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general description the max4670 is an integrated t1/e1/j1 analog protec- tion switch for 1+1 and n+1 line-card redundancy applications. it protects two t1/e1/j1 ports by combin- ing eight spdt switches in a single package. the switch is optimized for high-return loss and pulse-tem- plate performance in t1/e1/j1 long-haul and short-haul applications. the part offers built-in chip-side surge protection capability for short-haul intrabuilding appli- cations. the max4670 replaces two diode arrays or two tran- sient voltage suppressors (tvss) and four dual-spdt relays, significantly reducing board space and simplify- ing pc board routing. the max4670 pinout is targeted for t1/e1/j1 applications, resulting in a simplified layout when interfacing with standard line transformers and line interface units (lius). the max4670 has four 1.0 ? (max) on-resistance switch- es with 60pf/40pf on-/off-capacitances for interfacing to the liu transmitter outputs. the max4670 also includes four 10 ? (max) on-resistance switches with low 24pf/12pf on-/off-capacitances for interfacing to the liu receiver inputs. four logic inputs control the receive/ transmit pairs, in addition to a switch input that con- nects all switches to the system? protection bus. the max4670 operates from a single +2.7v to +3.6v supply and is available in 32-pin thermally enhanced tqfn package. the max4670 is specified over the -40 c to +85 c operating temperature range. applications optical multiplexers (adms, m13s, etc.) edge routers multiservice switches base station controllers (wireless infrastructure equipment) media gateways (voip) features single +3.3v supply voltage quad-dpdt/octal-spdt switches support two t1/e1/j1 ports low r on 0.7 ? (typ) in transmit path; 5 ? (typ) in receive path low c on /c off 60pf/40pf (typ) in transmit path 24pf/12pf (typ) in receive path chip surge protection iec 61000-4-5 (8s to 20s surge) class 2 (1kv) -70db (typ) crosstalk/off-isolation (3mhz) small, 32-pin tqfn package max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ________________________________________________________________ maxim integrated products 1 19-3798; rev 0; 09/06 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. top view 1 inb 2 com3 3 com4 4 gnd 5 inc 6 com5 7 com6 8 switch 24 nc3 23 no3 22 nc4 21 no4 20 nc5 19 no5 18 nc6 17 no6 9 v+ 10 ind 11 com7 12 com8 13 no8 14 nc8 15 no7 16 nc7 32 v+ 31 ina 30 com2 29 com1 28 nc1 27 no1 26 nc2 25 no2 max4670 *ep tqfn * note: exposed paddle connected to gnd pin configuration ordering information part* pin- package surge protection pkg code max4670etj 32 tqfn (5mm x 5mm) yes t3255-4 * this part operates at a -40c to +85? temperature range. functional diagram/truth table appears at end of data sheet.
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (all voltages referenced to gnd.) v+, in_, switch ......................................................-0.3v to +4v com_, no_, nc_ (note 1) ...........................-0.3v to (v+ + 0.3v) continuous current no_, nc_, com_ (tx interface).................................. 150ma no_, nc_, com_ (rx interface) ................................. 100ma peak currents no_, nc_, com_ (tx interface) (pulsed at 1ms, 10% duty cycle) ................................ 300ma no_, nc_, com_ (rx interface) (pulsed at 1ms, 10% duty cycle) ................................ 200ma peak surge currents poised at 8s ..................................................................21.4a poised at 20s ................................................................11.9a continuous power dissipation (t a = +70 c) 32-pin tqfn (derate 21.3mw/ c above +70 c) .......1702mw 38-pin tssop (derate 13.7mw/ c above +70 c) .....1096mw operating temperature range ...........................-40 c to +85 c storage temperature range .............................-65 c to +150 c junction temperature ......................................................+150 c lead temperature (soldering, 10s) .................................+300 c electrical characteristics (v+ = +2.7v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (notes 2, 3) parameter sym b o l conditions min typ max units rx interface t a = +25 c59 on-resistance r on v+ = 3v, i com_ = 10ma, v no_ or v nc_ = 1.5v t a = t min to t max 10 ? t a = +25 c 1.0 on-resistance match between channels (note 4) ? r on v+ = 3v, i com_ = 10ma, v no_ or v nc_ = 1.5v t a = t min to t max 1.3 ? t a = +25 c 2.0 3.0 on-resistance flatness (note 4) r flat ( on ) v+ = 3v; i com_ = 10ma; v no_ or v nc_ = 1.0v, 1.5v, 2.0v t a = t min to t max 3.4 ? tx interface t a = +25 c 0.7 0.9 on-resistance (note 5) r on v + = 3v , i c om _ = 100m a, v n o_ or v n c _ = 1.5v t a = t min to t max 1.0 ? t a = +25 c 0.03 0.150 on-resistance match between channels (notes 3, 5) ? r on v + = 3v , i c om _ = 100m a, v n o_ or v n c _ = 1.5v t a = t min to t max 0.175 ? t a = +25 c 0.1 0.18 on-resistance flatness (notes 5, 6) r flat ( on ) v+ = 3v; i com_ = 100ma; v no_ or v nc_ = 1.0v, 1.5v, 2.0v t a = t min to t max 0.2 ? note 1: signals on no_, nc_, com_ exceeding v+ or gnd are clamped by internal diodes. limit forward-diode current to maximum current rating.
