mm74hct191 National Semiconductor Corporation, mm74hct191 Datasheet - Page 3

• Manufacturer Part Number: mm74hct191
• Description: Mm54hct190/mm74hct190 Synchronous Decade Up/ Down Counters With Mode Control. Mm54hct191/ Mm74hct191 Synchronous Binary Up/down Counters With Mode Control
• Manufacturer: National Semiconductor Corporation

f
t
t
t
t
t
t
t
t
t
AC Electrical Characteristics
MAX
PLH
PLH
PLH
PLH
PLH
PLH
PLH
PHL
W
Symbol
t
t
t
t
t
t
t
t
PHL
PHL
PHL
PHL
PHL
PHL
PHL
PLH
Maximum Clock Frequency
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Maximum Propagation
Delay Time
Minimum Clock or Load
Input Pulse Width
Parameter
Down Up
Down Up
Data A
B C D
Enable
From
Clock
Clock
Clock
Input
Load
T
A
e
25 C V
Ripple Clock
Ripple Clock
Ripple Clock
Max Min
Max Min
3
CC
Output
Q
Q
Q
Q
Q
Q
C
C
C
A
A
A
To
e
Q
Q
Q
Q
Q
Q
5 0V t
D
D
D
B
B
B
r
e
Conditions
t
f
e
6 ns C
L
e
15 pF unless otherwise specified
Typ
40
30
27
16
24
30
29
22
22
10
Guaranteed
Limits
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns