SN74LS74AD 查看數據表（PDF） - ON Semiconductor
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SN74LS74AD Datasheet PDF : 8 Pages
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SN74LS74A
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
VIH
Input HIGH Voltage
Min Typ Max Unit
Test Conditions
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
Input High Current
Data, Clock
IIH
Set, Clear
Data, Clock
Set, Clear
– 0.65 – 1.5
V
VCC = MIN, IIN = – 18 mA
2.7 3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
0.25 0.4
0.35 0.5
V
IOL = 4.0 mA
V
IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
20
µA
VCC = MAX, VIN = 2.7 V
40
0.1
0.2
mA VCC = MAX, VIN = 7.0 V
Input LOW Current
IIL
Data, Clock
Set, Clear
– 0.4 mA VCC = MAX, VIN = 0.4 V
– 0.8
IOS
Output Short Circuit Current (Note 1)
– 20
–100 mA
ICC
Power Supply Current
8.0
mA
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
VCC = MAX
VCC = MAX
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
fMAX
tPLH
tPHL
Parameter
Maximum Clock Frequency
Clock, Clear, Set to Output
Min Typ Max Unit
25
33
MHz
13
25
ns
25
40
ns
Test Conditions
Figure 1
Figure 1
VCC = 5.0 V
CL = 15 pF
AC SETUP REQUIREMENTS (TA = 25°C)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
tW (H)
tW (L)
ts
Clock
Clear, Set
Data Setup Time — HIGH
Data Setup Time — LOW
25
ns
Figure 1
25
ns
Figure 2
20
ns
VCC = 5.0 V
Figure 1
20
ns
th
Hold Time
5.0
ns
Figure 1
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