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HD74LVC138
3-to-8-line Decoder / Demultiplexer
ADE-205-068B(Z) Rev.2 September 1995 Description
The HD74LVC138 has three binary select inputs in a 16 pin package. If the device is enabled these inputs determine which one of the eight normally high outputs will go low. Two active low and one active high enables are provided to ease the cascading of decoders. Low voltage and high speed operation is suitable at the battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation.
Features
* * * * * VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25C) High output current 24 mA (@VCC = 3.0 V to 5.5 V)
HD74LVC138
Function Table
Inputs Enable G1 X X L H H H H H H H H H: L: X: G2A X H X L L L L L L L L G2B H X X L L L L L L L L Select C X X X L L L L H H H H B X X X L L H H L L H H A X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H Y3 H H H H H H L H H H H Outputs Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L
High level Low level Immaterial
Pin Arrangement
A1 B2 C3 G2A 4 G2B 5 G1 6 Y7 7 GND 8 B C G2A G2B G1 Y7 Y6 A Y0 Y1 Y2 Y3 Y4 Y5
16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6
(Top view)
2
HD74LVC138
Absolute Maximum Ratings
Item Supply voltage Input diode current Input voltage Output diode current Symbol VCC I IK VI I OK Ratings -0.5 to 6.0 -50 -0.5 to 6.0 -50 50 Output voltage Output current VCC, GND current / pin Storage temperature VO IO I CC or IGND Tstg -0.5 to VCC +0.5 50 100 -65 to +150 Unit V mA V mA mA V mA mA C VO = -0.5 V VO = VCC +0.5 V VI = -0.5 V Conditions
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
Recommended Operating Conditions
Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI VO Operating temperature Output current Ta I OH 0 to 5.5 0 to V CC -40 to 85 -12 -24 I OL
*1 *2
Unit V V V V C mA mA mA mA ns/V
Conditions Data retention At operation G, A, B, C Y0 to Y7
VCC = 2.7 V VCC = 3.0 V to 5.5 V VCC = 2.7 V VCC = 3.0 V to 5.5 V
12 24
*2
Input rise / fall time
t r, t f
10
Notes: 1. This item guarantees maximum limit when one input switches. Waveform : Refer to test circuit of switching characteristics. 2. duty cycle 50%
3
HD74LVC138
Electrical Characteristics
Ta = -40 to 85C Item Input voltage Symbol VCC (V) VIH Min Max -- -- 0.8 Unit V V V I OH = -100 A I OH = -12 mA Test Conditions
2.7 to 3.6 2.0 4.5 to 5.5 VCCx0.7
VIL
2.7 to 3.6 -- 4.5 to 5.5 --
VCCx0.3 V V V V V V V V V V A A A VIN = 5.5 V or GND VIN = VCC or GND VIN = one input at(VCC -0.6)V, other inputs at V CC or GND I OL = 100 A I OL = 12 mA I OL = 24 mA I OH = -24 mA
Output voltage
VOH
2.7 to 5.5 VCC -0.2 -- 2.7 3.0 3.0 4.5 2.2 2.4 2.0 3.8 -- -- -- -- 0.2 0.4 0.55 0.55 5.0 20 500
VOL
2.7 to 5.5 -- 2.7 3.0 4.5 -- -- -- -- --
Input current
I IN I CC
0 to 5.5 5.5
Quiescent supply current I CC
3.0 to 3.6 --
Switching Characteristics
Ta = -40 to 85C Item Propagation delay time Symbol VCC (V) t PLH t PHL 2.7 3.30.3 5.00.5 Input capacitance Output capacitance CIN CO 2.7 2.7 Min -- 1.5 -- -- -- Typ 7.0 5.0 3.5 3.0 15.0 Max 10.0 9.0 7.5 -- -- Unit ns ns ns pF pF From (Input) To (Output) G, A, B, C Y0 to Y 7
4
HD74LVC138
Test Circuit
VCC VCC
A See Function Table Input B C G1 G 2A G 2B Y 0 to Y 7 CL = 50 pF 450 50 Scope Output
Pulse Generator Zout = 50
Note:
1.
CL includes probe and jig capacitance.
5
HD74LVC138
Waveforms
tr Input 10 % t PLH In phase output t PHL 90 % Vref 90 % Vref 10 % t PHL VOH Vref Vref VOL t PLH VOH Out of phase output Vref Vref VOL Symbol VIH Vref Notes: 1. 2. t r = 2.5 ns, tf = 2.5 ns Input waveform : PRR = 10 MHz, duty cycle 50% VCC = 2.7 V, 3.30.3 V VCC = 5.00.5 V 2.7 V VCC 1.5 V 50%VCC tf VIH GND
6
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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