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fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch ? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 rev. 1.0.6 january 2007 fsusb31 low-power 1-port hi-speed usb 2.0 (480mbps) switch features low on capacitance, 3.7pf (typical) low on resistance, 6.5 (typical) low power consumption (1a maximum) ? 10a maximum i cct over and expanded control voltage range (v in = 2.6v, v cc = 4.3v) wide -3db bandwidth, > 720mhz 8k i/o to gnd esd protection power off protection when v cc = 0v, d+ / d- pins can tolerate up to 4.3v packaged in: ? pb-free 8-lead micropak? (1.6 x 1.6mm) ? pb-free 8-lead us8 applications cell phone, pda, digital camera, and notebook lcd monitor, tv, and set-top box related application notes an-6022 using the fsusb30/31 to comply with usb 2.0 fault condition requirements description the fsusb31 is a low-power, single-port, high-speed usb 2.0 switch. this part is configured as a single pole, single-throw switch and is opt imized for switching or iso- lating a high-speed (480mbps) source or a high-speed and full-speed (12mbps) source. the fsusb31 is com- patible with the requirements of usb2.0 and features an extremely low on capacitance (c on ) of 3.7pf. the wide bandwidth of this device (>720mhz) exceeds the band- width needed to pass the third harmonic, resulting in sig- nals with minimum edge and phase distortion. superior channel-to-channel crosstalk minimizes interference. the fsusb31 contains special circuitry on the d+ / d- pins that allows the device to withstand an over-voltage condition. this device is also designed to minimize cur- rent consumption even when the control voltage applied to the oe pin is lower than the supply voltage (v cc ). this feature is especially valuab le for ultra-portable applica- tions such as cell phones, allowing for direct interface with the general purpose i/os of the baseband proces- sor. other applications incl ude port isolation and switch- ing in portable cell phones, pdas, digital cameras, printers, and notebook computers. ordering information pb-free package per jedec j-std-020b. application diagram figure 1. typical application diagram part number package pb-free package description fsusb31k8x mab08a yes 8-lead us8, jedec mo-187, variation ca 3.1mm wide fsusb31l8x mac08a yes 8-lead micropak, 1.6mm wide base band processor or fs usb controller hs usb controller v cc usb connector fsusb31 d+ d? oe micropak ? is a trademark of fairchild semiconductor corporation.
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 2 connection diagrams figure 2. pin assignments for micropak figure 3. pin assignments for us8 pin descriptions truth table analog symbol figure 4. analog symbol pin name description oe bus switch enable d+, d ? , hsd+, hsd ? data ports nc no connect oe function high disconnect low d+, d ? = hsd 7 g 65 4 8 2 v cc 13 gnd oe hsd+ d+ nc hsd? d? v cc nc hsd? d? gnd oe hsd+ d+ 8 7 6 5 1 2 3 4 hsd+ d+ oe control hsd? d?
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 3 absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. in addi- tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. recommended oper ating conditions the recommended operating conditions table defines the conditions for actual dev ice operation. recommended operating conditions are specified to ensure optimal perfor mance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. notes: 1. the input and output negative voltage ratings may be ex ceeded if the input and output diode current ratings are observed. dc switch voltage may never exceed 4.6v. 2. control input must be held high or low and it must not float. symbol parameter minimum maximum unit v cc supply voltage -0.5v 4.6 v v s dc input voltage (1) -0.5v 4.6 v v in dc switch voltage (1) hsd -0.5v v cc +0.3 v d + , d ? -0.5 +4.6 v i ik dc input diode current -50 ma i out dc output current 50 ma t stg storage temperature -65 +150 c esd human body model all pins 7.5 kv i/o to gnd 8 kv symbol parameter mi nimum maximum unit v cc supply voltage 3.0 4.3 v v in control input voltage (2) 0v v cc v switch input voltage 0v v cc v t a operating temperature -40 +85 c
