View AOZ8904_5317764.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

rev. 2.1 january 2011 www.aosmd.com page 1 of 11 AOZ8904 ultra-low capacitanc e tvs diode array general description the AOZ8904 is a transient voltage suppressor array designed to protect high spee d data lines from electro static discharge (esd) and lightning. this device incorporates eight surge rated, low capacitance steering diodes and a transient voltage suppressor (tvs) in a single package. during transient conditions, the steering dio des direct the transient to either the positive side of the power supply line or to ground. they may be used to meet the esd immunity requirements of iec 61000-4-2, level 4 (15kv air, 8kv contact discharge). the AOZ8904 comes in a halogen free and rohs compliant sot-23 and sc-70 packages. it is rated over a -40c to +85c ambient temperature range. features ? esd protection for high-speed data lines: ? exceeds: iec 61000-4-2 (esd) 24kv (air), 24kv (contact) ? iec 61000-4-5 (lightning) 4a (8/20s) ? human body model (hbm) 24kv ? small package saves board space ? low insertion loss ? protects four i/o lines ? low clamping voltage ? low operating voltage: 5.0v applications ? usb 2.0 power and data line protection ? video graphics cards ? monitors and flat panel displays ? digital video interface (dvi) typical application figure 1. 2 usb high speed ports +5v r t vbus AOZ8904 usb host controller downstream ports vbus d+ d- gnd r t +5v r t vbus d+ d- gnd r t
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 2 of 11 ordering information aos green products used reduced levels of halogens, and are also rohs compliant. please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information. pin configuration absolute maximum ratings exceeding the absolute maximum ratings may damage the device. notes: 1. iec 61000-4-2 discharge with c discharge = 150pf, r discharge = 330 ? . 2. human body discharge per mil-std-883, method 3015 c discharge = 100pf, r discharge = 1.5k ? . part number ambient temperature range package environmental AOZ8904cil -40c to +85c sot-23-6 rohs compliant green product AOZ8904hil sc-70-6 1 2 3 6 5 4 ch1 vn ch2 ch4 vp ch3 sot-23-6 / sc-70-6 (top view) parameter rating vp ? vn 6v peak pulse current (i pp ), t p = 8/20s 4a peak power dissipation (8 x 20s@ 25c) 50w storage temperature (t s ) -65c to +150c esd rating per iec61000-4-2, contact (1) 24kv esd rating per iec61000-4-2, air (2) 24kv esd rating per human body model (2) 24kv junction temperature (t j ) -40c to +125c
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 3 of 11 electrical characteristics t a = 25c unless otherwise specified notes: 3. these specifications are guaranteed by design. 4. the working peak reverse voltage, v rwm , should be equal to or greater than the dc or continuous peak operating voltage level. 5. v br is measured at the pulse test current i t . 6. measurements performed wi th no external capacitor on v p (pin 5 floating). 7. measurements performed with v p biased to 3.3 volts (pin 5 @ 3.3v). 8. measurements performed using a 100 nsec transmission line pulse (tlp) system. symbol parameter conditions min. typ. max. units v rwm reverse working voltage between pin 5 and 2 (4) 5.5 v v br reverse breakdown voltage i t = 1ma, between pins 5 and 2 (5) 6.6 v i r reverse leakage current v rwm = 5v, between pins 5 and 2 1 a v f diode forward voltage i f = 15ma 0.7 0.85 0.95 v v cl channel clamp voltage positive transients negative transient i pp = 1a, tp = 100ns, any i/o pin to ground (3)(6)(8) 11.00 -2.00 v v channel clamp voltage positive transients negative transient ipp = 5a, tp = 100ns, any i/o pin to ground (3)(6)(8) 14.00 -3.50 v v channel clamp voltage positive transients negative transient ipp = 12a, tp = 100ns, any i/o pin to ground (3)(6)(8) 18.00 -5.00 v v c j junction capacitance v r = 0v, f = 1mhz, any i/o pin to ground (3)(7) 1.25 1.3 pf c j channel input capacitance matching v r = 0v, f = 1mhz, between i/o pins (3)(7) 0.03 pf
