December 1990

6

Philips Semiconductors

Product specification

Dual 4-input AND gate

74HC/HCT21

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see

Output capability: standard

Note to HCT types

The value of additional quiescent supply current (

To determine

AC CHARACTERISTICS FOR 74HCT

AC WAVEFORMS

PACKAGE OUTLINES

See

INPUT

UNIT LOAD COEFFICIENT

nA, nB,

1.50

nC, nD

1.50

SYMBOL

PARAMETER

TEST CONDITIONS

74HCT

UNIT

(V)

WAVEFORMS

+25

−40 to+85

−40 to+125

min.

typ.

max.

min.

max.

min.

max.

propagation delay

nA, nB nC, nD to nY

15

27

34

41

ns

4.5

Fig.6

output transition time

7

15

19

22

ns

4.5

Fig.6

Fig.6

Waveforms showing the input (nA, nB, nC, nD) to output (nY) propagation delays and the output transition

times.