Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I
CC
category: MSI
Note to HCT types
74HC/HCT138
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
A
n
E
n
E
3
UNIT LOAD COEFFICIENT
1.50
1.25
1.00
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
T
amb
(°C)
74HCT
SYMBOL PARAMETER
min.
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
PHL
/ t
PLH
t
THL
/ t
TLH
propagation delay
A
n
to Y
n
propagation delay
E
3
to Y
n
propagation delay
E
n
to Y
n
output transition
time
+25
typ.
20
18
19
7
max.
35
40
40
15
−40
to
+85
min.
max.
44
50
50
19
−40
to
+125
min.
max.
53
60
60
22
ns
ns
ns
ns
4.5
4.5
4.5
4.5
Fig.6
Fig.6
Fig.7
Figs 6 and 7
UNIT
V
CC
WAVEFORMS
(V)
TEST CONDITIONS
September 1993
6
PHILIPS [ NXP SEMICONDUCTORS ]
