
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
= 50 pF
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
19
7
6
90
18
15
75
15
13
115
23
20
95
19
16
135
27
23
110
22
19
ns
2.0
4.5
6.0
2.0
4.5
6.0
Fig.7
t
THL
/ t
TLH
output transition time
ns
Fig.7