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PDF HD74ACT138 Data sheet ( Hoja de datos )
| Número de pieza | HD74ACT138 | |
| Descripción | 1-of-8 Decoder/Demultiplexer | |
| Fabricantes | Hitachi Semiconductor | |
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HD74AC138/HD74ACT138
1-of-8 Decoder/Demultiplexer
Description
The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally
suited for high-speed bipolar memory chip select address decoding. The multiple input enables allow
parallel expansion to a 1-of-24 decoder using just three HD74AC138/HD74ACT138 devices or a 1-of-32
decoder using four HD74AC138/HD74ACT138 devices and one inverter.
Features
• Demultiplexing Capability
• Multiple Input Enable for Easy Expansion
• Active LOW Mutually Exclusive Outputs
• Outputs Source/Sink 24 mA
• HD74ACT138 has TTL-Compatible Inputs
1 page  
HD74AC138/HD74ACT138
DC Characteristics (unless otherwise specified)
Item
Maximum quiescent supply current
Symbol Max
ICC 80
Maximum quiescent supply current ICC
8.0
Maximum ICC/input (HD74ACT138) ICCT
1.5
Unit
µA
µA
mA
Condition
VIN = VCC or ground, VCC = 5.5 V,
Ta = Worst case
VIN = VCC or ground, VCC = 5.5 V,
Ta = 25°C
VIN = VCC – 2.1 V, VCC = 5.5 V
Ta = Worst case
AC Characteristics: HD74AC138
Ta = +25°C
CL = 50 pF
Item
Symbol VCC (V)*1 Min
Typ
Propagation delay
t PLH
3.3
1.0 8.5
An to On
5.0 1.0 6.5
Propagation delay
t PHL
3.3
1.0 8.0
An to On
5.0 1.0 6.0
Propagation delay
t PLH
3.3
1.0 11.0
E1 or E 2 to On
5.0 1.0 8.0
Propagation delay
t PHL
3.3
1.0 9.5
E1 or E 2 to On
5.0 1.0 7.0
Propagation delay
t PLH
3.3
1.0 11.0
E3 to On
5.0 1.0 8.0
Propagation delay
t PHL
3.3
1.0 8.5
E3 to On
5.0 1.0 6.0
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Max
13.0
9.5
12.5
9.0
15.0
11.0
13.5
9.5
15.5
11.0
13.0
8.0
Ta = –40°C to +85°C
CL = 50 pF
Min Max
1.0 15.0
1.0 10.5
1.0 14.0
1.0 10.5
1.0 16.0
1.0 12.0
1.0 15.0
1.0 10.5
1.0 16.5
1.0 12.5
1.0 14.0
1.0 9.5
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/
: http://www.hitachi-eu.com/hel/ecg
: 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 HD74ACT138.PDF ] | |
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