SN54F21, SN74F21

DUAL 4INPUT POSITIVEAND GATES

SDFS006A − MARCH 1987 − REVISED OCTOBER 1993

2−3

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

switching characteristics (see Note 2)

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)

′F21

SN54F21

SN74F21

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

A, B, C, or D

Y

1

3.2

4.7

1

5.6

1

5.3

ns

tPHL

A, B, C, or D

Y

1.5

3.4

5.1

1.5

5.9

1.5

5.5

ns

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

NOTE 2: Load circuits and waveforms are shown in Section 1.