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch _______________________________________________________________________________________ 3 electrical characteristics (continued) (v+ = +2.7v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (notes 2, 3) parameter sym b o l conditions min typ max units no_ or nc_ off-leakage current i no ( off ), i nc ( off ) v + = 3.6v ; v c om _ = 0.3v , 3.3v ; v n o_ or v n c _ = 0.3v , 3.3v -1 +1 a com_ on-leakage current i com ( on ) v+ = 3.6v; v com_ = 0.3v, 3.3v; v no_ or v nc_ = 0.3v, 3.3v or floating -1 +1 a dynamic characteristics t a = +25 c 400 turn-on time t on v n o_ or v n c _ = 1.5v , r l = 50 ? , c l = 35p f, fi g ur e 2 t a = t min to t max 750 ns t a = +25 c 200 turn-off time t off v no or v nc = 1.5v, r l = 50 ? , c l = 35pf, figure 2 t a = t min to t max 750 ns break-before-make delay t d r l = 50 ? , c l = 35pf, figure 3 80 ns rx interface 8 charge injection q v ge n = 1.5v, r ge n = 0 ? , c l = 1nf, fi gur e 4 tx interface 20 pc rx interface 300 on-channel 3db bandwidth bw tx interface 300 mhz v iso1 r l = 50 ? , c l = 35pf, f < 3mhz -65 v iso2 rx interface r l = 50 ? , c l = 35pf, 3mhz < f < 30mhz -58 v iso1 r l = 50 ? , c l = 35pf, f < 3mhz -60 off-isolation (note 7) v iso2 tx interface r l = 50 ? , c l = 35pf, 3mhz < f < 30mhz -40 db v ct1 r l = 50 ? , c l = 35pf, f < 3mhz -65 v ct2 rx interface, figure 5 r l = 50 ? , c l = 35pf, 3mhz < f < 30mhz -50 v ct1 r l = 50 ? , c l = 35pf, f < 3mhz -78 crosstalk (note 8) v ct2 tx interface, figure 5 r l = 50 ? , c l = 35pf, 3mhz < f < 30mhz -30 db c offrx rx interface f = 1mhz, figure 6 12 nc_ or no_ off-capacitance c offtx tx interface f = 1mhz, figure 6 40 pf c c om ( on ) tx rx interface 24 com_ on-capacitance c c om ( on ) rx f = 1mhz tx interface 60 pf
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 4 _______________________________________________________________________________________ electrical characteristics (continued) (v+ = +2.7v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c, unless otherwise noted.) (notes 2, 3) parameter sym b o l conditions min typ max units digital i/o (in_, switch ) input-low voltage v il v+ = 2.7v 0.5 v input-high voltage v ih v+ = 3.6v 1.4 v input leakage current i il v in_ = 0 or v+, v s w i t c h = 0 or v+ -1 +1 a supply operating voltage range v+ 2.7 3.6 v supply current i+ v+ = 3.6v, v in_ = v s w i t c h = 0 or v+ 10 a note 2: the algebraic convention is used in this data sheet. the most negative value is shown in the minimum column. note 3: devices are 100% tested at hot and room and guaranteed by design at cold. note 4: ? r on = r on(max) - r on(min) . note 5: guaranteed by design. note 6: flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. note 7: off-isolation = 20log 10 [v com_ / (v no_ or v nc_ )], v com_ = output, v no_ or v nc_ = input to off switch. note 8: crosstalk between any two switches. typical operating characteristics (v+ = 3.0v, t a = +25 c, unless otherwise noted.) on-resistance vs. com_voltage (tx interface) max4670 toc01 v com_ (v) on-resistance ( ? ) 3.0 1.2 1.8 2.4 0.6 0.6 0.7 0.8 0.9 0.5 03.6 v+ = 3v v+ = 2.7v v+ = 3.6v on-resistance vs. com_ voltage over temperature (tx interface) max4670 toc02 v com_ (v) on-resistance ( ? ) 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0.2 0.4 0.6 0.8 1.0 1.2 0 0 3.0 t a = +85 c t a = +25 c t a = -40 c on-resistance vs. com_voltage (rx interface) max4670 toc03 v com_ (v) on-resistance ( ? ) 3.0 1.2 1.8 2.4 0.6 4 5 6 7 8 9 10 3 0 3.6 v+ = 3.6v v+ = 2.7v v+ = 3v
