SN54LVC257A, SN74LVC257A

SCAS294O – JANUARY 1993 – REVISED JUNE 2015

www.ti.com

7.3 Recommended Operating Conditions

See

(1)

SN54LVC257A

SN74LVC257A

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

Output voltage

0

0

V

–4

–8

High-level output current

mA

–12

–12

–24

–24

4

8

Low-level output current

mA

12

12

24

24

Δt/Δv

Input transition rise or fall rate

10

10

ns/V

Operating free-air temperature

–55

125

–40

85

°C

(1)

Implications of Slow or Floating CMOS Inputs, SCBA004.

7.4 Thermal Information: 16-Pin Packages

SN54LVC257A, SN74LVC257A

UNIT

16 PINS

Junction-to-ambient thermal resistance

73

82

64

108

°C/W

(1)

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

report, SPRA953.

(2)

The package thermal impedance is calculated in accordance with JESD 51-7.

7.5 Thermal Information: 20-Pin Package

SN54LVC257A

UNIT

20 PINS

Junction-to-ambient thermal resistance

39

°C/W

(1)

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

report, SPRA953.

(2)

The package thermal impedance is calculated in accordance with JESD 51-5.

6

Submit Documentation Feedback

Copyright © 1993–2015, Texas Instruments Incorporated

Product Folder Links: SN54LVC257A SN74LVC257A