SN74LS241D 查看數據表（PDF） - Motorola => Freescale
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SN74LS241D Datasheet PDF : 6 Pages
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SN54/74LS240 • SN54/74LS241 • SN54/74LS244
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
VIL
Input LOW Voltage
74
0.7
Guaranteed Input LOW Voltage for
0.8
V All Inputs
VT+–VT–
VIK
VOH
VOL
Hysteresis
0.2
0.4
Input Clamp Diode Voltage
– 0.65 – 1.5
Output HIGH Voltage
54, 74 2.4
3.4
54, 74 2.0
Output LOW Voltage
54, 74
74
0.25 0.4
0.35 0.5
V VCC = MIN
V VCC = MIN, IIN = – 18 mA
V VCC = MIN, IOH = – 3.0 mA
V VCC = MIN, IOH = MAX
V IOL = 12 mA
V IOL = 24 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IOZH
IOZL
IIH
IIL
IOS
Output Off Current HIGH
Output Off Current LOW
Input HIGH Current
Input LOW Current
Output Short Circuit Current (Note 1) – 40
Power Supply Current
Total, Output HIGH
20
– 20
20
0.1
– 0.2
– 225
µA VCC = MAX, VOUT = 2.7 V
µA VCC = MAX, VOUT = 0.4 V
µA VCC = MAX, VIN = 2.7 V
mA VCC = MAX, VIN = 7.0 V
mA VCC = MAX, VIN = 0.4 V
mA VCC = MAX
27
Total, Output LOW LS240
ICC
LS241/244
44
46
mA VCC = MAX
Total at HIGH Z
LS240
50
LS241/244
54
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 Unit
tPLH
tPHL
Propagation Delay, Data to Output
LS240
9.0
12
14
18
ns
tPLH
tPHL
Propagation Delay, Data to Output
LS241 / 244
12
12
18
18
ns
tPZH
Output Enable Time to HIGH Level
15
23
ns
tPZL
Output Enable Time to LOW Level
20
30
ns
tPLZ
Output Disable Time from LOW Level
15
25
ns
tPHZ
Output Disable Time from HIGH Level
10
18
ns
Test Conditions
CL = 45 pF,
RL = 667 Ω
CL = 5.0 pF,
RL = 667 Ω
FAST AND LS TTL DATA
5-389
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