SN74LS221 データシートの表示（PDF） - ON Semiconductor
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SN74LS221 Datasheet PDF : 7 Pages
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SN74LS221
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
VT+
Parameter
Positive-Going Threshold
Voltage at C Input
Min Typ Max Unit
Test Conditions
1.0
2.0
V
VCC = MIN
VT−
Negative-Going Threshold
0.7
0.8
Voltage at C Input
V
VCC = MIN
VT+
Positive-Going Threshold
Voltage at B Input
1.0
2.0
V
VCC = MIN
VT−
Negative-Going Threshold
0.8
0.9
Voltage at B Input
V
VCC = MIN
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
A Input
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
A Input
VIK
Input Clamp Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
IIH
Input HIGH Current
Input LOW Current
IIL
Input A
Input B
Clear
− 1.5
V
VCC = MIN, IIN = − 18 mA
2.7
3.4
V
VCC = MIN, IOH = MAX
0.35 0.5
V
IOL = 8.0 mA
VCC = MIN
20
μA VCC = MAX, VIN = 2.7 V
0.1
mA VCC = MAX, VIN = 7.0 V
− 0.4
− 0.8
mA
VCC = MAX, VIN = 0.4 V
− 0.8
IOS
Short Circuit Current (Note 1)
− 20
− 100 mA VCC = MAX
Power Supply Current
ICC
Quiescent
Triggered
4.7
11
mA VCC = MAX
19
27
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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