MC74VHCT157A
DC CHARACTERISTICS (Voltages Referenced to GND)
V
T
A
= 25°C
T
A
≤ 85°C
−55°C ≤ T ≤
A
CC
125°C
Symbol
Parameter
Condition
(V)
Min
Typ
Max
Min
Max
Min
Max Unit
V
Minimum High−Level Input
Voltage
4.5 to
5.5
2
2
0.8
2
V
IH
V
Maximum Low−Level Input
Voltage
4.5 to
5.5
0.8
0.8
0.8
V
V
IL
V
Maximum High−Level Output
Voltage
V
= V or V
= −50 mA
OH
IN
IH
IL
IL
IL
IL
I
4.5
4.5
4.5
4.4
4.5
0.0
4.4
3.8
4.4
OH
V
= V or V
IN
IH
I
= −8 mA
3.94
3.66
OH
V
Maximum Low−Level Output
Voltage
V
= V or V
V
OL
IN
IH
I
= 50 mA
0.1
0.1
0.1
OL
V
= V or V
IN
IH
I
= 8 mA
4.5
0 to 5.5
5.5
0.36
0.1
0.44
1.0
0.52
1.0
OH
I
Input Leakage Current
V
V
= 5.5 V or GND
mA
mA
IN
IN
IN
I
Maximum Quiescent Supply
Current
= V or GND
4.0
40.0
40.0
CC
CC
I
Additional Quiescent Supply
Current (per Pin)
Any one input:
= 3.4 V
All other inputs:
5.5
1.35
0.5
1.5
5
1.5
5
mA
CCT
V
IN
V
= V or GND
IN
CC
I
Output Leakage Current
V
= 5.5 V
0
mA
OPD
OUT
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3.0ns)
r
f
−55°C ≤ T
≤
A
125°C
T
A
= 25°C
T = ≤ 85°C
A
Min
Typ
Max
Min
Max
Min
Max
Symbol
Parameter
Test Conditions
= 3.3 0.3 V C = 15pF
Unit
t
t
t
,
Maximum Propagation Delay;
A to B to Y
V
V
V
V
V
V
5.6
8.0
7.0
10.0
1.0
1.0
7.7
11.0
1.0
1.0
7.7
11.0
ns
PLH
t
CC
CC
CC
CC
CC
CC
L
C = 50pF
L
PHL
= 5.0 0.5 V C = 15pF
4.1
5.6
6.4
8.4
1.0
1.0
7.5
9.5
1.0
1.0
7.5
9.5
L
C = 50pF
L
,
Maximum Propagation Delay;
S to Y
= 3.3 0.3 V C = 15pF
6.1
8.5
7.5
10.5
1.0
1.0
8.2
11.5
1.0
1.0
8.2
11.5
ns
ns
PLH
L
t
C = 50pF
L
PHL
= 5.0 0.5 V C = 15pF
5.3
6.8
8.1
10.1
1.0
1.0
9.5
11.5
1.0
1.0
9.5
11.5
L
C = 50pF
L
,
Maximum Propagation Delay;
E to Y
= 3.3 0.3 V C = 15pF
6.1
8.5
7.5
10.5
1.0
1.0
8.2
11.5
1.0
1.0
8.2
11.5
PLH
L
t
C = 50pF
L
PHL
= 5.0 0.5 V C = 15pF
5.6
7.1
8.6
10.6
1.0
1.0
10.0
12.0
1.0
1.0
10.0
12.0
L
C = 50pF
L
C
Maximum Input Capacitance
4
10
10
10
pF
pF
IN
Typical @ 25°C, V = 5.0 V
CC
20
C
PD
Power Dissipation Capacitance (Note 6)
6. C is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
PD
Average operating current can be obtained by the equation: I
power consumption; P = C ꢀ V
) = C ꢀ V ꢀ f + I . C is used to determine the no−load dynamic
CC(OPR
PD CC in CC PD
2
ꢀ f + I ꢀ V
.
D
PD
CC
in
CC
CC
NOISE CHARACTERISTICS (Input t = t = 3.0ns, C = 50pF, V = 5.0 V)
r
f
L
CC
T
A
= 25°C
Typ
0.3
Max
0.8
Symbol
Characteristic
Unit
V
V
Quiet Output Maximum Dynamic V
V
OLP
OL
Quiet Output Minimum Dynamic V
− 0.3
− 0.8
2.0
V
V
V
OLV
OL
V
Minimum High Level Dynamic Input Voltage
Maximum Low Level Dynamic Input Voltage
IHD
V
0.8
ILD
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