SN74LS540N datasheet(3/5 Pages) MOTOROLA

Part #	SN74LS540N

Description	OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

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Manufacturer	MOTOROLA [Motorola, Inc]

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AC WAVEFORMS

1.5 V

1.3 V

VIN

VOUT

tPLH

tPHL

1.3 V

VIN

VOUT

SW2

CL*

5 kΩ

SW1

VCC

RL

TO OUTPUT

UNDER TEST

1.3 V

tPLH

tPHL

VE

VOUT

VE

VOUT

tPHZ

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

tPHZ

Closed

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SN74LS540N Datasheet(PDF) 3 Page - Motorola, Inc

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