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HD74AC670
4 x 4 Register File with 3-State Output
Description
The HD74AC670 contains 16 high speed, low power, transparent D-type latches arranged as four words of four bits each, to function as a 4 x 4 register file. Separate read and write inputs, both address and enable, allow simultaneous read and write operation. The 3-state outputs make it possible to connect up to 128 outputs to increase the word capacity up to 512 words. Any number of these devices can be operated in parallel to generate an n-bit length.
Features
* 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers * Outputs Source/Sink 24 mA
Pin Arrangement
D2 1 D3 2 D4 3 RA1 4 RA0 5 O4 6 O3 7 GND 8 (Top view)
16 VCC 15 D1 14 WA0 13 WA1 12 WE 11 OE 10 O1 9 O2
HD74AC670
Logic Symbol
12 15 1 2 3
WE 14 13 5 4 WA0 WA1 RA0 RA0 OE
D1
D2
D3
D4
O1
O2
O3
O4
11
10
9
7
6
VCC=Pin 16 GND=Pin 8
Pin Names
D1 to D4 WA 0, WA 1 WE RA0, RA1 OE O1 to O4 Data Inputs Write Address Inputs Write Enable Input (Active Low) Read Address Inputs 3-State Output Enable Input (Active Low) Data Outputs
Write Function Table
Write Inputs WE L L L L H H: L: X: WA1 L L H H X High Voltage Level Low Voltage Level Immaterial WA0 L H L H X D Inputs to Word 0 Word 1 Word 2 Word 3 None (hold)
2
HD74AC670
Read Function Table
Read Inputs OE L L L L H H: L: X: RA1 L L H H X High Voltage Level Low Voltage Level Immaterial RA0 L H L H X Outputs from Word 0 Word 1 Word 2 Word 3 None (HIGH Z)
3
HD74AC670
Logic Diagram
D4 WE WA1 WA0 Word 0 D3 D2 D1
G Q
D
G Q
D
G Q
D
G Q
D
G Q
D
G Q
D
G Q
D
G Q
D
Word 1
G Q
D
G Q
D
G Q
D
G Q
D
Word 2
Word 3 G Q RA1 D G Q D G Q D G Q D
OE
RA0
O4
O3
O2
O1
DC Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Symbol I CC I CC Max 80 8.0 Unit A A Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C
4
HD74AC670
AC Characteristics: HD74AC670
Ta = +25C CL = 50 pF Item Propagation delay WE to On Propagation delay WE to On Propagation delay RA1 or RA0 to On Propagation delay RA1 or RA0 to On Propagation delay Data to O n Propagation delay Data to O n Enable time OE to O n Enable time OE to O n Disable time OE to O n Disable time OE to O n Note: t PLZ t PHZ t PZL t PZH t PHL t PLH t PHL t PLH t PHL Symbol t PLH VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ 14.0 11.5 13.5 11.0 12.5 10.0 12.5 10.0 12.0 9.5 11.5 9.0 8.0 6.0 10.0 7.5 8.0 6.0 9.0 7.0 Max 17.5 13.5 17.0 13.0 15.5 12.0 15.5 12.0 15.0 11.5 14.5 11.0 11.0 8.5 12.0 9.5 11.0 8.5 11.5 9.0 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 19.0 15.0 18.5 14.5 17.0 13.0 17.0 13.0 16.5 12.5 16.0 12.0 12.0 9.5 13.0 10.5 12.0 9.5 12.5 10.0 ns ns ns ns ns ns ns ns ns Unit ns
1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V
5
HD74AC670
AC Operating Requirements: HD74AC670
Ta = +25C CL = 50 pF Item Setup time Data to WE Setup time WA1 or WA0 to WE Hold time WE to Data Hold time WE to WA1 or WA2 Pulse width WE Latch width WE to 1 Note: t latch tw th Symbol t su VCC (V)*1 Typ 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V 3.0 2.0 3.0 2.0 3.0 2.5 3.0 2.5 3.5 2.5 0.5 0.5 Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 5.5 4.0 5.5 4.5 4.0 4.0 4.0 4.0 5.5 4.5 10.0 10.0 6.0 4.5 6.0 4.5 4.0 4.0 4.0 4.0 7.0 5.0 10.0 10.0 ns ns ns ns ns Unit ns
Capacitance
Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 60 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V
6
19.20 20.00 Max 16 9 7.40 Max 6.30
Unit: mm
1 1.3
1.11 Max
8
0.51 Min
2.54 Min 5.06 Max
7.62
2.54 0.25
0.48 0.10
0.25 - 0.05 0 - 15
Hitachi Code JEDEC EIAJ Weight (reference value)
+ 0.13
DP-16 Conforms Conforms 1.07 g
Unit: mm
10.06 10.5 Max 16 9
5.5
1
*0.22 0.05 0.20 0.04
8 0.80 Max
2.20 Max
0.20 7.80 + 0.30 -
1.15 0 - 8 0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12 M
Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA -- Conforms 0.24 g
*Dimension including the plating thickness Base material dimension
0.10 0.10
0.15
Unit: mm
9.9 10.3 Max 16 9 3.95 1 1.27 0.635 Max 8
0.11 0.14 + 0.04 - 1.75 Max
*0.22 0.03 0.20 0.03
0.10 6.10 + 0.30 -
1.08 0 - 8
0.67 0.60 + 0.20 -
*0.42 0.08 0.40 0.06
0.15 0.25 M
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
FP-16DN Conforms Conforms 0.15 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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