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 4 dc electrical characteristics all typical values are at 25c unless otherwise specified. notes : 3. measured by the voltage drop between dn, hsd, and dn pins at the indicated current through the switch. on resistance is determined by the lower of the voltage on the two ports. 4. guaranteed by characterization. ac electrical characteristics all typical values are for v cc = 3.3v are at 25c unl ess otherwise specified. symbol parameter conditions v cc (v) t a = ? 40c to +85c unit min. typ. max. v ik clamp diode voltage i in = ? 18ma 3.0 -1.2 v v ih input voltage high 3.0 to 3.6 1.3 v 4.3 1.7 v il input voltage low 3.0 to 3.6 0.5 v 4.3 0.7 i in control input leakage v in = 0v to v cc 4.3 -1.0 1.0 a i oz off state leakage 0 hsd v cc 4.3 -2.0 2.0 a i off power off leakage current (d+, d?) v in = 0.0v to 4.3v, v cc = 0v 0-2.0 2.0 a r on switch on resistance (3) v in = 0.4v, i on = ? 8ma 3.0 6.5 10.0 r on delta r on (4) v in = 0.4v, i on = ? 8ma 3.0 0.35 r on flatness r on flatness (3) v in = 0.0v ? 1.0v, i on = ? 8ma 3.0 2.0 i cc quiescent supply current v in = 0.0v or v cc , i out = 0 4.3 1.0 a i cct increase in i cc current per control voltage and v cc levels v in = 2.6v, v cc = 4.3v 4.3 10.0 a symbol parameter conditions v cc (v) t a = ? 40c to +85c unit figure number min. typ. max. t on turn-on time, oe to output v in = 0.8v, r l = 50 , c l = 5pf 3.0 to 3.6 15.0 30.0 ns figure 12 t off turn-off time, oe to output v in = 0.8v, r l = 50 , c l = 5pf 3.0 to 3.6 12.0 25.0 ns figure 12 t pd propagation delay (4) r l = 50 , c l = 5pf 3.3 0.25 ns figure 10 figure 11 t bbm break-before-make r l = 50 , c l = 5pf, v in = 0.8v 3.0 to 3.6 2.0 6.5 ns figure 13 o irr off isolation (non-adjacent) r t = 50 , f = 240mhz 3.0 to 3.6 -35.0 db figure 16 xtalk non-adjacent channel crosstalk r t = 50 , f = 240mhz 3.0 to 3.6 -55.0 db figure 17 bw -3db bandwidth r t = 50 , c l = 0pf 3.0 to 3.6 720 mhz figure 15 r t = 50 , c l = 5pf 550
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 5 usb hi-speed related ac electrical characteristics note : 5. guaranteed by design. capacitance symbol parameter conditions v cc (v) t a = ? 40c to +85c unit figure number min. typ. max. t sk(o) channel-to-chan- nel skew (5) c l = 5pf 3.0 to 3.6 50.0 ps figure 10 figure 14 t sk(p) skew of opposite transitions of the same output (5) c l = 5pf 3.0 to 3.6 20.0 ps figure 10 figure 14 t j total jitter (5) r l = 50 , c l = 5pf, t r = t f = 500ps at 480 mbps (prbs = 2 15 ? 1) 3.0 to 3.6 200 ps symbol parameter conditions t a = ? 40c to +85c unit figure number min. typ. max. c in control pin input capacitance v cc = 0v 1.0 pf figure 19 c on d1 n , d2 n , dn on capacitance v cc = 3.3, oe = 0v 3.7 pf figure 18 c off d1 n , d2 n off capacitance v cc and oe = 3.3 1.7 pf figure 19
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 6 typical characteristics figure 5. gain vs. frequency figure 6. off isolation figure 7. crosstalk -8 -7 -6 -5 -4 -3 -2 -1 0 1 10 100 1000 10000 frequency (mhz) 1 10 100 1000 frequency (mhz) gain (db) -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 off isolation (db) c l = 0pf v cc = 3.3v v cc = 3.3v 1 10 100 1000 frequency (mhz) -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 crosstalk (db) v cc = 3.3v
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 7 test diagrams figure 8. on resistan ce figure 9. off leakage figure 10. ac test circuit load figure 11. switch propagation delay waveforms (t pd ) figure 12. turn on / turn off waveform (t on / t off ) gnd hsd i on v on v in id n(off) v s = 0 or v cc fsusb31 nc a gnd gnd v in dn oe v s = 0 to v cc fsusb31 each switch port is tested separately. r on = v on / i on oe t rise = 500ps t plh hsd+, hsd? input: output: d+, d? t fall = 500ps v oh r l r s c l * hsd v in v oe d+, d? fsusb31 gnd 90% 50% 50% 90% 10% 10% 50% gnd gnd t phl 50% v ol 800mv 400mv v out r l , r s , and c l are functions of the application environment (see ac electrical tables for specific values). *c l includes test fixture and stray capacitance. t rise = 2.5ns t on t off input ? oe output ? v out t fall = 2.5ns v oh 90% v cc /2 v cc /2 90% 10% 10% 90% 90% v ol v cc gnd
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 8 test diagrams (continued) figure 13. break-before-make (t bbm ) figure 14. switch skew tests figure 15. bandwidth t d t r = t f = 2.5ns (10?90%) r l s c l * hsdn hsdn v o control input d+, d? gnd control input 50% v cc 0v v out v out v cc v cc 0.9 x v out *c l includes test fixture and stray capacitance. t rise = 500ps t plh t phl nput: o utput: d+, d? hsdn+ hsdn? t fall = 500ps v oh 90% 90% 50% 50% 10% 10% 50% 50% v ol 800mv t sk(p) = | t phl ? t plh | pulse skew, t sk(p) 400mv t rise = 500ps t plh1 t phl1 output1: input: d+, d? output1: d2+, d2? hsd1+ hsd1? t fall = 500ps v oh 90% 90% 50% 50% 10% 10% 50% 50% v ol 800mv t sk(o) = | t plh1 ? t plh2 | or | t phl1 ? t phl2 | output skew, t sk(out) 400mv t plh2 t phl2 v oh 50% 50% v ol r s v in fsusb31 gnd v oe network analyzer v out gnd v s gnd r t gnd gnd r s and r t are functions of the application environment (see ac electrical tables for specific values).
