HD74LVC245A octal bidirectional transceivers with 3-state outputs ade-205-111b(z) 3rd edition december 1996 description the HD74LVC245A has eight buffers with three state outputs in a 20 pin package. when (t / r ) is high, data flows from the a inputs to the b outputs, and when (t / r ) is low, data flows from the b inputs to the a outputs. a and b bus are separated by making enable input ( oe ) high level. low voltage and high speed operation is suitable at the battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation. features ? v cc = 2.0 v to 5.5 v ? all inputs v ih (max.) = 5.5 v (@v cc = 0 v to 5.5 v) ? all input outputs v i/o (max.) = 5.5 v (@v cc = 0 v or output off state) ? typical v ol ground bounce < 0.8 v (@v cc = 3.3 v, ta = 25c) ? typical v oh undershoot > 2.0 v (@v cc = 3.3 v, ta = 25c) ? high output current 24 ma (@v cc = 3.0 v to 5.5 v) function table inputs oe oe oe oe t / r r r r operation l l b data to a bus l h a data to b bus hx z h : high level l : low level x : immaterial z : high impedance
HD74LVC245A rev.3, dec. 1996, page 2 of 10 pin arrangement (top view) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 v cc gnd a0 a2 a3 a4 a5 a6 a7 t / r b1 b2 b3 b4 b5 b6 b7 oe a1 b0 absolute maximum ratings item symbol ratings unit conditions supply voltage v cc ?0.5 to 6.0 v input diode current i ik ?50 ma v i = ?0.5 v input voltage v i ?0.5 to 6.0 v t / r , oe output diode current i ok ?50 ma v o = ?0.5 v 50 ma v o = v cc +0.5 v input / output voltage v i/o ?0.5 to v cc +0.5 v output "h" or "l" ?0.5 to 6.0 v output "z" or v cc :off output current i o 50 ma v cc , gnd current / pin i cc or i gnd 100 ma storage temperature tstg ?65 to 150 c note: the absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
HD74LVC245A rev.3, dec. 1996, page 3 of 10 recommended operating conditions item symbol ratings unit conditions supply voltage v cc 1.5 to 5.5 v data retention 2.0 to 5.5 v at operation input / output voltage v i 0 to 5.5 v t / r , oe v i/o 0 to v cc v output "h" or "l" 0 to 5.5 v output "z" or v cc :off operating temperature ta ?40 to 85 c output current i oh ?12 ma v cc = 2.7 v ?24 *2 ma v cc = 3.0 v to 5.5 v i ol 12 ma v cc = 2.7 v 24 *2 ma v cc = 3.0 v to 5.5 v input rise / fall time *1 t r , t f 10 ns/v notes: 1. this item guarantees maximum limit when one input switches. waveform : refer to test circuit of switching characteristics. 2. duty cycle 50%
HD74LVC245A rev.3, dec. 1996, page 4 of 10 electrical characteristics ta = ?40 to 85c item symbol v cc (v) min max unit test conditions input voltage v ih 2.7 to 3.6 2.0 ? v 4.5 to 5.5 v cc 0.7 ? v v il 2.7 to 3.6 ? 0.8 v 4.5 to 5.5 ? v cc 0.3 v output voltage v oh 2.7 to 5.5 v cc ?0.2 ? v i oh = ?100 a 2.7 2.2 ? v i oh = ?12 ma 3.0 2.4 ? v 3.0 2.2 ? v i oh = ?24 ma 4.5 3.8 ? v v ol 2.7 to 5.5 ? 0.2 v i ol = 100 a 2.7 ? 0.4 v i ol = 12 ma 3.0 ? 0.55 v i ol = 24 ma 4.5 ? 0.55 v input current i in 0 to 5.5 ? 5.0 a v in = 5.5 v or gnd off state output current i oz 2.7 to 5.5 ? 5.0 a v in = v cc , gnd v out = 5.5 v or gnd output leak current i off 0?20av in / v out = 5.5 v quiescent supply current i cc 2.7 to 3.6 ? 10 a v in / v out = 3.6 to 5.5 v 2.7 to 5.5 ? 10 a v in = v out or gnd ? i cc 3.0 to 3.6 ? 500 a v in = one input at (v cc ?0.6)v, other inputs at v cc or gnd
HD74LVC245A rev.3, dec. 1996, page 5 of 10 switching characteristics ta = ?40 to 85c item symbol v cc (v) min typ max unit from (input) to (output) propagation delay time t plh 2.7 ? ? 8.0 ns a or b b or a t phl 3.30.3 1.5 ? 7.0 ns 5.00.5 ? ? 5.5 ns output enable time t zh 2.7 ? ? 9.5 ns oe a or b t zl 3.30.3 1.5 ? 8.5 ns 5.00.5 ? ? 7.0 ns output disable time t zh 2.7 ? ? 8.5 ns oe a or b t lz 3.30.3 1.5 ? 7.5 ns 5.00.5 ? ? 6.5 ns between outut pins skew *1 t oslh 2.7 ???ns t oshl 3.30.3 ? ? 1.0 ns 5.00.5 ? ? 1.0 ns input capacitance c in 2.7 ? 3.0 ? pf output capacitance c o 2.7 ? 15.0 ? pf note: 1. this parameter is characterized but not tested. tos lh = | t plhm - t plhn |, tos hl = | t phlm - t phln |
HD74LVC245A rev.3, dec. 1996, page 6 of 10 test circuit v cc see function table a0 open *1 see under table c = 50 pf oe t / r b0 pulse generator z out = 50 ? input s1 500 ? gnd output v cc 450 ? 50 scope ? s2 l symbol s2 t / t plh phl open gnd 6 v t / t zh hz t / t zl lz open gnd 2 vcc vcc=2.7v, 3.30.3v vcc=5.00.5v note: 1. c l includes probe and jig capacitance. waveforms ? 1 t plh t phl v oh v ol input 10 % gnd 90 % t r t f 90 % 10 % in phase output v ih v ref v ref v ref v ref
HD74LVC245A rev.3, dec. 1996, page 7 of 10 waveforms ? 2 v ? 0.3 v oh v + 0.3 v ol t zl t lz t zh t hz t f t r 90 % 10 % 90 % 10 % v oh v ol gnd waveform - a oe waveform - b v ref v ref v ref v ref v ih v ol1 v oh1 test v ih v ref v oh1 v ol1 1.5 v 3 v gnd 50%vcc 2.7 v vcc vcc gnd vcc=2.7v, 3.30.3v vcc=5.00.5v notes: 1. t r = 2.5 ns, t f = 2.5 ns 2. input waveform : prr = 10 mhz, duty cycle 50% 3. waveform ? a shows input conditions such that the output is "l" level when enable by the output control. 4. waveform ? b shows input conditions such that the output is "h" level when enable by the output control.
