Philips N74ALS139D, N74ALS139N Datasheet

INTEGRATED CIRCUITS

74ALS139

Dual 1-of-4 decoder/demultiplexer

Product specification

1991 Feb 08

IC05 Data Handbook

m n r

Philips Semiconductors	Product specification
Dual 1-of-4 decoder/demultiplexer	74ALS139

FEATURES

PIN CONFIGURATION

•Demultiplexing capability

Two independent 1-of-4 decoders

VCC

•

Ea

1

16

•Multi-function capability

A0a

2

15

Eb

A1a

A0b

3

14

DESCRIPTION

A1b

Q0a

4

13

The 74ALS139 is a dual 1-of-4 decoder/demultiplexer. This device

Q1a

5

12

Q0b

has two independent decoders, each accepting two binary weighted

inputs (A0n, A1n) and providing four mutually exclusive active-Low

Q2a

6

11

Q1b

outputs

(Q0n±Q3n). Each decoder has an active-Low enable (E).

7

10

Q3a

Q2b

When

is High, every output is forced High. The enable can be

E

used as the data input for a 1-of-4 demultiplexer application.

GND

8

9

Q3b

SF00129

TYPICAL

TYPICAL

TYPE

SUPPLY CURRENT

PROPAGATION DELAY

(TOTAL)

74ALS139

6.0ns

4mA

ORDERING INFORMATION

ORDER CODE

DRAWING

DESCRIPTION

COMMERCIAL RANGE

NUMBER

VCC = 5V ±10%,

Tamb = 0°C to +70°C

16-pin plastic DIP

74ALS139N

SOT38-4

16-pin plastic SO

74ALS139D

SOT109-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74ALS (U.L.)

LOAD VALUE

HIGH/LOW

HIGH/LOW

A0n, A1n

Address inputs

1.0/1.0

20μA/0.1mA

Enable inputs (active-Low)

1.0/1.0

20μA/0.1mA

Ea, Eb

Data outputs

20/80

0.4mA/8mA

Q0n, Q1n

NOTE: One (1.0) ALS unit load is defined as: 20μA in the High state and 0.1mA in the Low state.

LOGIC SYMBOL

IEC/IEEE SYMBOL

1

2

3

15

14

13

2

DEMUX

0

4

0

0

3

G

5

Ea

A0a

A1a

Eb

A0b

A1b

3

1

1

2

6

DECODER a

DECODER b

1

7

3

Q0a

Q1a

Q2a

Q3a

Q0b

Q1b

Q2b

Q3b

14

12

13

11

10

4

5

6

7

12

11

10

9

15

9

VCC = Pin 16

GND = Pin 8

SF00130

SF00131

1991 Feb 08

2

853±1426 01670

Philips Semiconductors	Product specification
Dual 1-of-4 decoder/demultiplexer	74ALS139

LOGIC DIAGRAM

Ea		A0a	A1a
1		2	3
4	5	6	7

Q0a Q1a Q2a Q3a

VCC= Pin 16

GND = Pin 8

Eb	A0b	A1b
15	14	13

12	11	10	9
Q0b	Q1b	Q2b	Q3b

SF00132

FUNCTION TABLE

INPUTS

OUTPUTS

A0

A1

E

Q0

Q1

Q2

Q3

H

X

X

H

H

H

H

L

L

L

L

H

H

H

L

H

L

H

L

H

H

L

L

H

H

H

L

H

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
VCC	Supply voltage	±0.5 to +7.0	V
VIN	Input voltage	±0.5 to +7.0	V
IIN	Input current	±30 to +5	mA
VOUT	Voltage applied to output in High output state	±0.5 to VCC	V
IOUT	Current applied to output in Low output state	16	mA
Tamb	Operating free-air temperature range	0 to +70	°C
Tstg	Storage temperature range	±65 to +150	°C

RECOMMENDED OPERATING CONDITIONS

	SYMBOL	PARAMETER		LIMITS		UNIT
			MIN	NOM	MAX
	VCC	Supply voltage	4.5	5.0	5.5	V
	VIH	High-level input voltage	2.0			V
	VIL	Low-level input voltage			0.8	V
	IIk	Input clamp current			±18	mA
	IOH	High-level output current			±0.4	mA
	IOL	Low-level output current			8	mA
	Tamb	Operating free-air temperature range	0		+70	°C

1991 Feb 08

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