SCHS239D November   1998  – May 2024 CD54AC161 , CD74AC161

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 ESD Ratings
    3. 4.3 Recommended Operating Conditions
    4. 4.4 Thermal Information
    5. 4.5 Electrical Characteristics
    6. 4.6 Timing Requirements
    7. 4.7 Switching Characteristics
    8. 4.8 Timing Diagrams
    9. 4.9 Operating Characteristics
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support (Analog)
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • N|16
  • D|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Pin Configuration and Functions

CD54AC161 CD74AC161 CD54AC161 F Package, CD74AC161 E or M Package (Top View) Figure 3-1 CD54AC161 F Package, CD74AC161 E or M Package (Top View)
Pin Functions
NAME PIN TYPE DESCRIPTION
CLR 1 I Clear, active low
CLK 2 I Clock, rising edge triggered
A 3 I Load data A
B 4 I Load data B
C 5 I Load data C
D 6 I Load data D
ENP 7 I Count enable, does not affect RCO
GND 8 — Ground
LOAD 9 I Parallel load, active low
ENT 10 I Count enable, affects RCO
QD 11 O QD output
QC 12 O QC output
QB 13 O QB output
QA 14 O QA output
RCO 15 O Ripple-carry output
VCC 16 __ Supply