 0.7v
30 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet as shown in figure 4-4 , the laser should be dc coupled to out+. v cc may be 3.3v or 5v. figure 3-5. dis and disly timing dis disdly out+ ibias out dis disdly out+ ibias out epon burst mode operation normal operation, (slow- start whenever part enabled) t_on bm < 500 ns for i mod > 10 ma t_off bm < 500 ns t_off < 10 s t_on < 1 ms, depending on c apc
functional description 02069-DSH-001-D mindspeed technologies? 31 mindspeed proprietary and confidential 3.3.12 video operation the m02069 can be used to transmit video optical data even in the presence of the pathological pattern. this is done by fully dc coupling the signal from the input to the laser output. in most data communications applications, ac coupling occurs at three points in a lase r driver schematic: the data inputs, the apc control, and coupling the modulation current to the laser. in the m02069, dc coupling can be used at all three of these points. with dc coupling the laser output will not be a fu nction of the data input one/zero den - sity. the data inputs can be dc coupled using pecl or cml levels. the apc of the bias current is controlled by feedback from the monitor photodiode in the laser package in most communications applications. in video applications this monitor photodiode should not be used if the pathological pattern may occur. instead, the apc should be controlled in an "open loop" configuration. (open loop simply means a monitor photodiode is not used). in the open loop configuration the apc is controlled by a resistor or a thermistor network or a look-up table and dac. this re moves ac time constants from the bias current. in figure 3-6 the biasmon pin is connected to the apcset pin. in this case the bias current is: ibias = 45.7 x (1.35v / rapc set ) the modulation current output out+ can be dc coupled to the laser as shown in figure 3-6 . there are no ac time constants in the modulation current amplitude in this configuration. figure 3-6. video application block diagram v cc3 v cc v cc3 for v cc =3.3v, tie v cc3 to v cc . v cc3 -1.3v internal 3.3v reg. input buffer output buffer laser driver automatic power control (laser bias current) tx di sabl e safety ci rcui try wi th latched fault modulation control v cc v cc3 fail vcc3 sel peak adj sv cc out- out+ gnd 0 ib out_ca ipin disdly dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus cc sel connect to v cc when v cc = 3.3v connect to gnd when v cc = 5v v cc3
32 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 3.3.13 current monitors to facilitate complying wit h laser safety and ddmi 1 requirements, output monitors are provided for transmit power (txpwr mon ), bias (bias mon ), and modulation current (mod mon ). these outputs will source curr ent proportional to the em itted optical power (txpwr mon ) the bias current (bias mon ) and modulation current (mod mon ). these outputs may be connected direct ly to the corresponding pins on the m02088 module controller. to use these pins without an m02088 they should be terminated with a resistor to ground that sets the desired full- scale voltage (not to exceed 2.5v). if the outputs of these monitors are not needed, txpwr mon , bias mon , and mod mon can all be left floating and the chip current consumption will be reduced by the valu e of the monitor currents. 3.4 laser eye safety using this laser driver in the manner described herein does not ensure that the resulting laser transmitter complies with established standards such as iec 825. users must ta ke the necessary precautions to ensure that eye safety and other applicable standards are met. note that determining and implementing the level of fault tolerance required by the applications that this part is going into is the responsibility of the transm itter designer and manufac - turer since the application of this device cannot be controlled by mindspeed. 1 digital diagnostic monitoring interface for optical tranceivers, defined in sff-8472.
