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54191 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54191
Description  Synchronous Up/Down 4-Bit Binary Counter with Mode Control
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54191 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
RL e 400X CL e 15 pF
Units
To (Output)
Min
Max
fMAX
Maximum Clock Frequency
20
MHz
tPLH
Propagation Delay Time
Load to
33
ns
Low to High Level Output
Any Q
tPHL
Propagation Delay Time
Load to
70
ns
High to Low Level Output
Any Q
tPLH
Propagation Delay Time
Data to
22
ns
Low to High Level Output
Any Q
tPHL
Propagation Delay Time
Data to
70
ns
High to Low Level Output
Any Q
tPLH
Propagation Delay Time
Clock to
20
ns
Low to High Level Output
Ripple Carry
tPHL
Propagation Delay Time
Clock to
24
ns
High to Low Level Output
Ripple Carry
tPLH
Propagation Delay Time
Clock to
24
ns
Low to High Level Output
Any Q
tPHL
Propagation Delay Time
Clock to
36
ns
High to Low Level Output
Any Q
tPLH
Propagation Delay Time
Clock to
42
ns
Low to High Level Output
MaxMin
tPHL
Propagation Delay Time
Clock to
52
ns
High to Low Level Output
MaxMin
tPLH
Propagation Delay Time
DownUp to
45
ns
Low to High Level Output
Ripple Carry
tPHL
Propagation Delay Time
DownUp to
45
ns
High to Low Level Output
Ripple Carry
tPLH
Propagation Delay Time
DownUp to
33
ns
Low to High Level Output
MaxMin
tPHL
Propagation Delay Time
DownUp to
33
ns
High to Low Level Output
MaxMin
tPLH
Propagation Delay Time
Enable G to
24
ns
Low to High Level Output
Ripple Carry
tPHL
Propagation Delay Time
Enable G to
24
ns
High to Low Level Output
Ripple Carry
3


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