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 4 of 11 typical performance characteristics i/o ? i/o insertion loss (s21) vs. frequency (vp = float) 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 frequency (mhz) insertion loss (db) 1 10 100 1000 100 10 1000 analog crosstalk (i/o?i/o) vs. frequency 20 0 -20 -40 -60 -80 frequency (mhz) insertion loss (db) clamping voltage vs. peak pulse current (tperiod = 100ns, tr = 1ns) 17 16 15 14 13 12 11 10 9 peak pulse current, i pp (a) clamping voltage, v cl (v) 024681012 forward voltage vs. forward current (tperiod = 100ns, tr = 1ns) 7 6 5 4 3 2 1 0 forward current, i pp (a) forward voltage (v) 024681012 i/o ? gnd insertion loss (s21) vs. frequency (vp = 3.3v) 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 frequency (mhz) insertion loss (db) 1 10 100 1000
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 5 of 11 application information the AOZ8904 tvs is design to protect four data lines from fast damaging transient over-voltage by clamping it to a reference. when the tr ansient on a protected data line exceed the reference voltage the steering diode is forward bias thus, conducting the harmful esd transient away from the sensitive circuitry under protection. pcb layout guidelines printed circuit board layout is the key to achieving the highest level of surge immunity on power and data lines. the location of the protection devices on the pcb is the simplest and most important design rule to follow. the AOZ8904 devices should be lo cated as close as possible to the noise source. the placement of the AOZ8904 devices should be used on all data and power lines that enter or exit the pcb at th e i/o connector. in most systems, surge pulses occur on data and power lines that enter the pcb through the i/o connector. placing the AOZ8904 devices as clos e as possible to the noise source ensures that a sur ge voltage will be clamped before the pulse can be coupled into adjacent pcb traces. in addition, the pcb should use the shortest possible traces. a short trace length equates to low impedance, which ensures t hat the surge energy will be dissipated by the AOZ8904 device. long signal traces will act as antennas to receive energy from fields that are produced by the esd pulse. by keeping line lengths as short as possible, the efficien cy of the line to act as an antenna for esd related fiel ds is reduced. minimize interconnecting line lengths by placing devices with the most interconnect as close together as possible. the protection circuits should shunt the surge voltage to either the reference or chassis ground. shunting the surge voltage directly to the ic?s signal ground can cause ground bounce. the clamping performance of tvs diodes on a single ground pcb can be improved by minimizing the impedance with relatively short and wide ground traces. the pcb layout and ic package parasitic inductances can cause significant overshoot to the tvs?s clamping voltage. the in ductance of the pcb can be reduced by using short trace lengths and multiple layers with separate ground and powe r planes. one effective method to minimize loop problems is to incorporate a ground plane in the pcb design. the AOZ8904 ultra-low capacitance tvs is designed to protect four high speed data transmission lines from transient over-voltages by clamping them to a fixed reference. the low inductance and construction minimizes voltage overshoot during high current surges. when the voltage on the protected line exceeds the reference voltage the internal steering diodes are forward biased, conducting the transient current away from the sensitive circuitry. good circuit board layout is critical for the suppression of esd induced transients. the following guidelines are recommended: 1. place the tvs near the io terminals or connectors to restrict transient coupling. 2. fill unused portions of the pcb with ground plane. 3. minimize the path length between the tvs and the protected line. 4. minimize all conductive loops including power and ground loops. 5. the esd transient return path to ground should be kept as short as possible. 6. never run critical signals near board edges. 7. use ground planes whenever possible. 8. avoid running critical si gnal traces (clocks, resets, etc.) near pcb edges. 9. separate chassis ground traces from components and signal traces by at least 4mm. 10. keep the chassis ground trace length-to-width ratio <5:1 to minimize inductance. 11. protect all external connections with tvs diodes.
