Philips Semiconductors
Product specification
Quad 2-input multiplexer
74HC/HCT157
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
nI0
nI1
E
1.00
1.00
0.60
1.00
S
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
min.
UNIT
WAVEFORMS
VCC
(V)
+25
typ.
−40 to +85
−40 to +125
max.
min.
max.
min.
max.
tPHL/ tPLH propagation delay
nI0 to nY;
16
27
34
41
ns
4.5
Fig.7
nI1 to nY
t
t
t
PHL/ tPLH propagation delay
E to nY
15
22
7
26
37
15
33
46
19
39
56
22
ns
ns
ns
4.5
4.5
4.5
Fig.6
PHL/ tPLH propagation delay
S to nY
Fig.7
THL/ tTLH output transition
time
Fig.6 and Fig.7
December 1990
6
NXP [ NXP ]