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch _______________________________________________________________________________________ 5 on-resistance vs. com_ voltage over temperature (rx interface) max4670 toc04 v com_ (v) on-resistance ( ? ) 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 2 4 6 8 10 12 0 0 3.0 t a = +85 c t a = +25 c t a = -40 c 10 0.01 -40 35 85 com_ leakage current vs. temperature (tx interface) 0.1 1 max4670toc05 temperature ( c) leakage current (na) -15 60 10 10 0.01 -40 35 85 nc_/no_ leakage current vs. temperature (tx interface) 0.1 1 max4670toc06 temperature ( c) leakage current (na) -15 60 10 nc_ no_ com_ leakage current vs. temperature (rx interface) max4670 toc07 temperature ( c) leakage current (na) 60 35 10 -15 0.1 1 10 0.01 -40 85 nc_/no_ leakage current vs. temperature (rx interface) max4670 toc08 temperature ( c) leakage current (na) 60 35 10 -15 0.1 1 10 0.01 -40 85 nc_ no_ turn-on time vs. supply voltage (tx interface) max4670 toc09 supply voltage (v) turn-on time (ns) 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 130 160 190 220 250 280 100 2.7 3.6 typical operating characteristics (continued) (v+ = 3.0v, t a = +25 c, unless otherwise noted.)
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 6 _______________________________________________________________________________________ turn-on/off times vs. temperature (rx interface) max4670 toc14 temperature ( c) turn-on/off times (ns) 60 35 10 -15 10 20 30 40 50 60 0 -40 85 t on t off charge injection vs. com_ voltage (tx interface) max4670 toc15 v com (v) charge injection (pc) 2.5 2.0 1.5 1.0 0.5 30 60 90 120 150 0 0 3.0 charge injection vs. com_ voltage (rx interface) max4670 toc16 v com_ (v) charge injection (pc) 2.5 2.0 1.5 1.0 0.5 2 4 6 8 10 12 0 0 3.0 frequency response (tx interface) frequency (mhz) on loss (db) max4670 toc17 -140 -120 -100 -80 -60 -40 -20 0 20 0.1 1 10 100 1000 on loss off-isolation off-isolation crosstalk frequency response (rx interface) frequency (mhz) on loss (db) max4670 toc18 -140 -120 -100 -80 -60 -40 -20 0 20 0.1 1 10 100 1000 on loss off-isolation off-isolation crosstalk typical operating characteristics (continued) (v+ = 3.0v, t a = +25 c, unless otherwise noted.) turn-off time vs. supply voltage (tx interface) max4670 toc10 supply voltage (v) turn-off time (ns) 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 10 20 30 40 50 60 0 2.7 3.6 turn-on time vs. temperature (tx interface) max4670 toc12 temperature ( c) turn-on time (ns) 60 35 10 -15 150 175 200 250 300 350 225 275 325 375 125 400 100 -40 85 v+ = 3v turn-on/off times vs. supply voltage (rx interface) max4670 toc11 supply voltage (v) turn-on/off times (ns) 3.4 3.3 3.2 3.1 3.0 2.9 2.8 65 70 75 80 85 90 95 60 2.7 3.5 3.6 t on t off turn-off time vs. temperature (tx interface) max4670 toc13 temperature ( c) turn-off time (ns) 60 35 10 -15 22 24 28 32 36 26 30 34 38 40 20 -40 85 v+ = 3v
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch _______________________________________________________________________________________ 7 pin name function n.c. no connection. not internally connected. 1 inb transmitter 1 logic control. drive inb high to connect nc3 and nc4. inb logic is ignored when switch asserts low. 2 com3 common terminal 3. transmitter 1 positive differential terminal. connect com3 to the transmit interface transformer. 3 com4 common terminal 4. transmitter 1 negative differential terminal. connect com4 to the transmit interface transformer. 4 gnd ground 5inc transmitter 2 logic control. drive inc high to connect nc5 and nc6. inc logic is ignored when switch asserts low. 6 com5 common terminal 5. transmitter 2 positive differential terminal. connect com5 to the transmit interface transformer. 7 com6 common terminal 6. transmitter 2 negative differential terminal. connect com6 to the transmit interface transformer. 8 switch protection switch control. assert switch low to connect all switches to protection bus. when switch asserts low, switch overrides all in_ inputs. assert switch high to enable all switches and let the respective in control the switches. 9, 32 v+ positive supply voltage. bypass v+ to ground with a 0.1f ceramic capacitor. 10 ind receiver 2 logic control. drive ind high to connect nc7 and nc8. ind logic is ignored when switch asserts low. 11 com7 common terminal 7. receiver 2 positive differential terminal. connect com7 to the receive interface transformer. 12 com8 common terminal 8. receiver 2 negative differential terminal. connect com8 to the receive interface transformer. 13 no8 normally open terminal 8. receiver 2 differential protection terminal. connect no8 to the protection bus. 14 nc8 normally closed terminal 8. receiver 2 differential terminal. connect nc8 to liu receiver. 