SN54F20, SN74F20

DUAL 4-INPUT POSITIVE-NAND GATES

SDFS041A – MARCH 1987 – REVISED OCTOBER 1993

2–3

POST OFFICE BOX 655303

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)

′F20

SN54F20

SN74F20

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

ABCor D

Y

1.6

3.3

5

1.2

7

1.6

6

ns

tPHL

A, B, C, or D

Y

1

2.8

4.3

1

6.5

1

5.3

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.