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HD74HC651/HD74HC652
Octal Bus Transceivers/Registers (with inverted 3-state outputs) Octal Bus Transceivers/Registers (with 3-state outputs)
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: tpd (Bus to Bus) = 16 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max (Ta = 25C)
HD74HC651/HD74HC652
Function Table
Real-Time Transfer Real-Time Transfer Bus B to Bus A Bus A to Bus B Storage Clock AB Select AB Enable GAB Clock BA Select BA Enable GBA X X L X L L X L H X X H X H X L Transfer Stored Data to A and/or B L or H H H L or H H L
Bus A
Bus A
Bus B
Real-time transfer Bus B to Bus A
Real-time transfer Bus A to Bus B
2
Bus B
HD74HC651/HD74HC652
Bus A
Bus A
Bus B
Storage
Transfer stored data to A and/or B
Pin Arrangement
Clock AB Select AB Enable GAB A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VCC Clock BA Select BA Enable GBA B1 B2 B3 B4 B5 B6 B7 B8
(Top view)
Bus B
3
HD74HC651/HD74HC652
Absolute Maximum Ratings
Item Supply voltage range Input voltage Output voltage Output current DC current drain per VCC , GND DC input diode current DC output diode current Power Dissipation per package Storage temperature Symbol VCC VIN VOUT I OUT I CC, I GND I IK I OK PT Tstg Rating -0.5 to +7.0 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 35 75 20 20 500 -65 to +150 Unit V V V mA mA mA mA mW C
Logic Diagram
HD74HC651
x7
VCC
Q CAB CAB D
A
VCC
Q CAB CAB
D
B
CAB SBA GBA
CBA SAB GAB
4
HD74HC651/HD74HC652
HD74HC652
x7
VCC
Q CAB CAB D
A
VCC
Q CAB CAB
D
B
CAB SBA GBA
CBA SAB GAB
5
HD74HC651/HD74HC652
DC Characteristics
Ta = 25C Item Input voltage Symbol VIH Ta = -40 to +85C Max -- -- -- 0.5 1.35 1.8 -- -- -- -- -- 0.1 0.1 0.1 0.33 0.33 5.0 1.0 40 A A A I OL = 6 mA I OL = 7.8 mA Vin = VIH or VIL, Vout = VCC or GND Vin = VCC or GND Vin = VCC or GND, Iout = 0 A V I OH = -6 mA I OH = -7.8 mA Vin = VIH or VIL I OL = 20 A V Vin = VIH or VIL I OH = -20 A V Unit V Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 1.5 -- 3.15 -- 4.2 -- -- -- -- -- -- -- -- -- -- 0.5 1.5 3.15 4.2 --
VIL
2.0 4.5 6.0
1.35 -- 1.8 -- 1.9 4.4 5.9 4.13 5.63 -- -- --
Output voltage
VOH
2.0 4.5 6.0 4.5 6.0
1.9 2.0 -- 4.4 4.5 -- 5.9 6.0 -- 4.18 -- 5.68 -- -- -- -- -- -- -- -- -- -- --
VOL
2.0 4.5 6.0 4.5 6.0
0.0 0.1 0.0 0.1 0.0 0.1 -- -- -- -- --
0.26 -- 0.26 -- 0.5 -- 0.1 -- 4.0 --
Off-state output current Input current Quiescent supply current
I OZ Iin I CC
6.0 6.0 6.0
6
HD74HC651/HD74HC652
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25C Item Symbol Ta = -40 to +85C Max 215 43 37 170 34 29 240 48 41 190 38 33 190 38 33 -- -- -- -- -- -- -- -- -- 75 15 13 10 pF ns ns ns ns ns ns ns Select to Bus ns Bus to Bus Unit ns Test Conditions Clock to Bus
VCC (V) Min Typ Max Min 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 80 16 14 -- 19 -- -- 16 -- -- 18 -- -- 14 -- -- 18 -- -- 7 -- 170 -- 34 29 -- --
Propagation delay t PLH time t PHL
135 -- 27 23 -- --
190 -- 38 32 -- --
Output enable time
t ZL t ZH
2.0 4.5 6.0
150 -- 30 26 -- --
Output disable time
t LZ t HZ
2.0 4.5 6.0
150 -- 30 26 -- -- -- -- -- -- -- -- -- 60 12 10 10 -- -- 100 20 17 125 25 21 5 5 5 -- -- -- --
Pulse width
tw
2.0 4.5 6.0
Setup time
t su
2.0 4.5 6.0
100 -- 20 17 5 5 5 -- -- -- -- 4 -- -- -1 -- -- 4 -- 5
Hold time
th
2.0 4.5 6.0
Output rise/fall time
t TLH t THL
2.0 4.5 6.0
Input capacitance
Cin
--
7
Unit: mm
24 31.6 32.5 Max 13
1
2.13 Max
1.2
12 5.70 Max
15.0 Max
13.4
15.24
0.51 Min
2.54 Min
2.54 0.25
0.48 0.10
0.25 - 0.05 0 - 15
+ 0.11
Hitachi Code JEDEC EIAJ Weight (reference value)
DP-24 Conforms Conforms 3.1 g
Cautions
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 failsafes, 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.
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
URL
NorthAmerica : http:semiconductor.hitachi.com/ Europe : http://www.hitachi-eu.com/hel/ecg Asia (Singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm Asia (Taiwan) : http://www.hitachi.com.tw/E/Product/SICD_Frame.htm Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm Japan : http://www.hitachi.co.jp/Sicd/indx.htm For further information write to:
Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Strae 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 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 Telex: 40815 HITEC HX
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.

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