74LS168 National Semiconductor, 74LS168 Datasheet - Page 3

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74LS168

Manufacturer Part Number
74LS168
Description
54LS168 Synchronous Bi-Directional BCD Decade Counter
Manufacturer
National Semiconductor
Datasheet

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V
V
V
I
I
I
I
I
Symbol
I
IH
IL
OS
CC
Electrical Characteristics
Note 1 All typicals are at V
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3 I
Switching Characteristics
V
I
OH
OL
CC
e a
Symbol
f
t
t
t
t
t
t
t
t
Max
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
CC
is measured with all outputs open and all inputs grounded
5 0V T
Input Clamp Voltage
High Level Output Voltage
Low Level Output Voltage
Input Current
Input Voltage
High Level Input Current
Low Level Input Current
Short Circuit Output Current
Supply Current
A
Parameter
e a
CC
e
25 C (See Section 1 for test waveforms and output load)
Max
5V T
Maximum Clock Frequency
Propagation Delay
CP to Q
Propagation Delay
CP to TC
Propagation Delay
CET to TC
Propagation Delay
U D to TC
A
e
25 C
n
Parameter
V
V
V
V
V
V
V
V
V
V
over recommended operating free air temperature range (unless otherwise noted)
CC
CC
IL
CC
IH
CC
CC
CC
CC
CC
e
e
e
e
e
e
e
e
e
e
Max V
Min V
Min I
Min I
Min I
Max V
Max V
Max V
Max (Note 2)
Max (Note 3)
I
OH
OL
IL
IH
e b
I
I
I
e
e
e
e
e
e
e
Conditions
Max
10 0V
2 7V
0 5V
Min
Max
18 mA
Max
3
Inputs
CET
Data
CP PE U D CEP
CET
Min
25
C
54LS168
L
e
15 pF
b
b
b
b
Min
2 5
0 5
30
60
20
Max
20
20
30
30
15
20
25
25
(Note 1)
Typ
b
b
b
b
b
Max
0 4
0 1
20
40
34
400
400
800
100
1 5
Units
MHz
ns
ns
ns
ns
Units
mA
mA
mA
V
V
V
A
A

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