74hct157db NXP Semiconductors, 74hct157db Datasheet - Page 6

• Manufacturer Part Number: 74hct157db
• Description: Quad 2-input Multiplexer
• Manufacturer: NXP Semiconductors

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