TIDUFB5A December   2024  – January 2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Redundant Input Supplies
      2. 2.2.2 Ethernet Ring
      3. 2.2.3 Audio Video Bridging (AVB)
      4. 2.2.4 Low-Power Mode and Wake
      5. 2.2.5 Limp Home Mode
      6. 2.2.6 SPI Daisy Chain
      7. 2.2.7 Reset Aggregation
    3. 2.3 Highlighted Products
      1. 2.3.1  AM263P4-Q1
      2. 2.3.2  DP83TG721S-Q1
      3. 2.3.3  DP83TD555J-Q1
      4. 2.3.4  TPS653860-Q1
      5. 2.3.5  TPS2HCS10-Q1
      6. 2.3.6  TPS2HCS05-Q1
      7. 2.3.7  DRV8245S-Q1
      8. 2.3.8  TIC12400-Q1
      9. 2.3.9  LM74900-Q1
      10. 2.3.10 LM74703-Q1
      11. 2.3.11 INA186-Q1
      12. 2.3.12 TPS7B81-Q1
      13. 2.3.13 TPS3762-Q1
      14. 2.3.14 TPS62903-Q1
      15. 2.3.15 TPS62902-Q1
      16. 2.3.16 TPS7B4256-Q1
      17. 2.3.17 TPS1211-Q1
      18. 2.3.18 TPS1HC30-Q1
      19. 2.3.19 TPS4HC120-Q1
      20. 2.3.20 TPS2HC08-Q1
      21. 2.3.21 TPS1HC04-Q1
      22. 2.3.22 DRV8714S-Q1
      23. 2.3.23 DRV8145S-Q1
      24. 2.3.24 DRV81602-Q1
      25. 2.3.25 TPS1214-Q1
      26. 2.3.26 TCAN1043A-Q1
      27. 2.3.27 TCAN1044-Q1
      28. 2.3.28 TCAN1046V-Q1
      29. 2.3.29 SN3257-Q1
      30. 2.3.30 TLIN1021A-Q1
      31. 2.3.31 TLIN1024A-Q1
      32. 2.3.32 TAS6754-Q1
      33. 2.3.33 TMUX1308-Q1
      34. 2.3.34 TPLD1201-Q1
      35. 2.3.35 SN74CBTLV3861-Q1
      36. 2.3.36 TXE8124-Q1
      37. 2.3.37 TCAL9539-Q1
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
    4. 3.4 Test Results
      1. 3.4.1 Redundant Input Supply
      2. 3.4.2 Power Sequence
      3. 3.4.3 Reset Aggregation
      4. 3.4.4 Low Power Mode Tests
        1. 3.4.4.1 Low Power Mode Quiescent Current
        2. 3.4.4.2 Wake Measurement Results
        3. 3.4.4.3 CAN Wake
        4. 3.4.4.4 LIN Wake
        5. 3.4.4.5 High-Side Switch Controller Wake
        6. 3.4.4.6 Smart eFuse Wake
        7. 3.4.4.7 High-Side Switch Wake
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Layout
      3. 4.1.3 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
  12. 6Revision History

2.3.37 TCAL9539-Q1

The TCAL9539-Q1 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08V to 3.6V VCC operation. The device supports 100kHz (Standard-mode), 400kHz (Fast-mode), and 1MHz (fast-mode-plus) I 2C clock frequencies. I/O expanders such as the TCAL9539-Q1 provide a simple approach when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so on. The TCAL9539-Q1 has Agile I/O ports which include additional features designed to enhance the I/O performance in terms of speed, power consumption and EMI. The additional features are: programmable output drive strength, programmable pullup and pulldown resistors, latchable inputs, maskable interrupt, interrupt status register, and programmable open.