SN54F138, SN74F138

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

SDFS051B – MARCH 1987 – REVISED JULY 1996

5

POST OFFICE BOX 655303

switching characteristics (see Note 3)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

CL = 50 PF,

RL = 500 Ω,

TA = 25°C

VCC = 4.5 V TO 5.5 V,

CL = 50 PF,

RL = 500 Ω,

TA = MIN TO MAX†

UNIT

(INPUT)

(OUTPUT)

′F138

SN54F138

SN74F138

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

ABor C

Y

2.7

5.2

7.5

2.7

12

2.7

8.5

ns

tPHL

A, B, or C

Y

3.2

5.7

8

3.2

9.5

3.2

9

ns

tPLH

G2A or G2B

Y

2.7

5

7

2.7

11

2.7

8

ns

tPHL

G2A or G2B

Y

2.2

4.9

7

2.2

8

2.2

7.5

ns

tPLH

G1

Y

3.2

5.8

8

3.2

12.5

3.2

9

ns

tPHL

G1

Y

2.7

5.2

7.5

2.7

8.5

2.7

8.5

ns

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

NOTE 3: Load circuits and waveforms are shown in Section 1.