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DM74AS161N 数据表(PDF) 5 Page - Fairchild Semiconductor

部件名 DM74AS161N
功能描述  Synchronous 4-Bit Counter with Asynchronous Clear . Synchronous 4-Bit Counter
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

DM74AS161N 数据表(HTML) 5 Page - Fairchild Semiconductor

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Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C
Note 2: The output conditions have been chosen to produce a current that closely approximates one half of the true short circuit output current, IOS.
Switching Characteristics
over recommended operating free air temperature range
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIK
Input Clamp Voltage
VCC = 4.5V, II = −18 mA
−1.2
V
VOH
HIGH Level
IOH = −2 mA,
VCC − 2V
Output Voltage
VCC = 4.5 to 5.5V
VOL
LOW Level
VCC = 4.5V,
0.35
0.5
V
Output Voltage
IOL = 20 mA
II
Input Current @ Max
VCC = 5.5V,
LOAD
0.3
Input Voltage
VIH = 7V
ENT
0.2
mA
Others
0.1
IIH
HIGH Level Input Current
VCC = 5.5V,
LOAD
60
VIH = 2.7V
ENT
40
µA
Others
20
IIL
LOW Level Input Current
VCC = 5.5V,
LOAD
−0.5
VIL = 0.4V
ENT
−1mA
Others
−0.5
IO (Note 2) Output Drive Current
VCC = 5.5V, VO = 2.25V
−30
−112
mA
ICC
Supply Current
VCC = 5.5V
35
53
mA
Symbol
Parameter
Conditions
From
To
Min
Max
Units
fMAX
Maximum Clock Frequency
VCC = 4.5V to 5.5V
75
MHz
tPHL
Propagation Delay Time
RL = 500Ω
Clock
Ripple Carry
2
12.5
ns
HIGH-to-LOW Level Output
CL = 50 pF
tPLH
Propagation Delay Time
Clock
Ripple Carry
1
8
ns
LOW-to-HIGH Level Output
with Load HIGH
tPLH
Propagation Delay Time
Clock
Ripple Carry
3
16.5
ns
LOW-to-HIGH Level Output
with Load LOW
tPLH
Propagation Delay Time
Clock
Any Q
1
7
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Clock
Any Q
2
13
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
En T
Ripple Carry
1.5
9
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
En T
Ripple Carry
1
8.5
ns
HIGH-to-LOW Level Output
tPHL
Propagation Delay Time
CLEAR
Any Q
2
13
ns
HIGH-to-LOW Level Output
(DM74AS161)
tPHL
Propagation Delay Time
CLEAR
Ripple Carry
2
12.5
ns
HIGH-to-LOW Level Output
(DM74AS161)


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