Texas Instruments SN54ALS139J, SN74ALS139D, SN74ALS139DR, SN74ALS139N, SN74ALS139N3 Datasheet

SN54ALS139, SN74ALS139

OUTPUTS

ENABLE

DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

SDAS204A – APRIL 1982 – REVISED DECEMBER 1994

• Designed Specifically for High-Speed

Memory Decoders and Data Transmission
Systems

• Incorporate Two Enable Inputs to Simplify

Cascading and/or Data Reception

• Package Options Include Plastic

Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs

description

The ′ALS139 are dual 2-line to 4-line
decoders/demultiplexers designed for use in
high-performance memory-decoding or data­routing applications requiring very short
propagation delay times. In high-performance
memory systems, these devices can minimize the
effects of system decoding. When employed with
high-speed memories utilizing a fast-enable
circuit, the delay times of these decoders and the
enable time of the memory are usually less than
the typical access time of the memory . Therefore,
the effective system delay introduced by the
Schottky-clamped system decoder is negligible.

SN54ALS139 ...J PACKAGE

SN74ALS139 ...D OR N PACKAGE

SN54ALS139 . . . FK PACKAGE

1B

1Y0

NC
1Y1
1Y2

(TOP VIEW)

1G

1A

1B
1Y0
1Y1
1Y2
1Y3

GND

(TOP VIEW)

3 2 1 20 19

4
5
6
7
8

910111213

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

1A1GNC

V

CC

2G
2A
2B
2Y0
2Y1
2Y2
2Y3

9

CC

2G

V

2A

18
17

2B

16

NC

15

2Y0

14

2Y1

The ′ALS139 comprise two individual 2-line to
4-line decoders in a single package. The
active-low enable (G

) input can be used as a data

NC – No internal connection

1Y3

GND

NC

2Y3

2Y2

line in demultiplexing applications. These
decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its
driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and
simplify system design.

The SN54ALS139 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ALS139 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

ENABLE

G

H X X H H H H

L L LLHHH
L LHHLHH
L HLHHLH
L HHHHHL

SELECT

B A Y0 Y1 Y2 Y3

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1994, Texas Instruments Incorporated

1

SN54ALS139, SN74ALS139
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

SDAS204A – APRIL 1982 – REVISED DECEMBER 1994

X/Y

†

4

12
11
10

1Y0

5

1Y1

6

1Y2

7

1Y3
2Y0
2Y1
2Y2

9

2Y3

0
1
2
3

1A
1B

1G

2A
2B
2G

2
3
1

14
13

15

logic symbols (alternatives)

2

1A

3

1B

1

1G

14

2A

13

2B

15

2G

†

These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the D, J, and N packages.

1

EN

logic diagram (positive logic)

1A

1B

1

2

3

15

Enable 1G

Select
Inputs

Enable 2G

DMUX

0

G

1

7

12

11

0

0
3

1
2
3

4

1Y0

5

1Y1

6

1Y2

1Y3

2Y0

2Y1

Data
Outputs

12
11
10

4

1Y0

5

1Y1

6

1Y2

7

1Y3
2Y0
2Y1
2Y2

9

2Y3

14

Select
Inputs

Pin numbers shown are for the D, J, and N packages.

2

2A

2B

13

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

10

2Y2

9

2Y3

SN54ALS139, SN74ALS139

UNIT

PARAMETER

TEST CONDITIONS

UNIT

V

V

V

V

(

)

(

)

(INPUT)

(OUTPUT)

A or B

Y

ns

G

Y

ns

DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

SDAS204A – APRIL 1982 – REVISED DECEMBER 1994

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, V
Input voltage, V
Operating free-air temperature range, T

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

: SN54ALS139 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

†

SN74ALS139 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

recommended operating conditions

SN54ALS139 SN74ALS139

MIN NOM MAX MIN NOM MAX

V
V
V
I
I
T

CC
IH

IL
OH
OL

A

Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.7 0.8 V
High-level output current –0.4 –0.4 mA
Low-level output current 4 8 mA
Operating free-air temperature –55 125 0 70 °C

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)

SN54ALS139 SN74ALS139

MIN TYP‡MAX MIN TYP‡MAX

V

IK

V

OH

OL

I

I

I

IH

I

IL

§

I

O

I

‡

All typical values are at VCC = 5 V, TA = 25°C.

§

The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

CC

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
VCC = 4.5 V to 5.5 V, IOH = –0.4 mA VCC –2 VCC –2 V

= 4.5

CC

VCC = 5.5 V, VI = 7 V 0.1 0.1 mA
VCC = 5.5 V, VI = 2.7 V 20 20 µA
VCC = 5.5 V, VI = 0.4 V –0.1 –0.1 mA
VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA
VCC = 5.5 V 8 13 8 13 mA

IOL = 4 mA 0.25 0.4 0.25 0.4
IOL = 8 mA 0.35 0.5

switching characteristics (see Figure 1)

¶

VCC = 4.5 V to 5.5 V,
CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PLH

t

PHL

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

FROM
INPUT

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TO

OUTPUT

RL = 500 Ω
TA = MIN to MAX

SN54ALS139 SN74ALS139

MIN MAX MIN MAX

3 17 3 14
3 17 3 14
3 17 3 14
3 18 3 15

,

¶

UNIT

3

SN54ALS139, SN74ALS139
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS

SDAS204A – APRIL 1982 – REVISED DECEMBER 1994

PARAMETER MEASUREMENT INFORMATION

SERIES 54ALS/74ALS AND 54AS/74AS DEVICES

V

CC

R

L

From Output

Under Test

(see Note A)

C

L

Test
Point

R

L

From Output

Under Test

(see Note A)

Test
Point

C

L

From Output

Under Test

(see Note A)

7 V

RL = R1 = R2

S1

R1

C

L

Test
Point

R2

LOAD CIRCUIT FOR

BI-STATE

TOTEM-POLE OUTPUTS

Timing

Input

t

su

Data

Input

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Output

Control

(low-level

enabling)

Waveform 1

S1 Closed

(see Note B)

Waveform 2

S1 Open

(see Note B)

t

PZL

t

PZH

ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

VOLTAGE WAVEFORMS

1.3 V

t

PHZ

1.3 V

1.3 V

t

1.3 V1.3 V

1.3 V1.3 V

FOR OPEN-COLLECTOR OUTPUTS

h

t

PLZ

LOAD CIRCUIT

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

[

3.5 V

V

OL

0.3 V

V

OH

0.3 V

[

0 V

High-Level

Low-Level

Out-of-Phase

(see Note C)

Pulse

Pulse

Input

In-Phase

Output

Output

LOAD CIRCUIT

FOR 3-STATE OUTPUTS

1.3 V 1.3 V

t

w

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PULSE DURATIONS

1.3 V 1.3 V

t

PLH

t

PHL

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

1.3 V1.3 V

t

PHL

t

PLH

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

V

V

V

V

OH

OL

OH

OL

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuits and Voltage Waveforms

4

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