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1/11 january 2002 n meets or exceeds the requirements of ansi tia/eia-644 standard n low voltage differential signaling with typical output voltage of 350mv and a 100 w load n typical output voltage rise and fall times of 750ps (400mbps) n typical propagation delay times of 1.7ns n operates from a single 3.3v supply n power dissipation 25mw typical per driver at 200mhz n driver at high impedance when disabled or with v cc =0v n pin compatible with the am26ls31, sn65lvd31, mc3487 and sn65lvd3487 n low voltage ttl (lvttl) logic input levels description the stlvds31 and stlvds3487 are quad differential line drivers that implements the electrical characteristics of low voltage differential signaling (lvds). this signaling technique lowers the output voltage levels of 5v differential standard levels (such as tia/eia-422b) to reduce the power, increase the switching speeds and allows operations with a 3.3v supply rail. any of the four current mode drivers will deliver a minimum differential output voltage magnitude of 247mv into a 100 w load when enabled. the indended application of this device and signalling tecnique is for point-to-point baseband data transmission over controlled impedance media approximately 100 w . the transmission media may be printed circuit board traces, backplanes or cables. the ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media and noise coupling to the enviroment. the stlvds31 and stlvds3487 are characterized for operation from -40 cto85 c. ordering codes type temperature range package comments STLVDS31BD -40 to 85 c so-16 (tube) 50parts per tube / 20tube per box STLVDS31BDr -40 to 85 c so-16 (tape & reel) 2500 parts per reel stlvds31btr -40 to 85 c tssop16 (tape & reel) 2500 parts per reel stlvds3487bd -40 to 85 c so-16 (tube) 50parts per tube / 20tube per box stlvds3487bdr -40 to 85 c so-16 (tape & reel) 2500 parts per reel stlvds3487btr -40 to 85 c tssop16 (tape & reel) 2500 parts per reel stlvds31 stlvds3487 high speed differential line drivers sop tssop
stlvds31/stlvds3487 2/11 pin configuration stlvds31 pin description stlvds3487 pin description logic diagram and logic symbol for stlvds31 stlvds31 stlvds3487 pln n symbol name and function 1, 7, 9, 15 1a to 4a driver inputs 2, 6, 10, 14 1y to 4y driver outputs 3, 5, 11, 13 1z to 4z driver outputs 4 g enable 12 g enable 8 gnd ground 16 v cc supply voltage pln n symbol name and function 1, 7, 9, 15 1a to 4a driver inputs 2, 6, 10, 14 1y to 4y driver outputs 3, 5, 11, 13 1z to 4z driver outputs 4 1,2en drivers 1 and 2 enable 12 3,4en drivers 3 and 4 enable 8 gnd ground 16 v cc supply voltage
stlvds31/stlvds3487 3/11 logic diagram and logic symbol for stlvds3487 stlvds31 truth table stlvds3487 truth table l=low level, h=high level, x=don't care, z= high impedance absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. note 1: all voltages except differential i/o bus voltage, are with respect to the network ground terminal. recommended operating conditions input enables outputs aggyz hhxhl lhxlh hxlhl lxllh xlhzz open h x l h open x l l h input enables outputs aenyz hhhl lhlh xlzz open h l h symbol parameter value unit v cc supply voltage (note 1) -0.5 to 4.6 v v i dc input voltage -0.5 to (v cc + 0.5) v t stg storage temperature range -65 to +150 c symbol parameter min. typ. max. unit v cc supply voltage 3.0 3.3 3.6 v v ih high level input voltage 2.0 v v ili low level input voltage 0.8 v t a operating temperature range -40 85 c