functional description 02069-DSH-001-D mindspeed technologies? 33 mindspeed proprietary and confidential 3.4.1 safety circuitry safety circuitry in the m02069 will disa ble the modulation and bias current and assert the fail output immediately upon detecting a fault condition. in addition, the supply voltage that sources or sinks the laser current (sv cc or sgnd) will immediately go open circuit and prevent any curren t from passing th rough the laser. fault conditions checked by the m02069 include shorts to ground or v cc of all pins which can increase the laser modulation or bias current. for an initialization or power-up sequence to be successful, all the fault detection monitors must signal that the chip is ?healthy?. when dis goes low, pins are checked for shorts to ground or v cc and a fail condition is latched if there is a fault. if the state of the pins is ok , a one-shot at the re set pin begins a countdown which will latch a fail condition if the bias current has not stabilized to an acceptable level during the one-shot time. the one-shot can be extended with an external capacito r connected from the reset pin to ground. the one-shot 1 width is approximately t one-shot = 3 ms + (0.3 ms/pf)x(external capacitance). figure 3-7. safety circuit block diagram 1.the one-shot is actually compris ed of an oscillator and 10-bit counter. vcc pin 5v hi/lo limits vcc3 pi n 3.3v hi/lo limits 5v mode: and vcc3 pi n 3.3v hi/lo limits 3.3v mode: and 1 vcc pin 5v hi/lo limits vccok detection: crudefaults detection: outp (2061) cmpc modset ibiasout iboutca > 300mv > 300mv > 300mv > 300mv > 300mv iboutcc < (vcc3 C 300mv) (2069 C common anode) (2069 C common cathode) dela y set srlatch: q rese t on e -shot: star t 3ms + tcap t=0 pulse n ote: pulse stays high if reset pin is gnded . reset optional cap for longer t_init and window compare: hi limit mpcse t low limi t or set srlatch: q reset and and and biasok detection: output_enable vcc_ok crudefaults_ok bias_ok latch for crudefaults latch for bias_ok if chip is healthy, then enable the outputs and start 3msec reset pulse(one-shot) (open-collector) failout or dis
34 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet 3.5 fault conditions this section describes the m02069 operating modes during fault conditions. over voltage, under voltage, pins shorted to v cc and pins shorted to ground are included in the fault table 3-3 . table 3-3. circuit response to single-point fault conditions pin name circuit response to over-voltage condition or short to v cc circuit response to under-voltage condition or short to ground v cc bias and modulation outputs are disabled once v cc rises above the supply detection (h igh voltage) threshold (see table 1-3 ) bias and modulation outputs are disabled once v cc drops below the supply detection (low voltage) threshold din+, din- the apc loop will attempt to compensate for the change in output power. if the apc loop can not maintain the set average power, a fault state occurs. (1,2,3) the apc loop will attempt to compensate for the change in output power. if the apc loop can not maintain the set average power, a fault state occurs. (1,2,3) vcc3 sel does not affect laser power. does not affect laser power. dis bias and modulation outputs are disabled. sv cc is opened when cc sel is low or floating (or sgnd is opened when cc sel is high) does not affect laser power ( normal condition for circuit operation). fail does not affect laser power. does not affect laser power. reset does not affect laser power. does not affect laser power. mod mon does not affect laser power. does not affect laser power. bias mon does not affect laser power. does not affect laser power. txpwr mon does not affect laser power. does not affect laser power. apc set a fault state occurs. (1) a fault state occurs. (1) i pin a fault state occurs. (1) a fault state occurs. (1) ibout ca (3) the laser will be turned off, then a fault state occurs. (1) a fault state occurs. (1) ibout cc (4) a fault state occurs. (1) the laser will be turned off, then a fault state occurs. (1) out+ (3) laser modulation is prevented; the apc loop will increase the bias current to compensate for the drop in laser power if it is dc coupled. if the set output power can not be obtained, a fault state occurs. (1,2) a fault state occurs. (1) out- (4) does not affect laser power during common cathode operation because output is ac coupled. does not affect laser power dur ing common cathode operation because output is ac coupled. sv cc (3) does not affect laser power. laser bias current will be shut off and a fault state occurs. (1) c apc laser bias current will be shut off, then a fault state occurs. (1) a fault state occurs. (1) v cc3 bias and modulation outputs are disabled once v cc3 rises above the supply detection (high voltage) threshold bias and modulation outputs are disabled once v cc3 drops below the supply detection (low voltage) threshold peak adj does not affect laser power. does not affect laser power cc sel normal operation for common cathode configuration. if the m02069 is configured for common anode drive, a fault state will occur. (1) normal operation for common anode configuration. if the m02069 is configured for common cathode drive, a fault state will occur. (1) mod set when the laser is dc coupled in common anode configuration, the apc loop will attempt to compensate for the drop in output power. if the apc loop can not maintain the set average power, a fault state occurs. (1,2) a fault state occurs. (1)
