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april 2006 rev. 2 1/16 16 stlvds3487 high speed differential line drivers feature summary meets or exceeds the requirements of ansi tia/eia-644 standard low voltage differential signaling with typical output voltage of 350mv and a 100 ? load typical output voltage rise and fall times of 750ps (400mbps) typical propagation delay times of 1.7ns operates from a single 3.3v supply power dissipation 25mw typical per driver at 200mhz driver at high impedance when disabled or with v cc = 0v pin compatible with the mc3487 and sn65lvd3487 low voltage ttl (lvttl) logic input levels description the stlvds3487 is a 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 ? load when enabled. the intended application of this device and signalling technique is for point-to-point baseband data transmission over controlled impedance media approximately 100 ? . 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 environment. the stlvds3487 is characterized for operation from -40c to 85c. . tssop www.st.com order code part number temperature range package comments STLVDS3487BTR -40 to 85 c tssop16 (tape & reel) 2500 parts per reel obsolete product(s) - obsolete product(s)
stlvds3487 2/16 contents 1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 obsolete product(s) - obsolete product(s)
stlvds3487 pin configuration 3/16 1 pin configuration l=low level, h=high level, x=don?t care, z= high impedance figure 1. pin connections table 1. pin description pin 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 1en, 2en drivers 1 and 2 enable 12 3en, 4en drivers 3 and 4 enable 8 gnd ground 16 v cc supply voltage table 2. truth table input enables outputs aenyz hhhl lhlh xlzz open h l h obsolete product(s) - obsolete product(s)
logic diagram stlvds3487 4/16 2 logic diagram figure 2. logic diagram and logic symbol obsolete product(s) - obsolete product(s)
stlvds3487 maximum ratings 5/16 3 maximum ratings note: 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. table 3. absolute maximum ratings 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 table 4. recommended operating conditions symbol parameter min. typ. max. unit v cc supply voltage 3 3.3 3.6 v v ih high level input voltage 2 v v il low level input voltage 0.8 v t a operating temperature range -40 85 c obsolete product(s) - obsolete product(s)
electrical characteristics stlvds3487 6/16 4 electrical characteristics table 5. electrical characteristics (over recommended operating conditions unless otherwise noted. all typical values are at t a = 25c, and v cc = 3.3v). symbol parameter test conditions min. typ. max. unit v od differential output voltage r l = 100 ?, fig. 2 247 350 454 mv ? v od change in differential output voltage between logic state -50 50 mv ? 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 peak 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 ? 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 a i il low level input current v il = 0.8v 0.6 10 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 a i off power off output current v cc = 0v o = 2.4v 1 a c in input capacitance 3 pf obsolete product(s) - obsolete product(s)
stlvds3487 electrical characteristics 7/16 note: 1 t sk(o) is the maximum delay time difference between drivers on the same device. 2 rs-232 in to ttl-cmos out (from 50% to 50%) table 6. switching characteristics (over recommended operating conditions unless otherwise noted. all typical values are at t a = 25c, and v cc = 3.3v). symbol parameter test conditions min. typ. max. unit t plh propagation delay time, low to high output r l = 100 ?, c l = 10pf fig. 2 0.5 1.4 2 ns t phl propagation delay time, high to low output 11.72.5ns 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) 00.3ns 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 obsolete product(s) - obsolete product(s)
test circuit stlvds3487 8/16 5 test circuit 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. voltage and current definitions figure 4. test circuit, timing and voltage definitions for differential output signal obsolete product(s) - obsolete product(s)
stlvds3487 test circuit 9/16 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 v oc(pp) is made on test equipment with a -3db bandwidth of at least 300mhz. figure 5. test circuit and definitions for the driver common mode output voltage obsolete product(s) - obsolete product(s)
test circuit stlvds3487 10/16 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 figure 6. enable and disable time test circuit and waveform obsolete product(s) - obsolete product(s)
stlvds3487 typical performance characteristics 11/16 6 typical performance characteristics (unless otherwise specified at t j = 25c) figure 7. supply current vs temperature figure 8. supply current vs temperature figure 9. propagation delay enable to output figure 10. propagation delay time r figure 11. differential output signal obsolete product(s) - obsolete product(s)
package mechanical data stlvds3487 12/16 7 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com. obsolete product(s) - obsolete product(s)
stlvds3487 package mechanical data 13/16 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 0.0079 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 obsolete product(s) - obsolete product(s)
package mechanical data stlvds3487 14/16 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 6.7 6.9 0.264 0.272 bo 5.3 5.5 0.209 0.217 ko 1.6 1.8 0.063 0.071 po 3.9 4.1 0.153 0.161 p 7.9 8.1 0.311 0.319 tape & reel tssop16 mechanical data obsolete product(s) - obsolete product(s)
stlvds3487 revision history 15/16 8 revision history table 7. revision history date revision changes 06-apr-2006 2 order codes has been updated and new template. obsolete product(s) - obsolete product(s)
stlvds3487 16/16 please read carefully: i nformation in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st? ) reserve the r ight to make changes, corrections, modifications or improvements, to this document, and the products and services described her ein at any t ime, without notice. a ll st products are sold pursuant to st?s terms and conditions of sale. p urchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st ass umes no l iability whatsoever relating to the choice, selection or use of the st products and services described herein. n o license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. if any part of this d ocument refers to any third party products or services it shall not be deemed a license grant by st for the use of such third p arty products o r services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoeve r of such t hird party products or services or any intellectual property contained therein. u nless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied w arranty with respect to the use and/or sale of st products including without limitation implied w arranties of merchantability, fitness for a particular purpose (and their equivalents under the laws o f any jurisdiction), or infringement of any patent, copyright or other intellectual property right. u nless expressly approved in writing by an authorize representative of st, st products are not designed, a uthorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, n or in products or systems, where failure or malfunction may result in personal injury, death, or s evere property or environmental damage. r esale of st products with provisions different from the statements and/or technical features set forth in this document shall i mmediately void a ny warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoeve r, any l iability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2006 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s)

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