Datasheet

December 1990 5
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” .
Output capability: standard
I
CC
category: SSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
=t
f
= 6 ns; C
L
=50pF
SYMBOL PARAMETER
T
amb
(°C) TEST CONDITIONS
74HC
UNIT V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
nA, nB, nC, nD to nY
28
10
8
90
18
15
115
23
20
135
27
23
ns 2.0
4.5
6.0
Fig.7
t
THL
/ t
TLH
output transition time 19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Fig.7