HD74AC670P [ETC]
Register File ; 注册文件\n
| 型号： | HD74AC670P |
| 厂家： | 
ETC |
| 描述： | Register File
|
| 文件： | 总10页 (文件大小：62K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HD74AC670
4 × 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 × 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
1
2
3
4
5
16 VCC
15 D1
D2
D3
D4
14
13
WA0
WA1
RA1
RA0
12 WE
11 OE
10 O1
O4 6
7
8
O3
GND
9
O2
(Top view)
HD74AC670
Logic Symbol
12
15
1
2
3
WE D1
WA0
D2
D3
D4
14
13
5
WA1
RA0
RA0
4
OE O1
O2
9
O3
7
O4
6
11
10
VCC=Pin 16
GND=Pin 8
Pin Names
D1 to D4
WA0, WA1
WE
Data Inputs
Write Address Inputs
Write Enable Input (Active Low)
Read Address Inputs
RA0, RA1
OE
O1 to O4
3-State Output Enable Input (Active Low)
Data Outputs
Write Function Table
Write Inputs
WE
L
WA1
L
WA0
L
D Inputs to
Word 0
L
L
H
Word 1
L
H
L
Word 2
L
H
H
Word 3
H
X
X
None (hold)
H :
High Voltage Level
Low Voltage Level
Immaterial
L
:
:
X
2
HD74AC670
Read Function Table
Read Inputs
OE
L
RA1
L
RA0
L
Outputs from
Word 0
L
L
H
Word 1
L
H
L
Word 2
L
H
H
Word 3
H
X
X
None (HIGH Z)
H :
High Voltage Level
Low Voltage Level
Immaterial
L
:
:
X
3
HD74AC670
Logic Diagram
D4
D3
D2
D1
WE
WA1
WA0
Word
0
G
G
G
D
D
D
G
G
G
D
D
D
G
G
G
D
D
D
G
G
G
D
D
D
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Word
1
Word
2
Word
3
G
D
G
D
G
D
G
D
Q
Q
Q
Q
RA1
OE
RA0
O4
O3
O2
O1
DC Characteristics (unless otherwise specified)
Item
Symbol Max
Unit
Condition
Maximum quiescent supply current
ICC
80
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = Worst case
Maximum quiescent supply current
ICC
8.0
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = 25°C
4
HD74AC670
AC Characteristics: HD74AC670
Ta = +25°C
Ta = –40°C to +85°C
CL = 50 pF
CL = 50 pF
Min
1.0
Item
Symbol VCC (V)*1
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
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
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
Unit
Propagation delay
WE to On
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
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
14.0
11.5
13.5
11.0
12.5
10.0
12.5
10.0
12.0
9.5
ns
1.0
Propagation delay
WE to On
1.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
1.0
Propagation delay
RA1 or RA0 to On
Propagation delay
RA1 or RA0 to On
Propagation delay
Data to On
1.0
1.0
1.0
1.0
1.0
1.0
Propagation delay
Data to On
11.5
9.0
1.0
1.0
Enable time
OE to On
8.0
1.0
6.0
1.0
Enable time
OE to On
10.0
7.5
12.0
9.5
1.0
13.0
10.5
12.0
9.5
1.0
Disable time
OE to On
8.0
11.0
8.5
1.0
6.0
1.0
Disable time
OE to On
9.0
11.5
9.0
1.0
12.5
10.0
7.0
1.0
Note: 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 = –40°C
to +85°C
CL = 50 pF
Ta = +25°C
CL = 50 pF
Item
Symbol VCC (V)*1 Typ
Guaranteed Minimum
Unit
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
tsu
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.0
2.0
3.0
2.0
3.0
2.5
3.0
2.5
3.5
2.5
0.5
0.5
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
ns
th
tw
Latch width
WE to 1
tlatch
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item
Symbol
CIN
Typ
4.5
60
Unit
pF
Condition
VCC = 5.5 V
VCC = 5.0 V
Input capacitance
Power dissipation capacitance
CPD
pF
6
Unit: mm
19.20
20.00 Max
16
1
9
8
1.3
1.11 Max
7.62
+ 0.13
– 0.05
0.25
2.54 ± 0.25
0.48 ± 0.10
0° – 15°
Hitachi Code
DP-16
JEDEC
EIAJ
Conforms
Conforms
Weight (reference value) 1.07 g
Unit: mm
10.06
10.5 Max
9
16
1
8
+ 0.20
7.80
– 0.30
0.80 Max
1.15
0° – 8°
1.27
0.70 ± 0.20
*0.42 ± 0.08
0.40 ± 0.06
0.15
M
0.12
Hitachi Code
JEDEC
EIAJ
FP-16DA
—
Conforms
*Dimension including the plating thickness
Base material dimension
Weight (reference value) 0.24 g
Unit: mm
9.9
10.3 Max
9
16
1
8
1.27
+ 0.10
6.10
– 0.30
1.08
0.635 Max
0° – 8°
+ 0.67
0.60
– 0.20
*0.42 ± 0.08
0.40 ± 0.06
0.15
0.25
M
Hitachi Code
JEDEC
EIAJ
FP-16DN
Conforms
Conforms
*Dimension including the plating thickness
Base material dimension
Weight (reference value) 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 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.
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
Europe
: http:semiconductor.hitachi.com/
: http://www.hitachi-eu.com/hel/ecg
Asia (Singapore)
Asia (Taiwan)
: http://www.has.hitachi.com.sg/grp3/sicd/index.htm
: 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.
Hitachi Europe GmbH
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
Hitachi Asia Pte. Ltd.
16 Collyer Quay #20-00
Hitachi Tower
Singapore 049318
Tel: 535-2100
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
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
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
Telex: 40815 HITEC HX
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
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
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