SCHS168E November   1998  – March 2022 CD54HC243 , CD74HC243 , CD74HCT243

PRODUCTION DATA  

  1. 1 Features
  2. 2 Description
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • J|14
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3 Device Functional Modes

Table 7-1 Truth Table(1)(2)
Control Inputs HC, HCT243 Series
Data port status
OEB OEA An Bn
H H O I
L H Z Z
H L Z Z
L L I O
(1) H = High voltage level. L = Low voltage level. I = Input. O = Output (Same level as input). Z = High Impedance
(2) To prevent excess currents in the High Z modes all I/O terminals hsould be terminated with 10kΩ to 1MΩ resistors.