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54LS161A Datasheet(PDF) 2 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) 2 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note)
If MilitaryAerospace specified devices are required
please contact the National Semiconductor Sales
OfficeDistributors for availability and specifications
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range
DM54LS and 54LS
b
55 Cto a125 C
DM74LS
0 Cto a70 C
Storage Temperature Range
b
65 Cto a150 C
Note
The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
Parameter
DM54LS161A
DM74LS161A
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 55V
Note 2
CL e 50 pF RL e 2kX TA e 25 C and VCC e 55V
2


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