15 no7 normally open terminal 7. receiver 2 differential protection terminal. connect no7 to the protection bus. 16 nc7 normally closed terminal 7. receiver 2 differential terminal. connect nc7 to liu receiver. 17 no6 normally open terminal 6. transmitter 2 differential protection terminal. connect no6 to the protection bus. 18 nc6 normally closed terminal 6. transmitter 2 differential terminal. connect nc6 to liu receiver. 19 no5 normally open terminal 5. transmitter 2 differential protection terminal. connect no5 to the protection bus. 20 nc5 normally closed terminal 5. transmitter 2 differential terminal. connect nc5 to liu receiver. 21 no4 normally open terminal 4. transmitter 1 differential protection terminal. connect no4 to the protection bus. pin description
max4670 detailed description the max4670 is a quad-dpdt/octal-spdt analog switch optimized for t1/e1/j1 line-card redundancy protection applications. this analog switch is configurable as two differential transmitter and receiver pairs utilized in t1/e1/j1 redundancy architecture. the max4670 has four low 0.7 ? on-resistance switches with 60pf and 40pf on- and off-capacitances, respec- tively, for interfacing to the liu transmitter inputs. the max4670 also includes four 5 ? on-resistance switches with low 24pf and 12pf on- and off-capacitances, respectively, for interfacing to the liu receiver inputs. the max4670 replaces two diode arrays or two tran- sient voltage suppressors and four dual-spdt relays, significantly reducing board space and simplifying pc board routing. the max4670 pinouts are targeted for t1/e1/j1 applications, resulting in a simplified layout when interfacing with standard line transformers and lius. figure 1 is the functional diagram. logic inputs (in_, switch ) the max4670 four logic inputs (in_) control the switches in pairs and contain a global logic input ( switch ) that connects all coms to their respective no_ inputs. switch overrides all in_ inputs when asserted low, thus connecting all no_ to com_ outputs (transmitter/receiver pairs to the protection bus). when switch asserts high, in_ controls the switch pairs. see table 1. surge protection the max4670 includes chip-side, surge-protection capa- bility for short-haul intrabuilding applications. the low- capacitance diodes suppress surge residuals from the primary, line-side protection devices. it is assumed that adequate primary protection is included on the line die of the transformer, as represented in figures 7 10. table 2 lists the applicable surge protection setups for e1 interfaces. the max4670 surge test was performed per iec 61000-4-5 class 2 specifications and passed at 1kv with only an in-line transformer and primary surge sup- pressor. the transformer was a halo tg83-1505nx trans- former and the surge suppressor was a teccor p0640sc. applications information redundancy architecture figures 7 through 10 illustrate the max4670 used in two different redundancy architectures. there is one back- up card for up to n line cards in the system (in this example, n = 3). in the event one of the line cards fails (memory failure, power supply went down, etc.), a sys- tem supervisory card issues a command to the switch- es to reroute the traffic to and from the problem line card to the backup line card. integrated t1/e1/j1 short-haul and long-haul protection switch 8 _______________________________________________________________________________________ pin name function 22 nc4 normally closed terminal 4. transmitter 1 differential terminal. connect nc4 to liu receiver. 23 no3 normally open terminal 3. transmitter 1 differential protection terminal. connect no3 to the protection bus. 24 nc3 normally closed terminal 3. transmitter 1 differential terminal. connect nc3 to liu receiver. 25 no2 n or m al l y op en ter m i nal 2. recei ver 2 differential protection terminal. c onnect no2 to the p r otecti on b us. 26 nc2 normally closed terminal 2. receiver 1 differential terminal. connect nc2 to liu receiver. 27 no1 n or m al l y op en ter m i nal 1. recei ver 1 differential protection terminal. c onnect no1 to the p r otecti on b us. 28 nc1 normally closed terminal 1. receiver 1 differential terminal. connect nc1 to liu receiver. 29 com1 common terminal 1. receiver 1 positive differential terminal. connect com1 to the receive interface transformer. 30 com2 common terminal 2. receiver 1 negative differential terminal. connect com2 to the receive interface transformer. 31 ina receiver 1 logic control. drive ina low to connect receiver 1 to the liu. ina logic is ignored when switch asserts low. ep ep exposed paddle. connect ep to gnd or leave unconnected. pin description (continued)
