SN54ALS137A, SN74ALS137A, SN74AS137

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

WITH ADDRESS LATCHES

SDAS203C – APRIL 1982 – REVISED JANUARY 1995

4

POST OFFICE BOX 655303

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

TA = MIN to MAX†

UNIT

(INPUT)

(OUTPUT)

SN54ALS137A

SN74ALS137A

MIN

MAX

MIN

MAX

tPLH

ABC

Y

5

25

5

20

ns

tPHL

A, B, C

Y

6

25

6

20

ns

tPLH

G2

Y

4

15

3

12

ns

tPHL

G2

Y

5

18

4

15

ns

tPLH

G1

Y

5

21

4

17

ns

tPHL

G1

Y

5

19

4

15

ns

tPLH

LE

Y

7

27

6

22

ns

tPHL

LE

Y

7

25

7

20

ns

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

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

SN74AS137

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

–2

mA

IOL

Low-level output current

20

mA

tw

Pulse duration, LE low

6.5

ns

tsu

Setup time at A, B, and C before LE

↑

4

ns

th

Hold time at A, B, and C after LE

↑

1

ns

TA

Operating free-air temperature

0

70

°C