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 6 of 11 ieee1394 port connection AOZ8904 ieee 1394 phy ieee 1394 connector 56 1 270p 56 56 56 5.1k tpbiasx tpax+ tpax- tpbx+ tpbx- gnd
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 7 of 11 package dimensions, sot-23-6l e1 e a a2 a1 e e1 d .010mm 0.80 0.95 0.63 2.40 b l c gauge plane seating plane 0.25mm 1 notes: 1. package body sizes exclude mold flash and gate burrs. mold flash at the non-lead sides should be less than 5 mils each. 2. dimension l is measured in gauge plane. 3. tolerance 0.100mm (4 mil) unless otherwise specified. 4. followed from jedec mo-178c & mo-193c. 6. controlling dimension is millimeter. converted inch dimensions are not necessarily exact. symbols a a1 a2 b c d e e1 e e1 l 1 dimensions in millimeters min. 0.90 0.00 0.80 0.30 0.08 2.70 2.50 1.50 0.30 0 nom. 1.10 0.40 0.13 2.90 2.80 1.60 0.95 bsc 1.90 bsc max. 1.25 0.15 1.20 0.50 0.20 3.10 3.10 1.70 0.60 8 symbols a a1 a2 b c d e e1 e e1 l 1 min. 0.035 0.00 0.031 0.012 0.003 0.106 0.098 0.059 0.012 0 nom. 0.043 0.016 0.005 0.114 0.110 0.063 0.037 bsc 0.075 bsc max. 0.049 0.006 0.047 0.020 0.008 0.122 0.122 0.067 0.024 8 dimensions in inches unit: mm recommended land pattern
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 8 of 11 tape and reel dime nsions, sot-23-5&6l tape reel leader/trailer and orientation trailer tape 300mm min. components tape orientation in pocket leader tape 500mm min. k0 b0 p0 a0 p1 p2 d0 d1 e1 e2 e unit: mm unit: mm j r feeding direction tape size 8mm reel size ?177.8 m ?177.8 max. n 55.0 min. w1 8.4 +1.50 / -0.0 package sot23-5/6l lp a0 3.15 0.10 b0 3.20 0.10 k0 1.40 0.10 d0 1.50 0.05 d1 1.00 +0.10 / -0 e 8.00 0.30 e1 1.75 0.10 e2 3.50 0.05 p0 4.00 0.10 p1 4.00 0.10 p2 2.00 0.05 t 0.23 0.03 h 13.0 +0.5 / -0.2 s 1.5 min k 10.1 min. r 12.7 j 4.0 0.1 w1 m n s k h
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 9 of 11 package dimensions, sc-70-6l e1 d e1 e a a2 a1 b c l e 0.15mm 0.65 0.35 1.95 0.65 .010mm gauge plane notes: 1. all dimensions are in millimeters. 2. dimensions are inclusive of plating 3. package body sizes exclude mold flash and gate burrs. mold flash at the non-lead sides should be less than 3 mils. 4. die is facing up for mold and facing down for trim/form; i.e., reverse trim/form. 5. dimension l is measured in gauge plane. 6. controlling dimension is millimeter, converted inch dimensions are not necessarily exact. symbols a a1 a2 b c d e e e1 e1 l dimensions in millimeters min. 0.00 0.7 0.15 0.08 1.85 1.80 1.1 0.26 0 nom. 0.9 2.10 2.30 0.65 bsc 1.30 bsc 1.30 0.36 4 max. 1.10 0.10 1.00 0.30 0.22 2.15 2.40 1.4 0.46 8 symbols a a1 a2 b c d e e e1 e1 l dimensions in inches min. 0.00 0.028 0.006 0.003 0.073 0.071 0.043 0.010 0 nom. 0.035 0.083 0.091 0.026 bsc 0.051 bsc 0.051 0.014 4 max. 0.043 0.004 0.039 0.012 0.009 0.085 0.094 0.055 0.018 8 unit: mm recommended land pattern
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 10 of 11 tape and reel dimensions, sc-70-6l carrier tape reel tape size 8mm reel size ?180 m ?180.00 0.50 package sc-70, 6l (8mm) a0 2.40 0.10 b0 2.40 0.10 k0 1.19 0.10 d0 1.00 min. d1 1.55 0.05 e 8.00 0.30 e1 1.75 0.10 e2 3.50 0.05 p0 4.00 0.10 p1 4.00 0.10 p2 2.00 0.05 t 0.25 0.05 n ?60.50 k0 unit: mm b0 g m w1 s k h n w v r trailer tape 300mm min. or 75 empty pockets components tape orientation in pocket leader tape 500mm min. or 125 empty pockets a0 p1 p2 feeding direction p0 e2 e1 e d0 t d1 w 9.00 0.30 w1 11.40 1.00 h ?13.00 +0.50/-0.20 k 10.60 s 2.00 0.50 g ?9.00 r 5.00 v 18.00 leader/trailer and orientation
AOZ8904 rev. 2.1 january 2011 www.aosmd.com page 11 of 11 part marking akow lt week & year code assembly lot code part number code underscore denotes greeen product otption & assembly location code AOZ8904cil (sot-23) awl AOZ8904hil (sc-70) assembly lot & location code week & year code part number code underscore denotes greeen product as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provi ded in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. this datasheet contains preliminary data; supplementary data may be published at a later date. alpha & omega semiconductor reserves the right to make changes at any time without notice. life support policy alpha & omega semiconductor products are not author ized for use as critical components in life su pport devices or systems.

▲Up To Search▲

Price & Availability of AOZ8904

	To Download AOZ8904 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .