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Número de pieza | HD74AC194 | |
Descripción | 4-bit Bidirectional Unviersal Shift Register | |
Fabricantes | Hitachi Semiconductor | |
Logotipo | ||
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No Preview Available ! HD74AC194
4-bit Bidirectional Unviersal Shift Register
Description
This bidirectional shift register is designed to incorporate virtually all of the features a system designer may
want in a shift register. It features parallel inputs, parallel outputs, right shift and left shift serial inputs,
operating mode control inputs, and a direct overriding clear line. The register has four destinct modes of
operation: parallel (broadside) load, shift right (in the direction Q0 toward Q3); shift left; inhibit clock (do
nothing).
Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode
control inputs, S0 and S1, high. The data are loaded into their respective flip-flops and appear at the output
after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is
accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial
date for this mode is entered at the shift right data input. When S0 is low and S1 is high, data shifts left
synchronously and new data is entered at the shifts left serial input. Clocking of the flip-flops is inhibited
when both mode control inputs are low. The mode control inputs should be changed only when the clock
input is high.
Features
• Asynchronous Master Reset
• Hole (Do Nothing) Mode
• Outputs Source/Sink 24 mA
1 page HD74AC194
AC Characteristics: HD74AC194
Item
Maximum clock
frequency
Symbol
f max
VCC (V)*1
3.3
5.0
Ta = +25°C
CL = 50 pF
Min Typ
7.5 —
100 —
Propagation delay
t PLH
3.3
CP to Qn
5.0
Propagation delay
t PHL
3.3
CP to Qn
5.0
Propagation delay
t PHL
3.3
MR to Qn
5.0
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
1.0
1.0
1.0
1.0
1.0
1.0
—
—
—
—
—
—
Max
13.0
10.0
13.0
10.0
10.5
8.0
Ta = –40°C to +85°C
CL = 50 pF
Min Max
65
85
1.0 15.0
1.0 11.5
1.0 15.0
1.0 11.5
1.0 12.5
1.0 9.0
Unit
MHz
ns
ns
ns
AC Operating Requirements: HD74AC194
Item
Setup time, HIGH or LOW
Pn or DSR or DSL to CP
Hold time, HIGH or LOW
Pn or DSR or DSL to CP
Setup time, HIGH or LOW
Sn to CP
Hold time, HIGH or LOW
Sn to CP
Recovery time
MR to CP
Symbol
t su
Ta = +25°C
CL = 50 pF
VCC (V)*1 Typ
3.3 —
5.0 —
th 3.3 —
5.0 —
tsu 3.3 —
5.0 —
th 3.3 —
5.0 —
trec 3.3 —
5.0 —
Pulse width
tw 3.3 —
5.0 —
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Ta = –40°C
to +85°C
CL = 50 pF
Guaranteed Minimum
5.5 7.0
4.0 5.0
2.0 3.0
1.5 2.0
6.0 7.5
4.5 5.5
0.0 0.0
0.0 0.0
0.5 0.5
0.5 0.5
5.5 7.0
4.5 5.0
Unit
ns
ns
ns
ns
ns
ns
5
5 Page 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
Asia (Singapore)
Asia (Taiwan)
Asia (HongKong)
Japan
: http:semiconductor.hitachi.com/
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: http://www.has.hitachi.com.sg/grp3/sicd/index.htm
: http://www.hitachi.com.tw/E/Product/SICD_Frame.htm
: http://www.hitachi.com.hk/eng/bo/grp3/index.htm
: 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 Stra§e 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.
Hitachi Asia (Hong Kong) Ltd.
16 Collyer Quay #20-00
Group III (Electronic Components)
Hitachi Tower
7/F., North Tower, World Finance Centre,
Singapore 049318
Harbour City, Canton Road, Tsim Sha Tsui,
Tel: 535-2100
Kowloon, Hong Kong
Fax: 535-1533
Tel: <852> (2) 735 9218
Fax: <852> (2) 730 0281
Hitachi Asia Ltd.
Telex: 40815 HITEC HX
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
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
11 Page |
Páginas | Total 11 Páginas | |
PDF Descargar | [ Datasheet HD74AC194.PDF ] |
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