SN54LVC257A, SN74LVC257A

SCAS294O – JANUARY 1993 – REVISED JUNE 2015

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Table of Contents

9.1

Overview ................................................................. 10

1

Features .................................................................. 1

9.2

Functional Block Diagram ....................................... 10

2

Applications ........................................................... 1

9.3

Feature Description................................................. 10

3

Description ............................................................. 1

9.4

Device Functional Modes........................................ 10

4

Revision History..................................................... 2

10

Application and Implementation........................ 11

5

Device Options....................................................... 3

10.1

Application Information.......................................... 11

6

Pin Configuration and Functions ......................... 4

10.2

Typical Application ............................................... 11

7

Specifications......................................................... 5

11

Power Supply Recommendations ..................... 13

7.1

Absolute Maximum Ratings ...................................... 5

12

Layout................................................................... 13

7.2

ESD Ratings.............................................................. 5

12.1

Layout Guidelines ................................................. 13

7.3

Recommended Operating Conditions ...................... 6

12.2

Layout Example .................................................... 13

7.4

Thermal Information: 16-Pin Packages..................... 6

13

Device and Documentation Support ................. 14

7.5

Thermal Information: 20-Pin Package ...................... 6

13.1

Documentation Support ........................................ 14

7.6

Electrical Characteristics........................................... 7

13.2

Related Links ........................................................ 14

7.7

SN54LVC257A Switching Characteristics ................ 7

13.3

Community Resources.......................................... 14

7.8

SN74LVC257A Switching Characteristics ................ 7

13.4

Trademarks ........................................................... 14

7.9

Operating Characteristics.......................................... 8

13.5

Electrostatic Discharge Caution ............................ 14

7.10

Typical Characteristics ............................................ 8

13.6

Glossary ................................................................ 14

8

Parameter Measurement Information .................. 9

14

Mechanical, Packaging, and Orderable

9

Detailed Description ............................................ 10

Information ........................................................... 14

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision N (June 2005) to Revision O

Page

•

Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional

Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device

and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1

2

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