SN74LS109A 查看數據表（PDF） - Motorola => Freescale
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SN74LS109A Datasheet PDF : 4 Pages
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SN54 / 74LS109A
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
Min
Typ
Max
Unit
54
4.5
5.0
5.5
V
74
4.75
5.0
5.25
54
– 55
25
125
°C
74
0
25
70
IOH
Output Current — High
IOL
Output Current — Low
54, 74
54
74
– 0.4
mA
4.0
mA
8.0
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
VIL
VIK
VOH
54
Input LOW Voltage
74
Input Clamp Diode Voltage
54
Output HIGH Voltage
74
0.7
0.8
– 0.65 – 1.5
2.5
3.5
2.7
3.5
VOL
Output LOW Voltage
54, 74
74
0.25 0.4
0.35 0.5
Input HIGH Current
J, K, Clock
20
IIH
Set, Clear
40
J, K, Clock
0.1
Set, Clear
0.2
Input LOW Current
IIL
J, K, Clock
Set, Clear
– 0.4
– 0.8
IOS
Output Short Circuit Current (Note 1) – 20
– 100
ICC
Power Supply Current
8.0
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)
Limits
Symbol
Parameter
Min Typ Max
fMAX
tPLH
tPHL
Maximum Clock Frequency
Clock, Clear, Set to Output
25
33
13
25
25
40
Guaranteed Input LOW Voltage for
V
All Inputs
V
VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
V
or VIL per Truth Table
V
IOL = 4.0 mA
V
IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
µA VCC = MAX, VIN = 2.7 V
mA VCC = MAX, VIN = 7.0 V
mA VCC = MAX, VIN = 0.4 V
mA VCC = MAX
mA VCC = MAX
Unit
MHz
ns
ns
Test Conditions
VCC = 5.0 V
CL = 15 pF
AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min Typ Max Unit
tW
Clock High Clear, Set Pulse Width
25
ns
Data Setup Time — HIGH
20
ns
ts
Data Setup Time — LOW
20
ns
th
Hold time
5.0
ns
Test Conditions
VCC = 5.0 V
FAST AND LS TTL DATA
5-182
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