in a switching-card architecture, a common switching card contains all the protection switches for the t1/e1/j1 lines entering the system (see figures 7 and 8). with an adjacent card architecture, the switches pro- tecting any given line card reside physically in the adja- cent line card (see figures 9 and 10). receive and transmit interfaces reside in the same board for each t1/e1/j1 port. the diagrams represent the typical interface transformers and resistors recom- mended for dallas/maxim lius, such as the ds21q55. the protection switches are placed in the low-voltage side of the transformer to meet the isolation require- ments. note that there is also a tvs in the line side of the transformers. the receive and transmit resistors pro- vide impedance matching to the t1/e1/j1 transmission cable characteristic impedance. refer to application note 2857 for more information on t1/e1/j1 applications. max4670 integrated t1/e1/j1 short-haul and long-haul protection switch _______________________________________________________________________________________ 9 max4670 no1 r x nc1 com1 no2 r x nc2 com2 ina inb inc ind no3 t x nc3 com3 no4 t x nc4 com4 no5 t x nc5 com5 no6 t x nc6 com6 no7 r x nc7 com7 no8 r x nc8 com8 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? v+ gnd switch ina nc1/nc2 no1/no2 low x off on high low off on high high on off inb nc3/nc4 no3/no4 low x off on high low off on high high on off inc nc5/nc6 no5/no6 low x off on high low off on high high on off ind nc7/nc8 no7/no8 low x off on high low off on high high on off switch figure 1. functional diagram
max4670 liu interface recommendations the max4670 low 0.7 ? (typ) on-resistance is ade- quate, even in applications where the lius require no external series transmit resistors (rt = 0 in figures 8 and 10). however, in some instances, increase the liu output amplitude to compensate for r on if the liu sup- ports programmable output amplitude. with lius requiring external transmit resistors, it is recommended to reduce rt by the amount of the typical r on with lius requiring external transmit resistors. for example, if the liu vendor recommends rt = 9.1 ? , the actual value in the application should be: rt = rt r on = 9.1 ? - 0.7 = 8.4 ? the receive interface series resistance is small enough to support lius with internal line termination, provided the external 120 ? parallel resistor combination (rr) is connected, as shown in figures 7 and 9. while in normal operation, the max4670 requires the input and output signals to be within the v+ and gnd supply rails. esd test conditions esd performance depends on a variety of conditions. contact maxim for a reliability report that documents test setup, test methodology, and test results. human body model figure 11 shows the human body model. figure 12 shows the current waveform it generates when dis- charged into a low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the test device through a 1.5k ? resistor. iec 1000-4-2 the iec 1000-4-2 standard covers esd testing and performance of finished equipment. it does not specifi- cally refer to ics. the major difference between tests done using the human body model and iec 1000-4-2 is a higher peak current in iec 1000-4-2, because series resistance is lower in the iec 1000-4-2 model. hence, the esd withstands voltage measured to iec 61000-4-2, and is generally lower than that measured using the human body model. figure 13 shows the iec 61000-4-2 model, and figure 14 shows the current waveform for the 8kv iec, 61000-4-2 level 4, esd contact discharge test. the air-gap test involves