74LS95 查看數據表（PDF） - Motorola => Freescale
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74LS95 Datasheet PDF : 6 Pages
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SN54 / 74LS95B
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
54
0.7
Guaranteed Input LOW Voltage for
VIL
Input LOW Voltage
74
0.8
V
All Inputs
VIK
VOH
Input Clamp Diode Voltage
Output HIGH Voltage
– 0.65 – 1.5
V
VCC = MIN, IIN = – 18 mA
54
2.5 3.5
74
2.7 3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
V
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
74
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
IIH
Input HIGH Current
20
µA VCC = MAX, VIN = 2.7 V
0.1
mA VCC = MAX, VIN = 7.0 V
IIL
Input HIGH Current
– 0.4 mA VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
– 20
–100 mA VCC = MAX
ICC
Power Supply Current
21
mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Symbol
fMAX
tPLH
tPHL
Parameter
Maximum Clock Frequency
CP to Output
Limits
Min Typ Max
25
36
18
27
21
32
Unit
MHz
ns
ns
Test Conditions
VCC = 5.0 V
CL = 15 pF
AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)
Symbol
tW
ts
th
ts
th
Parameter
CP Pulse Width
Data Setup Time
Data Hold Time
Mode Control Setup Time
Mode Control Hold Time
Limits
Min Typ Max Unit
20
ns
20
ns
20
ns
20
ns
20
ns
Test Conditions
VCC = 5.0 V
FAST AND LS TTL DATA
5-173
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