SCPS201F August   2009  – September 2026 TCA9535

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 I2C Interface Timing Requirements
    7. 5.7 Switching Characteristics
    8. 5.8 Typical Characteristics
  7.   Parameter Measurement Information
  8. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 5V Tolerant I/O Ports
      2. 6.3.2 Hardware Address Pins
      3. 6.3.3 Interrupt ( INT) Output
    4. 6.4 Device Functional Modes
      1. 6.4.1 Power-On Reset (POR)
      2. 6.4.2 Powered-Up
    5. 6.5 Programming
      1. 6.5.1 I2C Interface
        1. 6.5.1.1 Bus Transactions
          1. 6.5.1.1.1 Writes
          2. 6.5.1.1.2 Reads
      2. 6.5.2 Device Address
      3. 6.5.3 Control Register and Command Byte
    6. 6.6 Register Maps
      1. 6.6.1 Register Descriptions
  9. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
        1. 7.2.1.1 Calculating Junction Temperature and Power Dissipation
        2. 7.2.1.2 Minimizing ICC When I/O is Used to Control LED
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      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
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information

7.1 Application Information

Applications of the TCA9535 has the device connected as a target to an I2C controller (processor), and the I2C bus may contain any number of other target devices. The TCA9535 is typically in a remote location from the controller, placed close to the GPIOs to which the controller needs to monitor or control.

IO Expanders such as the TCA9535 are typically used for controlling LEDs (for feedback or status lights), controlling enable or reset signals of other devices, and even reading the outputs of other devices or buttons.