Philips Semiconductors
Product specification
Quad 2-input NOR gate
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I
CC
category: SSI
Notes to HCT types
74HC/HCT02
The value of additional quiescent supply current (∆I
CC
) for a unit load of 1 is given in the family specifications.
To determine
∆I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
nA, nB
UNIT LOADCOEFFICIENT
1.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL PARAMETER
+25
min.
t
PHL
/ t
PLH
t
THL
/ t
TLH
propagation delay
nA, nB to nY
output transition time
typ.
11
7
max.
19
15
−40
to+85
min.
max.
24
19
−40
to+125
min.
max.
29
22
ns
ns
4.5
4.5
Fig.6
Fig.6
UNIT
V
CC
(V)
WAVEFORMS
TEST CONDITIONS
AC WAVEFORMS
HC: V
M
= 50%; V
I
= GND to V
CC
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.6
Waveforms showing the input (nA, nB) to output (nY) propagation delays and the output transition times.
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
5
PHILIPS [ NXP SEMICONDUCTORS ]