stlvds31/stlvds3487 4/11 electrical characteristics (over recommended operating conditions unless otherwise noted. all typical values are at t a =25 c, and v cc = 3.3v) symbol parameter test conditions min. typ. max. unit v od differential output voltage r l = 100 w fig. 2 247 350 454 mv d v od change in differential output voltage between logic state -50 50 mv d v oc(ss) change in steady-state common mode output voltage between logic state fig. 3 1.125 1.2 1.375 v v oc(ss) steady-state common mode output voltage fig. 3 -50 50 mv v oc(pp) peak to paek common mode output voltage 80 150 mv i cc supply current v in = 0.8v or 2v, enabled, no load 11.5 20 ma v in = 0.8v or 2v, enabled, r l = 100 w 25 35 ma v in = 0 or v cc , disabled 0.3 1 ma i ih high level input current v ih =2v 4 20 m a i il low level input current v il = 0.8v 0.6 10 m a i sc short circuit output current v o(y) or v o(z) = 0v 6.1 -24 ma v od =0 12 ma i oz high impedance output current v o = 0 or 2.4v 1 m a i off power off output current v cc =0 v o = 2.4v 1 m a c in input capacitance 3 pf
stlvds31/stlvds3487 5/11 switching characteristics (unless otherwise noted. typical values are referred to t a =25 c and v cc = 3.3v) note 1: t sk(o) is the maximum delay time difference between drivers on the same device. rnote 1: rs-232 in to ttl-cmos out (from 50% to 50%) figure 1 : voltage and current definitions symbol parameter test condit ions min. typ. max. unit t plh propagation delay time, low to high output r l = 100 w c l = 10pf fig. 2 0.5 1.4 2 ns t phl propagation delay time, high to low output 1 1.7 2.5 ns t r differential output signal rise time 0.4 0.5 0.6 ns t f differential output signal fall time 0.4 0.5 0.6 ns t sk(p) pulse skew (|t thl =t tlh |) 0.3 0.6 ns t sk(o) channel to channel output skew (note1) 0 0.3 ns t pzh propagation delay time, high impedance to high level output fig. 4 5.4 15 ns t pzl propagation delay time, high impedance to low level output 2.5 15 ns t phz propagation delay time, high level to high impedance output 8.1 15 ns t plz propagation delay time, low level to high impedance output 7.3 15 ns
stlvds31/stlvds3487 6/11 figure 2 : test circuit, timing and voltage definitions for differential output signal note a: all input pulse are supplied by a generator having the following characteristics: t r or t f 1ns, pulse repetition rate (prr) = 50mpps, pulse width = 10 0.2ns. note b: c l includes instrumentation and fixture capacitance within 6mm of the d.u.t. figure 3 : test circuit and definitions for the driver common mode output voltage note a: all input pulse are supplied by a generator having the following characteristics: t r or t f 1ns, pulse repetition rate (prr) = 50mpps, pulse width = 10 0.2ns. note b: c l includes instrumentation and fixture capacitance within 6mm of the d.u.t note c: the measurement of voc(pp ) is made on test equipment with a -3db bandwidth of at least 300mhz
stlvds31/stlvds3487 7/11 figure 4 : note a: all input pulse are supplied by a generator having the following characteristics: t r or t f 1ns, pulse repetition rate (prr) = 0.5mpps, pulse width = 500 10ms. note b: c l includes instrumentation and fixture capacitance within 6mm of the d.u.t.
stlvds31/stlvds3487 8/11 typical performance characteristics (unless otherwise specified t j =25 c) figure 5 : supply current vs temperature figure 6 : supply current vs temperature figure 7 : propagation delay enable to output figure 8 : propagation delay time figure 9 : differential outputt signal
stlvds31/stlvds3487 9/11 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45 (typ.) d 9.8 10 0.385 0.393 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.62 0.024 s8 (max.) so-16 mechanical data po13h
stlvds31/stlvds3487 10/11 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 4.9 5 5.1 0.193 0.197 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0 8 0 8 l 0.45 0.60 0.75 0.018 0.024 0.030 tssop16 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0080338d
stlvds31/stlvds3487 11/11 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for th consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specification mentioned in this publication are subject to change without notice. this publication supersedes and replaces all informatio previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices o systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies

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