approaching the device with a charged probe. the contact discharge method connects the probe to the device before the probe is energized. machine model the machine model for esd tests all pins using a 200pf storage capacitor and zero discharge resis- tance. its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. integrated t1/e1/j1 short-haul and long-haul protection switch 10 ______________________________________________________________________________________ table 1. max4670 truth table switch ina nc1/nc2 no1/no2 low x off on high low off on high high on off inb nc3/nc4 no3/no4 low x off on high low off on high high on off inc nc5/nc6 no5/nc6 low x off on high low off on high high on off ind nc7/nc8 no7/no8 low x off on high low off on high high on off table 2. iec 61000-4-5 test conditions test configuration test conditions differential surge (line to line) 500v peak, 12a min current, 8s/20s surge common-mode surge (line to gnd) 1000v peak, 24a min current, 8s/20s surge
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ______________________________________________________________________________________ 11 t r < 5ns t f < 5ns 50% v inl logic input r l 50 ? com_ gnd in_ c l includes fixture and stray capacitance. v out = v n_ ( r l ) r l + r on where, v n_ is v nc_ or v no_ . v inh t off 0v no_ or nc_ v no_ or v nc_ 0.9 v 0ut 0.9 v out t on v out switch output logic input logic input waveforms inverted for switches that have the opposite logic sense. v+ c l 35pf v out max4670 0.1 f v+ figure 2. switching time 50% v inh v inl logic input v out 0.9 v out t d logic input r l 50 ? gnd c l includes fixture and stray capacitance. no_ in_ nc_ v out v+ c l 35pf v no_ or v nc_ com_ max4670 0.1 f v+ figure 3. break-before-make intervals test circuits/timing diagrams v out in_ off on off ? v out q = ( ? v out )(c l ) in depends on switch configuration; input polarity determined by sense of switch. off on off in_ max4670 v gen gnd com_ c l v out v+ nc_ or no_ v inl to v inh r gen in_ 0.1 f v+ figure 4. charge injection
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 12 ______________________________________________________________________________________ capacitance meter nc_ or no_ com_ gnd in_ v inl or v inh 0.1 f v+ f = 1mhz v+ max4670 figure 6. channel off-/on-capacitance test circuits/timing diagrams (continued) measurements are standardized against shorts at ic terminals. off-isolation is measured between com_ and "off" no_ or nc_ terminal on each switch. on-loss is measured between com_ and "on" no_ or nc_terminal on each switch. crosstalk is measured from one channel to all other channels. signal direction through switch is reversed; worst values are recorded. +3v v out v+ in_ nc_ no_ com_ v in max4670 off-isolation = 20log v out v in on-loss = 20log v out v in crosstalk = 20log v out v in network analyzer 50 ? 50 ? 50 ? 50 ? meas ref 0.1 f 0 or v+ 50 ? gnd figure 5. on-loss, off-isolation, and crosstalk
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ______________________________________________________________________________________ 13 com1 com2 u1 1:1 u1 1:1 u2 1:1 nc1 no1 nc2 no2 line card 1 rtip rring liu r x com7 com8 nc7 no7 nc8 no8 line card 2 rtip rring liu r x com7 com8 nc7 no7 nc8 no8 line card 3 rtip rring liu r x backup line card rtip rring liu r x protection switching card protection bus rr rr rr rr rr rr figure 7. switching-card-architecture receive path receive path
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 14 ______________________________________________________________________________________ com3 com4 no3 nc3 no4 nc4 line card 1 tring ttip liu t x protection switching card protection bus r t r t com5 com6 no5 nc5 no6 nc6 line card 2 tring ttip liu t x r t r t com5 com6 no5 nc5 no6 nc6 line card 3 tring ttip liu t x r t r t backup line card ttip tring liu t x u1 1:1 u1 1:1 u2 1:1 figure 8. switching-card-architecture transmit path transmit path
