hd74hc651/hd74hc652 octal bus transceivers/registers (with inverted 3-state outputs) octal bus transceivers/registers (with 3-state outputs) ade-205-519 (z) 1st. edition sep. 2000 description this device consists of bus transceiver circuits, d-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. enable gab and gba are provided to cotrol the transceiver functions. select ab and select ba control pins are provided to select whether real-time or stored data is transferred. a low input level selects real-time data, and a high selects stored data. the following examples demonstrate the four fundamental bus-management functions that can be performed with the hd74hc651 and hd74hc652. data on the a or b data bus, or both, can be stored in the internal d flip-flops by low-to high transition at the appropriate clock pins (clock ab or clock ba) regardless of the select or enable control pins. when select ab and select ba are in the real-time transfer mode, it is also possible to store data without using the internal d-type flip-flops by simultaneously enabling enable gab and gba . in this configuration each output reinforces its input. thus, when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines will remain at its last state. features high speed operation: t pd (bus to bus) = 16 ns typ (c l = 50 pf) high output current: fanout of 15 lsttl loads wide operating voltage: v cc = 2 to 6 v low input current: 1 ? max low quiescent supply current: i cc (static) = 4 ? max (ta = 25?)
hd74hc651/hd74hc652 2 function table real-time transfer bus b to bus a real-time transfer bus a to bus b storage transfer stored data to a and/or b clock ab x x l or h select ab x l x h enable gab l h l h clock ba x x l or h select ba l x x h enable gba l h h l bus a real-time transfer bus b to bus a bus b real-time transfer bus a to bus b bus a bus b
hd74hc651/hd74hc652 3 storage bus a bus b bus a transfer stored data to a and/or b bus b pin arrangement 1 2 3 4 5 6 7 8 9 10 11 12 clock ab select ab enable gab a 1 a 2 a 3 a 4 a 5 a 6 a 7 a 8 gnd v cc clock ba select ba enable gba b 1 b 2 b 3 b 4 b 5 b 6 b 7 b 8 24 23 22 21 20 19 18 17 16 15 14 13 (top view)
hd74hc651/hd74hc652 4 absolute maximum ratings item symbol rating unit supply voltage range v cc ?.5 to +7.0 v input voltage v in ?.5 to v cc + 0.5 v output voltage v out ?.5 to v cc + 0.5 v output current i out 35 ma dc current drain per v cc , gnd i cc , i gnd 75 ma dc input diode current i ik 20 ma dc output diode current i ok 20 ma power dissipation per package p t 500 mw storage temperature tstg ?5 to +150 c logic diagram hd74hc651 x 7 a b cba sab gab cab sba gba q cba
cba d q cab
cab d v cc v cc
hd74hc651/hd74hc652 5 hd74hc652 x 7 a b cba sab gab cab sba gba q cba cba d q cab cab d v cc v cc
hd74hc651/hd74hc652 6 dc characteristics ta = 25 c ta = ?0 to +85 c item symbol v cc (v) min typ max min max unit test conditions input voltage v ih 2.0 1.5 1.5 v 4.5 3.15 3.15 6.0 4.2 4.2 v il 2.0 0.5 0.5 v 4.5 1.35 1.35 6.0 1.8 1.8 output voltage v oh 2.0 1.9 2.0 1.9 v vin = v ih or v il i oh = ?0 m a 4.5 4.4 4.5 4.4 6.0 5.9 6.0 5.9 4.5 4.18 4.13 i oh = ? ma 6.0 5.68 5.63 i oh = ?.8 ma v ol 2.0 0.0 0.1 0.1 v vin = v ih or v il i ol = 20 m a 4.5 0.0 0.1 0.1 6.0 0.0 0.1 0.1 4.5 0.26 0.33 i ol = 6 ma 6.0 0.26 0.33 i ol = 7.8 ma off-state output current i oz 6.0 0.5 5.0 m a vin = v ih or v il , vout = v cc or gnd input current iin 6.0 0.1 1.0 m a vin = v cc or gnd quiescent supply current i cc 6.0 4.0 40 m a vin = v cc or gnd, iout = 0 m a
hd74hc651/hd74hc652 7 ac characteristics (c l = 50 pf, input t r = t f = 6 ns) ta = 25 c ta = ?0 to +85 c item symbol v cc (v) min typ max min max unit test conditions propagation delay t plh 2.0 170 215 ns clock to bus time t phl 4.5 19 34 43 6.0 29 37 2.0 135 170 ns bus to bus 4.5 16 27 34 6.0 23 29 2.0 190 240 ns select to bus 4.5 18 38 48 6.0 32 41 output enable t zl 2.0 150 190 ns time t zh 4.5 14 30 38 6.0 26 33 output disable t lz 2.0 150 190 ns time t hz 4.5 18 30 38 6.0 26 33 pulse width t w 2.0 80 100 ns 4.5 16 7 20 6.0 14 17 setup time t su 2.0 100 125 ns 4.5 20 4 25 6.0 17 21 hold time t h 2.0 5 5 ns 4.5 5 1 5 6.0 5 5 output rise/fall t tlh 2.0 60 75 ns time t thl 4.5 4 12 15 6.0 10 13 input capacitance cin 5 10 10 pf
hd74hc651/hd74hc652 8 package dimensions hitachi code jedec eiaj mass (reference value) dp-24n conforms 1.84 g unit: mm 0.51 min 2.54 min 5.08 max 7.62 0.25 + 0.11 ?0.05 2.54 0.25 0.48 0.10 12 13 24 6.6 7.0 max 30.4 31.75 max 1.3 0.88 1 0 ?15 1.90 max
hd74hc651/hd74hc652 9 cautions 1. hitachi neither warrants nor grants licenses of any rights of hitachi? or any third party? 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? 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? 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? sales office for any questions regarding this document or hitachi semiconductor products. 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 b 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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