DM74LS163A 查看數據表（PDF） - Fairchild Semiconductor
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DM74LS163A Datasheet PDF : 10 Pages
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DM74LS163A Switching Characteristics
at VCC = 5V and TA = 25°C
From (Input)
RL = 2 kΩ
Symbol
Parameter
To (Output)
CL = 15 pF
CL = 50 pF
Min
Max
Min
Max
fMAX
tPLH
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Clock to
Ripple Carry
25
20
25
30
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to
Ripple Carry
30
38
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
Clock to Any Q
(Load HIGH)
22
27
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to Any Q
(Load HIGH)
27
38
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
Clock to Any Q
(Load LOW)
24
30
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Clock to Any Q
(Load LOW)
27
38
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
Enable T to
Ripple Carry
14
27
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Enable T to
Ripple Carry
15
27
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Clear to Any Q
(Note 14)
28
45
Note 14: The propagation delay clear to output is measured from the clock input transition.
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
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