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SN54-74LS168 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. SN54-74LS168
Description  BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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SN54-74LS168 Datasheet(HTML) 5 Page - ON Semiconductor

   
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5-5
FAST AND LS TTL DATA
SN54/74LS168
• SN54/74LS169
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Sb l
P
Limits
Ui
T
C
di i
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
fMAX
Maximum Clock Frequency
25
32
MHz
V5 0 V
tPLH
tPHL
Propagation Delay,
Clock to TC
23
23
35
35
ns
V5 0 V
tPLH
tPHL
Propagation Delay,
Clock to any Q
13
15
20
23
ns
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
Propagation Delay,
CET to TC
15
15
20
20
ns
CL = 15 pF
tPLH
tPHL
Propagation Delay,
U/D to TC
17
19
25
29
ns
AC SETUP REQUIREMENTS (TA = 25°C)
Sb l
P
Limits
Ui
T
C
di i
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tW
Clock Pulse Width
25
ns
V5 0 V
ts
Setup Time,
Data or Enable
20
ns
V5 0 V
ts
Setup Time
PE
25
ns
VCC = 5.0 V
ts
Setup Time
U/D
30
ns
th
Hold Time
Any Input
0
ns


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