Philips Semiconductors

Product specification

74ALS139

Dual 1-of-4 decoder/demultiplexer

1991 Feb 08

3

LOGIC DIAGRAM

SF00132

12

3

Ea

A0a

A1a

4

567

Q0a

Q1a

Q2a

Q3a

GND = Pin 8

15

14

13

Eb

A0b

A1b

12

11

10

9

Q0b

Q1b

Q2b

Q3b

FUNCTION TABLE

INPUTS

OUTPUTS

E

A0

A1

Q0

Q1

Q2

Q3

H

X

X

H

H

H

H

L

L

LL

HH

H

L

H

LH

LH

H

L

L

HH

HLH

L

H

H

H

H

H

L

H = High voltage level

L

= Low voltage level

X = Don’t care

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device.

Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL

PARAMETER

RATING

UNIT

Supply voltage

–0.5 to +7.0

V

Input voltage

–0.5 to +7.0

V

Input current

–30 to +5

mA

Voltage applied to output in High output state

V

Current applied to output in Low output state

16

mA

Operating free-air temperature range

0 to +70

°C

Storage temperature range

–65 to +150

°C

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

MIN

NOM

MAX

UNIT

Supply voltage

4.5

5.0

5.5

V

High-level input voltage

2.0

V

Low-level input voltage

0.8

V

Input clamp current

–18

mA

High-level output current

–0.4

mA

Low-level output current

8

mA

Operating free-air temperature range

0

+70

°C