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SN54LS540 Datasheet(PDF) 3 Page - Motorola, Inc

Part No. SN54LS540
Description  OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

SN54LS540 Datasheet(HTML) 3 Page - Motorola, Inc

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AC WAVEFORMS
1.5 V
1.5 V
1.5 V
1.3 V
1.3 V
1.3 V
1.3 V
VIN
VOUT
tPLH
tPHL
1.3 V
1.3 V
VIN
VOUT
SW2
CL*
5 kΩ
SW1
VCC
RL
TO OUTPUT
UNDER TEST
1.3 V
tPLH
tPHL
VE
VE
VOUT
VE
VE
VOUT
tPHZ
1.5 V
1.5 V
tPZL
tPLZ
VOL
1.5 V
≥VOH
0.5 V
tPZH
1.3 V
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
≈ 1.5 V
0.5 V
≈ 1.5 V
SWITCH POSITIONS
5-570
FAST AND LS TTL DATA
SN54/74LS540
• SN54/74LS541
AC CHARACTERISTICS (TA = 25°C)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
Propagation Delay,
Data to Output
LS540
9.0
15
ns
VCC = 5.0 V
CL = 45 pF
RL = 667 Ω
tPLH
Propagation Delay,
Data to Output
LS541
12
15
ns
VCC = 5.0 V
CL = 45 pF
RL = 667 Ω
tPHL
Propagation Delay,
Data to Output
LS540
12
15
ns
VCC = 5.0 V
CL = 45 pF
RL = 667 Ω
tPHL
LS541
12
18
VCC = 5.0 V
CL = 45 pF
RL = 667 Ω
tPZH
Output Enable Time
to HIGH Level
LS540
15
25
ns
CL = 45 pF
RL = 667 Ω
tPZH
Output Enable Time
to HIGH Level
LS541
15
32
ns
L = 667 Ω
tPZL
Output Enable Time
to LOW Level
LS540
20
38
ns
tPZL
Output Enable Time
to LOW Level
LS541
20
38
ns
tPHZ
Output Disable Time
to HIGH Level
LS540
10
18
ns
CL = 5.0 pF
tPHZ
Output Disable Time
to HIGH Level
LS541
10
18
ns
CL = 5.0 pF
tPLZ
Output Disable Time
to LOW Level
LS540
15
25
ns
CL = 5.0 pF
tPLZ
Output Disable Time
to LOW Level
LS541
15
29
ns
SYMBOL
SW1
SW2
tPZH
Open
Closed
tPZL
Closed
Open
tPLZ
Closed
Closed
tPHZ
Closed
Closed


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