HD74LVC245A rev.3, dec. 1996, page 8 of 10 package dimensions hitachi code jedec eiaj mass (reference value) fp-20da ? conforms 0.31 g unit: mm *dimension including the plating thickness base material dimension *0.42 0.08 0.12 0.15 m 20 10 1 *0.22 0.05 0.80 max 11 12.6 5.5 2.20 max 13 max 0? ? 8? 0.70 0.20 + 0.20 ? 0.30 7.80 1.27 0.10 0.10 1.15 0.40 0.06 0.20 0.04
HD74LVC245A rev.3, dec. 1996, page 9 of 10 hitachi code jedec eiaj mass (reference value) ttp-20da ? ? 0.07 g unit: mm *dimension including the plating thickness base material dimension 0.50 0.10 0 ? ? 8 ? *0.17 0.05 6.40 0.20 0.10 1.10 max 0.13 m 0.65 110 20 11 4.40 6.50 6.80 max *0.22 +0.08 ? 0.07 0.07 +0.03 ? 0.04 1.0 0.65 max 0.20 0.06 0.15 0.04
HD74LVC245A rev.3, dec. 1996, page 10 of 10 disclaimer 1. hitachi neither warrants nor grants licenses of any rights of hitachi?s or any third party?s patent, copyright, trademark, or other intellectual property rights for information contained in this document. hitachi bears no responsibility for problems that may arise with third party?s rights, including intellectual property rights, in connection with use of the information contained in this document. 2. products and product specifications may be subject to change without notice. confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. hitachi makes every attempt to ensure that its products are of high quality and reliability. however, contact hitachi?s sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. design your application so that the product is used within the ranges guaranteed by hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail- safes, so that the equipment incorporating hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the hitachi product. 5. this product is not designed to be radiation resistant. 6. no one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from hitachi. 7. contact hitachi?s sales office for any questions regarding this document or hitachi semiconductor products. sales offices hitachi, ltd. semiconductor & integrated circuits. nippon bldg., 2-6-2, ohte-machi, chiyoda-ku, tokyo 100-0004, japan tel: tokyo (03) 3270-2111 fax: (03) 3270-5109 copyright ? hitachi, ltd., 2000. all rights reserved. printed in japan. hitachi asia ltd. hitachi tower 16 collyer quay #20-00, singapore 049318 tel : <65>-538-6533/538-8577 fax : <65>-538-6933/538-3877 url : http://www.hitachi.com.sg url northamerica : http://semiconductor.hitachi.com/ europe : http://www.hitachi-eu.com/hel/ecg asia : http://sicapac.hitachi-asia.com japan : http://www.hitachi.co.jp/sicd/indx.htm hitachi asia ltd. (taipei branch office) 4/f, no. 167, tun hwa north road, hung-kuo building, taipei (105), taiwan tel : <886>-(2)-2718-3666 fax : <886>-(2)-2718-8180 telex : 23222 has-tp url : http://www.hitachi.com.tw hitachi asia (hong kong) ltd. group iii (electronic components) 7/f., north tower, world finance centre, harbour city, canton road tsim sha tsui, kowloon, hong kong tel : <852>-(2)-735-9218 fax : <852>-(2)-730-0281 url : http://www.hitachi.com.hk hitachi europe ltd. electronic components group. whitebrook park lower cookham road maidenhead berkshire sl6 8ya, united kingdom tel: <44> (1628) 585000 fax: <44> (1628) 585160 hitachi europe gmbh electronic components group dornacher stra ? e 3 d-85622 feldkirchen, munich germany tel: <49> (89) 9 9180-0 fax: <49> (89) 9 29 30 00 hitachi semiconductor (america) inc. 179 east tasman drive, san jose,ca 95134 tel: <1> (408) 433-1990 fax: <1>(408) 433-0223 for further information write to: colophon 2.0
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