SN74LS541 データシートの表示（PDF） - Motorola => Freescale
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SN74LS541 Datasheet PDF : 3 Pages
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SN54/74LS540 • SN54/74LS541
AC CHARACTERISTICS (TA = 25°C)
Symbol
tPLH
tPLH
tPHL
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
LS540
9.0
15
LS541
LS540
12
15
ns
12
15
LS541
12
18
LS540
LS541
15
25
ns
15
32
LS540
LS541
20
38
ns
20
38
LS540
LS541
10
18
ns
10
18
LS540
LS541
15
25
ns
15
29
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
1.5 V
tPZL
1.5 V
tPLZ
≈ 1.5 V
VOL
0.5 V
Figure 3
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
tPZH
tPZL
tPLZ
tPHZ
SW1
Open
Closed
Closed
Closed
SW2
Closed
Open
Closed
Closed
Figure 5
FAST AND LS TTL DATA
5-3
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