SN54LVC540A, SN74LVC540A

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SCAS297N – JANUARY 1993 – REVISED JUNE 2014

7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

(1)

SN54LVC540A

SN74LVC540A

UNIT

MIN

MAX

MIN

MAX

Operating

2

3.6

1.65

3.6

Supply voltage

V

Data retention only

1.5

1.5

High-level input voltage

1.7

V

2

2

Low-level input voltage

0.7

V

0.8

0.8

Input voltage

0

5.5

0

5.5

V

High or low state

0

0

Output voltage

V

3-state

0

5.5

0

5.5

–4

–8

High-level output current

mA

–12

–12

–24

–24

4

8

Low-level output current

mA

12

12

24

24

Operating free-air temperature

–55

125

–40

125

°C

(1)

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

7.4 Thermal Information

SN74LVC540A

DB

DGV

DW

NS

PW

UNIT

20 PINS

Junction-to-ambient thermal resistance

94.5

114.7

88.3

74.7

102.5

56.2

29.8

51.1

40.5

35.9

Junction-to-board thermal resistance

49.7

56.2

50.9

42.3

53.5

°C/W

Junction-to-top characterization parameter

18.1

0.8

20.0

14.3

2.2

Junction-to-board characterization parameter

49.2

55.5

50.5

41.9

52.9

–

–

–

–

–

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

Copyright © 1993–2014, Texas Instruments Incorporated

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