Philips Semiconductors
Product specification
Dual 4-input multiplexer; 3-state
74HC/HCT253
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
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
1In
2In
nOE
S0
0.40
0.40
1.10
1.10
1.10
S1
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
WAVEFORMS
VCC
(V)
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
1In to nY;
20
38
48
57
ns
4.5 Fig.6
2In to nY
t
t
t
PHL/ tPLH propagation delay
Sn to nY
22
14
13
5
40
30
30
12
50
38
38
15
60
45
45
18
ns
ns
ns
ns
4.5 Fig.6
4.5 Fig.7
4.5 Fig.7
4.5 Fig.6
PZH/ tPZL 3-state output enable time
nOE to nY
PHZ/ tPLZ 3-state output disable time
nOE to nY
tTHL/ tTLH output transition time
December 1990
6
NXP [ NXP ]
