Table of Contents

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

2 Description.......................................................................1

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

4 Pin Configuration and Functions...................................3

5 Specifications.................................................................. 4

5.1 Absolute Maximum Ratings........................................ 4

5.2 Recommended Operating Conditions.........................4

5.3 Thermal Information....................................................4

5.4 Electrical Characteristics.............................................5

5.5 Prerequisite for Switching Characteristics.................. 6

5.6 Switching Characteristics............................................7

6 Detailed Description........................................................8

6.1 Overview..................................................................... 8

6.2 Functional Block Diagram........................................... 8

6.3 Device Functional Modes............................................8

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

8 Power Supply Recommendations................................11

9 Layout............................................................................. 11

9.1 Layout Guidelines..................................................... 11

10 Device and Documentation Support..........................12

10.1 Receiving Notification of Documentation Updates..12

10.2 Support Resources................................................. 12

10.3 Trademarks.............................................................12

10.4 Electrostatic Discharge Caution..............................12

10.5 Glossary..................................................................12

11 Mechanical, Packaging, and Orderable

Information.................................................................... 12

3 Revision History

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

Changes from Revision B (May 2003) to Revision C (January 2022)

Page

• Updated the numbering, formatting, tables, figures, and cross-refrences throughout the document to reflect

modern data sheet standards............................................................................................................................. 1

• Updated pin names to match current TI naming conventions. MR is now CLR, Q0 is now 1Q, D0 is now 1D,

D1 is now 2D, Q1 is now 2Q, Q2 is now 3Q, D2 is now 3Q, D3 is now 4D, Q3 is now 4Q, CP is now CLK, Q4

is now 5Q, D4 is now 5D, D5 is now D6, Q5 is now 6Q, Q6 is now 7Q, D6 is now 7D, D7 is now 8D, Q7 is

now 8Q............................................................................................................................................................... 1

CD54HC273, CD74HC273

CD54HCT273, CD74HCT273

SCHS174C – FEBRUARY 1998 – REVISED JANUARY 2022

www.ti.com

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