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54LS161A Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54LS161A
Description  Synchronous 4-Bit Binary Counters
Download  12 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

54LS161A Datasheet(HTML) 4 Page - National Semiconductor (TI)

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’LS161 Switching Characteristics
at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) (Continued)
From (Input)
RL e 2kX
Symbol
Parameter
To (Output)
CL e 15 pF
CL e 50 pF
Units
Min
Max
Min
Max
tPLH
Propagation Delay Time
Clock to Any Q
24
30
ns
Low to High Level Output
(Load Low)
tPHL
Propagation Delay Time
Clock to Any Q
27
38
ns
High to Low Level Output
(Load Low)
tPLH
Propagation Delay Time
Enable T to
14
27
ns
Low to High Level Output
Ripple Carry
tPHL
Propagation Delay Time
Enable T to
15
27
ns
High to Low Level Output
Ripple Carry
tPHL
Propagation Delay Time
Clear to
28
45
ns
High to Low Level Output
Any Q
Recommended Operating Conditions
Symbol
Parameter
DM54LS163A
DM74LS163A
Units
Min
Nom
Max
Min
Nom
Max
VCC
Supply Voltage
45
5
55
475
5
525
V
VIH
High Level Input Voltage
2
2
V
VIL
Low Level Input Voltage
07
08
V
IOH
High Level Output Current
b
04
b
04
mA
IOL
Low Level Output Current
4
8
mA
fCLK
Clock Frequency (Note 1)
0
25
0
25
MHz
Clock Frequency (Note 2)
0
20
0
20
MHz
tW
Pulse Width
Clock
20
6
20
6
ns
(Note 1)
Clear
20
9
20
9
Pulse Width
Clock
25
25
ns
(Note 2)
Clear
25
25
tSU
Setup Time
Data
20
8
20
8
(Note 1)
Enable P
25
17
25
17
ns
Load
25
15
25
15
Setup Time
Data
20
20
(Note 2)
Enable P
30
30
ns
Load
30
30
tH
Hold Time
Data
0
b
30
b
3
ns
(Note 1)
Others
0
b
30
b
3
Hold Time
Data
5
5
ns
(Note 2)
Others
5
5
tREL
Clear Release Time (Note 1)
20
20
ns
Clear Release Time (Note 2)
25
25
ns
TA
Free Air Operating Temperature
b
55
125
0
70
C
Note 1
CL e 15 pF RL e 2kX TA e 25 C and VCC e 5V
Note 2
CL e 50 pF RL e 2kX TA e 25 C and VCC e 5V
4


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