Switching Characteristics
Symbol
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Parameter
at V
CC
e
5V and T
A
e
25 C (See Section 1 for Test Waveforms and Output Load)
From (Input)
To (Output)
R
L
e
400X C
L
e
15 pF
Min
Max
20
Load to
Any Q
Load to
Any Q
Data to
Any Q
Data to
Any Q
Clock to
Ripple Carry
Clock to
Ripple Carry
Clock to
Any Q
Clock to
Any Q
Clock to
Max Min
Clock to
Max Min
Down Up to
Ripple Carry
Down Up to
Ripple Carry
Down Up to
Max Min
Down Up to
Max Min
Enable G to
Ripple Carry
Enable G to
Ripple Carry
33
70
22
70
20
24
24
36
42
52
45
45
33
33
24
24
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Maximum Clock Frequency
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
3
NSC [ NATIONAL SEMICONDUCTOR ]