functional description 02069-DSH-001-D mindspeed technologies? 35 mindspeed proprietary and confidential tc slope does not affect laser power. when the laser is dc coupled in common anode configuration, the apc loop will attempt to compensate for any change in output power. if the apc loop can not maintain the set average power, a fault state occurs. (1,2) disdly does not affect laser power. does not affect laser power. notes: 1. a fault state will assert the fail out put, disable bias and modulation outputs an d will either open the switch at sv cc (cc sel =high) or s gnd (cc sel =low). 2. does not affect laser power when the output is ac coupled to the laser. 3. does not affect l aser power during common cathode operation. 4. does not affect l aser power during common anode operation. table 3-3. circuit response to single-point fault conditions pin name circuit response to over-voltage condition or short to v cc circuit response to under-voltage condition or short to ground
36 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet
02069-DSH-001-D mindspeed technologies? 37 mindspeed proprietary and confidential 4.0 applications 4.1 applications epon ftth modules gigabit ethernet modules 1g/2g/4g fibre channel modules digital video figure 4-1. application diagram, common anode vcsel v cc3 v cc v cc3 for v cc =3.3v, tie v cc3 to v cc . v cc3 -1.3v internal 3.3v reg. input buffer output buffer laser driver automatic power control (laser bias current) tx disabl e safety circui try with latched fault modulation control v cc v cc3 fail vcc3 sel peak adj sv cc out- out+ gnd 0 ib out_ca ipin disdly dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus cc sel connect to v cc when v cc = 3.3v connect to gnd when v cc = 5v v cc3 v cc3 (may be dc coupled, but extra bias current will be required for the pull-up resistor on out+)
38 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet figure 4-2. application diag ram, common cathode vcsel figure 4-3. application diagram, co mmon cathode vcsel w/o monitor diode v cc3 -1.3v internal 3.3v reg. input buffer output buffer laser dri ver automatic power control (laser bias current) tx di sabl e safety circuitry wi th latched fault modulation control v cc v cc3 fail vcc3 sel peak adj out- out+ gnd 0 ib out_cc ipin dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus v cc3 v cc v cc3 sgnd cc sel disdly v cc for v cc =3.3v, tie v cc3 to v cc . connect to v cc when v cc = 3.3v connect to gnd when v cc = 5v v cc3 -1.3v internal 3.3v reg. input buf f er output buf f er laser driv er automatic power control (laser bias current) tx disable saf ety circuitry with latched fault modulation control v cc v cc3 fail vcc3 sel peak adj out- out+ gnd 0 ib out_cc ipin dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus v cc3 v cc v cc3 sgnd cc sel disdly v cc3 for v cc =3.3v, tie v cc3 to v cc . connect to v cc when v cc = 3.3v connect to gnd when v cc = 5v
applications 02069-DSH-001-D mindspeed technologies? 39 mindspeed proprietary and confidential figure 4-4. application diagram, co mmon anode fp laser, dc coupling v cc3 v cc v cc3 for v cc =3.3v, tie v cc3 to v cc . for epon operation, add a capacitor to gnd at disdly. v cc3 -1.3v internal 3.3v reg. input buffer output buffer laser driver automatic power control (laser bias current) tx disable safety circuitry with latched fault modulation control v cc v cc3 fail vcc3 sel peak adj sv cc out- out+ gnd 0 ib out_ca ipin disdly dis mod set tc slope mod mon reset bias mon apc set c apc txpwr mon d in - d in + internal power bus cc sel connect to v cc when v cc = 3.3v connect to gnd when v cc = 5v v cc3
40 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet
02069-DSH-001-D mindspeed technologies? 41 mindspeed proprietary and confidential 5.0 packaging specification 5.1 package specification figure 5-1. qfn24 package information note: view is for a 20 pin package. all dimensions in the tables apply for the 24 pin package
42 mindspeed technologies? 02069-DSH-001-D mindspeed proprietary and confidential m02069 data sheet
02069-DSH-001-D mindspeed technologies? 43 mindspeed proprietary and confidential ? 2003, 2004, 2005 mindspeed technologies tm , inc. all rights reserved. information in this document is provided in connection with mindspeed technologies tm ("mindspeed tm ") products. these materials are provided by mindspeed as a service to its customers and may be used for informational pur- poses only. except as provided in mindspeed?s terms an d conditions of sale for such products or in any sepa- rate agreement related to this document, mindspeed as sumes no liability whatsoever . mindspeed assumes no responsibility for errors or om issions in these materials. mindspeed may make changes to specifications and prod- uct descriptions at any time, without notice. mindspeed makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatib ilities arising from future ch anges to its specifications and product descriptions. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. these materials are provided "as is" without warranty of any kind, either express or implied, relating to sale and/or use of mindspeed products including liability or war- ranties relating to fitness for a particula r purpose, consequential or incidental damages, merchantability, or infringement of any patent, copyright or other intellec- tual property right. mindspeed further does not warrant the accuracy or complete- ness of the information, text, graphics or other items contained within these materials. mindspeed shall not be liable for any special, indirect, incidental, or conse- quential damages, including without limitation, lost reven ues or lost profits, which may result from the use of these materials. mindspeed products are not intended for use in medical, lifesaving or life sustaining applications. mindspeed cus- tomers using or selling mindspeed products for use in such applications do so at their own risk and agree to fully indemnify mindspeed for any damages resulting from such improper use or sale.
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