rev. 1.0 december 2014 www.aosmd.com page 1 of 8 AOZ8300 ultra-low capacitance tvs diode array general description the AOZ8300 is a transient voltage suppressor array designed to protect high spee d data lines from esd and lightning. this device incorporat es eight surge rated, low capacitance steering diodes and a tvs in a single package. during transient condit ions, the steering diodes direct the transient to either th e positive side of the power supply line or to ground. they aoz83 00 may be used to meet the esd immunity requirements of iec 61000-4-2, level 4. the tvs diodes prov ide effective suppression of esd voltages: 15 kv (a ir discharge) and 8 kv (contact discharge). the AOZ8300 comes in a halogen free and rohs compliant, sot-23 package and is rated over a -40 c to +85 c ambient temperature range. both packages are compatible wi th lead free and snpb assembly techniques. the small size, low capacitance, and high esd protection makes the AOZ8300 ideal for protecting high speed v ideo and data communication interfaces. features z esd protection for high-speed data lines: ? iec 61000-4-2, leve l 4 (esd) immunity test ? 30 kv (air discharge) and 30 kv (contact discharge) ? iec 61000-4-5 (lightning) 20 a (8/20 s) ? iec 61000-4-4 (eft) 40 a (5/50 ns) ? human body model (hbm) 24 kv z protects four i/o lines z low clamping voltage applications z usb 2.0 power and data line protection z video graphics cards z monitors and flat panel displays z digital video interface (dvi) z 10/100/1000 ethernet z notebook computers typical application figure 1. 10/100/1000 ethernet port connection rj45 connector tp2+ tp2- tp3+ tp3- tp4+ tp4- tp1+ tp1- 1 2 3 4 5 6 7 8 gbe ethernet phy AOZ8300 AOZ8300
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 2 of 8 ordering information aos green products use reduced levels of halogens, and are also rohs compliant. please visit www.aosmd.com/media/aosgreenpolicy.pdf 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 = 150 pf, r discharge = 330 ? . 2. human body discharge per mil-std-883, method 3015 c discharge = 100 pf, r discharge = 1.5 k ? . maximum operating ratings part number ambient temperature range package environmental AOZ8300ci-05 -40 c to +85 c sot23-6 green product parameter rating peak pulse current (i pp ), t p = 8/20 s20 a peak power dissipation (8 x 20 s @ 25 c) 450 w storage temperature (t s ) -65 c to +150 c esd rating per iec61000-4-2, contact (1) 30 kv esd rating per iec61000-4-2, air (1) 30 kv esd rating per human body model (2) 30 kv parameter rating junction temperature (t j ) -40 c to +125 c 1 2 3 6 5 4 ch1 vn ch2 ch4 nc ch3 sot23-6 (top view)
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 3 of 8 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 using a 100 ns transmission line pulse (tlp) system. symbol parameter conditions min. typ. max. units v rwm reverse working voltage between i/o and vin (4) 2.5 v v br reverse breakdown voltage i t = 100 a, between i/o and vin (5) 2.8 v i r reverse leakage current v rwm = 2.5 v, between i/o and vin 0.1 a v f diode forward voltage i f = 15 ma 0.70 0.85 1 v v cl channel clamp voltage positive transients negative transient i pp = 5 a, tp = 100 ns, any i/o pin to ground (3)(6) 3.5 -3.5 v v channel clamp voltage positive transients negative transient i pp = 10 a, tp = 100 ns, any i/o pin to ground (3)(6) 4.5 -5 v v channel clamp voltage positive transients negative transient i pp = 30 a, tp = 100 ns, any i/o pin to ground (3)(6) 9 -12 v v c j junction capacitance v r = 0 v, f = 1 mhz, any i/o pin to ground 2.5 3.5 pf ' c j channel input capacitance matching v r = 0 v, f = 1 mhz, between i/o pins (3) 0.2 pf
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 4 of 8 typical performance characteristics -10 -8 -6 -4 -2 0 tlp current vs. clamping voltage 30 25 20 15 10 5 0 clamping voltage (v) tlp current (a) forward current vs. forward voltage (tperiod = 100ns, tr = 1ns) 0 -5 -10 -15 -20 -25 -30 -35 forward voltage (v) forward current (a) 02 1345678
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 5 of 8 application information the AOZ8300 tvs is design to protect up to four data lines from damaging trans ient over-voltage by clamping the voltage to a reference. when the transient on a protected data line exceeds the reference voltage, the steering diode is forward bi as thereby conducting the harmful esd transient away from the sensitive circuitry under protection. pcb layout guidelines printed circuit board layout is key to achieving the highest level of surge immu nity on power and data lines. the location of the protection devices on the pcb is the most important design co nsideration. the AOZ8300 devices should be located as close as possible to the noise source. AOZ8300 devices should be used on all data and power lines that ente r or exit the pcb at the 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 AOZ8300 devices as close as possible to the noise source ensures that a surge voltage will be clamped before the pulse is coupled into adjacent pcb traces. in addition, the pc b should use the shortest possible traces. a short trace length equates to low impedance, which ensures that the surge energy will be dissipated by the AOZ8300 device. long signal traces will act as antennas and receive energy from fields that are produced by the esd pu lse. by keeping line lengths as short as possible, the effici ency of the line to act as an antenna for esd related fields is reduced. minimize interconnecting line lengths by placing devices with the most interconnects as close together as possible. the protection circ uits should shunt the surge voltage to either the refe rence or chassis ground. shunting the surge voltage di rectly to the ic?s signal ground may cause ground bounce. the clamping performance of the tvs diod es on a single ground pcb can be improved by mini mizing the impedance with relatively short and wide grou nd traces. the pcb layout and ic package parasitic inductances can cause significant overshoot to the tvs?s clamping voltage. the inductance of the pcb can be reduced by using short trace lengths and multiple layers with separate ground and power planes. one effective method to minimize loop problems is to incorporate a ground plane in the pcb design. the AOZ8300 ultra-low capacitance tvs is designed to protect four high speed data transmission lines from transient over-voltages by clamping them to a fixed re ference. the low inductance and construction minimizes voltage overshoot during high current surges. when th e voltage on the protected line exceeds the reference volt age 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 signa l 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.
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 6 of 8 package dimensions, sot23, 6l gauge plane seating plane d e1 e e1 b e c 1 l 0.25mm a a1 a2 0.10mm 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 & mc-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 dimensions in millimeters min. 0.90 0.00 0.70 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 dimensions in inches min. 0.035 0.000 0.028 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 unit: mm recommended land pattern 0.95 0.63 0.80 2.40 1.20
AOZ8300 rev. 1.0 december 2014 www.aosmd.com page 7 of 8 tape and reel dimensions, sot23, 6l tape reel leader/trailer and orientation trailer tape 300mm min. components tape orientation in pocket leader tape 500mm min. unit: mm unit: mm j feeding direction tape size 8 mm reel size ?177.80 m ?177.80 max. n ?55.00 min. w1 8.40 +1.50/-0.00 package sot-23 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/-0.0 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 ?13.00 +0.50 / -0.20 s 1.50 min. k 10.10 min. r 12.70 j 4.00 +0.10/-0.10 t k0 b0 d1 a0 d0 p2 p1 p0 e1 e2 e r w1 n m s k h a a aCa unit per reel: 3000pcs
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