IN74LS161 データシートの表示（PDF） - IK Semicon Co., Ltd
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IN74LS161 Datasheet PDF : 6 Pages
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IN74LS161
FUNCTION TABLE
Inputs
Outputs
Reset Load Enable Enable Clock Q0 Q1 Q2 Q3
P
T
Function
L
X
X
X
X
L L L L Reset to “0”
H
L
X
X
P0 P1 P2 P3 Preset Data
H
H
X
L
No change
No count
H
H
L
X
No change
No count
H
H
H
H
Count up
Count
H
X
X
X
No change
No count
X=don’t care
P0,P1,P2,P3 = logic level of Data inputs
Ripple Carry Out = Enable T • Q0 • Q1 • Q2 • Q3
MAXIMUM RATINGS*
Symbol
VCC
VIN
VOUT
Tstg
Parameter
Supply Voltage
Input Voltage
Output Voltage
Storage Temperature Range
Value
Unit
7.0
V
7.0
V
5.5
V
-65 to +150
°C
*Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VIH
VIL
IOH
IOL
fclock
tw(clock)
tw(reset)
tsu
th
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock frequency
Width of clock pulse
Width of reset pulse
Data inputs P0, P1, P2, P3
Setup time
Enable P or T
Load
Hold time at any input
Ambient Temperature Range
Min Max Unit
4.75 5.25
V
2.0
V
0.8
V
-0.4 mA
8.0 mA
0
25 MHz
25
ns
20
ns
20
20
ns
20
3
ns
0
+70 °C
Rev. 00
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