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ______________________________________________________________________________________ 15 1:1 com1 rr rr rr rr rr rr no1 com2 no2 max4670 rtip rring liu r x line card 1 1:1 com1 no1 com2 no2 max4670 rtip rring liu r x line card 2 1:1 com1 no1 com2 no2 max4670 rtip rring liu r x line card 3 rtip rring liu r x backup line card protection bus figure 9. adjacent-card-architecture receive path receive path
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 16 ______________________________________________________________________________________ 1:2 r t r t com3 no3 com4 no4 max4670 ttip tring liu tx line card 1 1:2 r t r t com3 no3 com4 no4 max4670 ttip tring liu tx line card 2 1:2 r t r t com3 no3 com4 no4 max4670 ttip tring liu tx line card 3 r t r t rtip rring liu tx backup line card protection bus figure 10. adjacent-card-architecture transmit path transmit path
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ______________________________________________________________________________________ 17 charge-current- limit resistor discharge resistance storage capacitor c s 100pf r c 1m ? r d 1500 ? high- voltage dc source device under test figure 11. human body esd test model i p 100% 90% 36.8% t rl time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amperes figure 12. human body model current waveform charge-current- limit resistor discharge resistance storage capacitor c s 150pf r c 50m ? to 100m ? r d 330 ? high- voltage dc source device under test figure 13. iec 1000-4-2 esd test model t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i figure 14. ied 1000-4-2 esd generator current waveform
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch 18 ______________________________________________________________________________________ chip information process: cmos max4670 no1 r x nc1 com1 no2 r x nc2 com2 ina inb inc ind no3 t x nc3 com3 no4 t x nc4 com4 no5 t x nc5 com5 no6 t x nc6 com6 no7 r x nc7 com7 no8 r x nc8 com8 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? 0.6 ? v+ gnd switch ina nc1/nc2 no1/no2 low x off on high low off on high high on off inb nc3/nc4 no3/no4 low x off on high low off on high high on off inc nc5/nc6 no5/no6 low x off on high low off on high high on off ind nc7/nc8 no7/no8 low x off on high low off on high high on off switch functional diagram/truth table
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch ______________________________________________________________________________________ 19 package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) qfn thin.eps
max4670 integrated t1/e1/j1 short-haul and long-haul protection switch maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2006 maxim integrated products is a registered trademark of maxim integrated products, inc. maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2005 maxim integrated products is a registered trademark of maxim integrated products, inc. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
e nglish ? ???? ? ??? ? ??? what's ne w p roducts solutions de sign ap p note s sup p ort buy comp any me mbe rs max4670 part number table notes: see the max4670 quickview data sheet for further information on this product family or download the max4670 full data sheet (pdf, 1.1mb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming c onventions . 4. * some packages have variations, listed on the drawing. "pkgc ode/variation" tells which variation the product uses. 5. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max4670etj thin qfn;32 pin;5x5x0.8mm dwg: 21-0140k (pdf) use pkgcode/variation: t3255-4 * -40c to +85c rohs/lead-free: no materials analysis MAX4670ETJ-T thin qfn;32 pin;5x5x0.8mm dwg: 21-0140k (pdf) use pkgcode/variation: t3255-4 * -40c to +85c rohs/lead-free: no materials analysis max4670etj+ thin qfn;32 pin;5x5x0.8mm dwg: 21-0140k (pdf) use pkgcode/variation: t3255+4 * -40c to +85c rohs/lead-free: yes materials analysis max4670etj+t thin qfn;32 pin;5x5x0.8mm dwg: 21-0140k (pdf) use pkgcode/variation: t3255+4 * -40c to +85c rohs/lead-free: yes materials analysis didn't find what you need? c ontac t us: send us an email c opyright 2 0 0 7 by m axim i ntegrated p roduc ts , dallas semic onduc tor ? legal n otic es ? p rivac y p olic y

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