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 9 test diagrams (continued) figure 16. channel off isolation figure 17. non-adjacent ch annel-to-channel crosstalk figure 18. channel on capacitance f igure 19. channel off capacitance r t r s v in fsusb31 gnd network analyzer v out gnd v s gnd gnd off-isolation = 20 log (v out / v in ) r t gnd gnd v oe r t r s v in fsusb31 gnd network analyzer v out gnd nc v s gnd gnd r s and r t are functions of the application environment (50, 75 or 100 ). crosstalk = 20 log (v out / v in ) r t gnd gnd v oe fsusb31 dn capacitance meter f = 240mhz hsdn fsusb31 dn capacitance meter f = 240mhz v oe = 0 or v cc hsdn oe v oe = 0 or v cc oe
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 10 application guidance: meeting usb 2.0 vbus short requirements in section 7.1.1 of the usb 2. 0 specification, it notes that usb devices must be able to withstand a vbus short to d+ or d- when the usb devices is either powered off or powered on. the fsusb31 can be successfully config- ured to meet both these requirements. power-off protection for a vbus short circuit, the switch is expected to with- stand such a condition for at least 24 hours. the fsusb31 has specially designed circuitry which pre- vents unintended signal bleed through as well as guar- anteed system reliability duri ng a power-down, over- voltage condition. the protection has been added to the common pins (d+, d-). power-on protection the usb 2.0 specification also notes that the usb device should be capable of withstanding a vbus short during transmission of data. fairchild recommends add- ing a 100 series resister betw een the switch vcc pin and supply rail to protect against this case. this modifi- cation works by limiting curre nt flow back into the vcc rail during the over-voltage event so current remains within the safe operating range. in this application, the switch passes the full 5.25v input signal through to the selected output, while maintaining specified off isolation on the un-selected pins. d+ = 5.25v v cc = 3.6 v 100 ohms fsusb31 d- = 5.25v hsd+ hsd- figure 20. a 100 resistor in series with the v cc supply allows the fsusb31 to withstand a vbus short when powered up for more information, see applications note an-6022 using the fsusb30/fsusb31 to comply with usb 2.0 fault condition requirements at www.fairchildsemi.com
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 11 tape and reel specification tape format for mircopak tape dimension dimensions are in millimeter s unless otherwise specified. package designator tape section number cavities cavity status cover tape status l8x leader (start end) 125 (typ) empty sealed carrier 5000 filled sealed trailer (hub end) 75 (typ) empty sealed
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.5 12 reel dimensio n for mircopak dimensions are in inches (millimet ers) unless otheriwise specified. tape sizeabcdn w1 w2 w3 (8mm) 7.0 (177.8) 0.059 (1.50) 0.512 (13.00) 0.795 (20.20) 2.165 (55.00) 0.331 + 0.059/ ? 0.000 (8.40 + 1.50/ ? 0.00) 0.567 (14.40) w1 + 0.078/ ? 0.039 (w1 + 2.00/ ? 1.00)
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 13 physical dimensions dimensions are in millimet ers unless otherwise noted. figure 21. pb-free, 8-lead us8, je dec mo-187, variation ca 3.1mm wide
? 2006 fairchild semiconductor corporation www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6 14 physical dimensions (continued) dimensions are in millimet ers unless otherwise noted. figure 22. pb-free, 8-lead micropak, 1.6mm wide
? 2006 fairchild semiconductor corporation 15 www.fairchildsemi.com fsusb31 low-power 1-port hi-s peed usb 2.0 (480mbps) switch fsusb31 rev. 1.0.6

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