DM74S161 查看數據表（PDF） - Fairchild Semiconductor
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DM74S161 Datasheet PDF : 7 Pages
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Absolute Maximum Ratings(Note 1)
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
7V
5.5V
0°C to +70°C
−65°C to +150°C
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables 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
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
IOH
HIGH Level Output Current
IOL
LOW Level Output Current
fCLK
Clock Frequency (Note 2)
Clock Frequency (Note 3)
tW
Pulse Width (Note 2)
Clock
Clear (Note 5)
Pulse Width (Note 3)
Clock
Clear (Note 5)
tSU
Setup Time (Note 2)
Data
Enable P or T
Load
Clear (Note 4)
Setup Time (Note 3)
Data
Enable P or T
Load
Clear (Note 4)
tH
Hold Time (Note 2)
Data
Others
Hold Time (Note 3)
Data
Others
tREL
Load or Clear Release Time (Note 2)
Load or Clear Release Time (Note 3)
TA
Free Air Operating Temperature
Note 2: CL = 15 pF, RL = 280Ω, TA = 25°C and VCC = 5V.
Note 3: CL = 50 pF, RL = 280Ω, TA = 25°C and VCC = 5V.
Note 4: Applies only to the DM74S163 which has synchronous clear inputs.
Note 5: Applies only to the DM74S161 which has asynchronous clear inputs.
Min
4.75
2
0
0
10
10
12
12
4
12
14
14
5
14
16
16
3
0
5
2
12
14
0
Nom
5
Max
5.25
0.8
−1
20
40
35
70
Units
V
V
V
mA
mA
MHz
ns
ns
ns
ns
°C
5
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