SN74LS541 查看數據表（PDF） - ON Semiconductor
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SN74LS541 Datasheet PDF : 6 Pages
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SN74LS541
AC CHARACTERISTICS (TA = 25°C)
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay,
Data to Output
Output Enable Time
to HIGH Level
Output Enable Time
to LOW Level
Output Disable Time
to HIGH Level
Output Disable Time
to LOW Level
Limits
Min
Typ
Max Unit
12
15
ns
12
18
15
32
ns
20
38
ns
10
18
ns
15
29
ns
Test Conditions
VCC = 5.0 V
CL = 45 pF
RL = 667 Ω
CL = 5.0 pF
AC WAVEFORMS
VIN
VOUT
1.3 V
tPLH
1.3 V
Figure 1.
1.3 V
tPHL
1.3 V
VIN
VOUT
1.3 V
tPLH
1.3 V
1.3 V
tPHL
1.3 V
Figure 2.
TO OUTPUT
UNDER TEST
VCC
RL
SW1
5 kΩ
CL*
SW2
VE
VE
VOUT
1.5 V
tPZL
1.5 V
Figure 3.
1.5 V
tPLZ
≈ 1.5 V
VOL
0.5 V
VE
VE
VOUT
1.5 V
tPZH
1.5 V
Figure 4.
1.5 V
tPHZ
≥VOH
≈ 1.5 V
0.5 V
SWITCH POSITIONS
SYMBOL
SW1
SW2
tPZH
Open
Closed
tPZL
Closed
Open
tPLZ
Closed
Closed
tPHZ
Closed
Closed
Figure 5.
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