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HD74AC139/HD74ACT139
Dual 1-of-4 Decoder/Demultiplexer
Description
The HD74AC139/HD74ACT139 is a high-speed, dual 1-of-4 decoder/demultiplexer. The device has two independent decoders, each accepting two inputs and providing four mutually-exclusive active-Low outputs. Each decoder has an active-Low Enable input which can be used as a data input for a 4-output demultiplexer. Each half of the HD74AC139/HD74ACT139 can be used as a function generator providing all four minterms of two variables.
Features
* * * * * Multifunction Capability Two Completely Independent 1-of-4 Decoders Active Low Mutually Exclusive Outputs Outputs Source/Sink 24 mA HD74ACT139 has TTL-Compatible Inputs
HD74AC139/HD74ACT139
Pin Arrangement
Ea 1 A0a 2 A1a 3 O0a 4 O1a 5 O2a 6 O3a 7 GND 8 (Top view)
16 VCC 15 Eb 14 A0b 13 A1b 12 O0b 11 O1b 10 O2b 9 O3b
Logic Symbol
E
A0
A1
E
A0
A1
DECODER a
DECODER b
O0 O1 O2 O3
O0 O1 O2 O3
Pin Names
A0, A1 E O0 to O 3 Address Inputs Enable Inputs Outputs
2
HD74AC139/HD74ACT139
Logic Diagram
Ea A0a A1a Eb A0b A1b
O0a
O1a
O2a
O3a
O0b
O1b
O2b
O3b
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Functional Description
The HD74AC139/HD74ACT139 is a high-speed dual 1-of-4 decoder/demultiplexer. The device has two independent decoders, each of which accepts two binary weighted inputs (A 0 to A1) and provides four mutually exclusive active-Low outputs (O0 to O3). Each decoder has an active-Low enable (E). When E is High all outputs are forced High. The enable can be used as the data input for a 4-output demultiplexer application. Each half of the HD74AC139/HD74ACT139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in Figure a, and thereby reducing the number of packages required in a logic network.
Truth Table
Inputs E H L L L L H: L: X: A0 X L H L H High Voltage Level Low Voltage Level Immaterial A1 X L L H H Outputs O0 H L H H H O1 H H L H H O2 H H H L H O3 H H H H L
3
HD74AC139/HD74ACT139
Figure a: Gate Functions (each half)
E A0 A1 E A0 A1 E A0 A1 E A0 A1 O3 O2 O1 O0 E A0 A1 E A0 A1 E A0 A1 E A0 A1 O3 O2 O1 O0
DC Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Maximum ICC/input (HD74ACT139) Symbol I CC I CC I CCT Max 80 8.0 1.5 Unit A A mA Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C VIN = VCC - 2.1 V, VCC = 5.5 V Ta = Worst case
4
HD74AC139/HD74ACT139
AC Characteristics: HD74AC139
Ta = +25C CL = 50 pF Item Propagation delay An to On Propagation delay An to On Propagation delay En to On Propagation delay En to On Note: 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 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Typ 8.0 6.5 7.0 5.5 9.5 7.0 8.0 6.0 Max 11.5 8.5 10.0 7.5 12.0 8.5 10.0 7.5 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 13.0 9.5 11.0 8.5 13.0 10.0 11.0 8.5 ns ns ns Unit ns
AC Characteristics: HD74ACT139
Ta = +25C CL = 50 pF Item Propagation delay An to On Propagation delay An to On Propagation delay En to On Propagation delay En to On Note: Symbol t PLH t PHL t PLH t PHL VCC (V)*1 5.0 5.0 5.0 5.0 Min 1.0 1.0 1.0 1.0 Typ 6.0 6.0 7.0 7.0 Max 8.5 9.5 10.0 9.5 Ta = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 Max 9.5 10.5 11.0 10.5 Unit ns ns ns ns
1. Voltage Range 5.0 is 5.0 V 0.5 V
Capacitance
Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 40.0 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V
5
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
Unit: mm
5.00 5.30 Max 16 9 4.40 1
0.08 *0.22 + 0.07 -
8 0.65 1.0 6.40 0.20 0 - 8 0.50 0.10
0.20 0.06
0.13 M 0.65 Max
*0.17 0.05 0.15 0.04
1.10 Max
0.10
0.07 +0.03 -0.04
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
TTP-16DA -- -- 0.05 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
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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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