SCPS254D January   2014  – October 2021 TCA9539-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 RESET Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 I/O Port
      2. 8.3.2 RESET Input
      3. 8.3.3 Interrupt ( INT) Output
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-On Reset
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
    6. 8.6 Register Maps
      1. 8.6.1 Device Address
      2. 8.6.2 Control Register And Command Byte
      3. 8.6.3 Register Descriptions
        1. 8.6.3.1 Bus Transactions
          1. 8.6.3.1.1 Writes
          2. 8.6.3.1.2 Reads
  9. 9 Power Supply Recommendations
    1. 9.1 Power-On Reset Requirements
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary

Package Options

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

3 Description

The TCA9539-Q1 is a 24-pin device that provides 16 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus protocol). The device can operate with a power supply voltage (VCC) range from 1.65 V to 3.6 V. The device supports 100 kHz (I2C Standard mode) and 400 kHz (I2C Fast mode) clock frequencies. I/O expanders such as the TCA9539-Q1 provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.

The features of the TCA9539-Q1 include an interrupt that is generated on the INT pin whenever an input port changes state. The A0 and A1 hardware selectable address pins allow up to four TCA9539-Q1 devices on the same I2C bus. The device can be reset to its default state by cycling the power supply and causing a power-on reset. Also, the TCA9539-Q1 has a hardware RESET pin that can be used to reset the device to its default state.

The TCA9539-Q1 I2C I/O expander is qualified for automotive applications.

Device Information
PART NUMBERPACKAGE TYPE(1)BODY SIZE (NOM)
TCA9539-Q1TSSOP (24)7.80 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.

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