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(1) ....................................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 Parameter Measurement Information............................ 8

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

7.1 Overview................................................................... 10

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

7.3 Device Functional Modes..........................................11

8 Power Supply Recommendations................................12

9 Layout.............................................................................12

9.1 Layout Guidelines..................................................... 12

10 Device and Documentation Support..........................13

10.1 Receiving Notification of Documentation Updates..13

10.2 Support Resources................................................. 13

10.3 Trademarks.............................................................13

10.4 Electrostatic Discharge Caution..............................13

10.5 Glossary..................................................................13

11 Mechanical, Packaging, and Orderable

Information.................................................................... 13

3 Revision History

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

Changes from Revision C (October 2003) to Revision D (February 2022)

Page

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

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

CD54HC166, CD54HCT166, CD74HC166, CD74HCT166

SCHS157D – FEBRUARY 1998 – REVISED FEBRUARY 2022

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