SLVSH94 May   2026 TPS26742-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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  Recommended Capacitance
    6. 6.6  Power Supply Characteristics
    7. 6.7  Power Consumption Characteristics
    8. 6.8  Power Path Supervisory Characteristics
    9. 6.9  CC Cable Detection Characteristics
    10. 6.10 Legacy Charging Characteristics
    11. 6.11 Px_VCONN Switch Characteristics
    12. 6.12 CC PHY Characteristics
    13. 6.13 Thermal Shutdown Characteristics
    14. 6.14 Oscillator Characteristics
    15. 6.15 ADC Characteristics
    16. 6.16 Liquid Detection Characteristics
    17. 6.17 Input/Output (I/O) Characteristics (P0_GPIOx)
    18. 6.18 Input/Output (I/O) Characteristics (P1_GPOx)
    19. 6.19 I2C Requirements and Characteristics
    20. 6.20 UART
    21. 6.21 SYNC output
    22. 6.22 PWM Timer
    23. 6.23 Flash Memory Characteristics
    24. 6.24 Boot Timing
    25. 6.25 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Power Supply
        1. 8.3.1.1 Power-On and Supervisory Functions
      2. 8.3.2  Cable Plug and Orientation Detection
        1. 8.3.2.1 Configured as a Source
      3. 8.3.3  VCONN Power Path
        1. 8.3.3.1 Current Clamp
        2. 8.3.3.2 Px_VCONN Local Overtemperature Shut Down (OTSD)
        3. 8.3.3.3 Px_VCONN OVP
        4. 8.3.3.4 Px_VCONN UVLO
        5. 8.3.3.5 Px_VCONN RCP
      4. 8.3.4  USB-PD Physical Layer
        1. 8.3.4.1 USB-PD Encoding and Signaling
        2. 8.3.4.2 USB-PD Bi-Phase Marked Coding
        3. 8.3.4.3 USB-PD BMC Transmitter
        4. 8.3.4.4 USB-PD BMC Receiver
        5. 8.3.4.5 Squelch Receiver
      5. 8.3.5  DBG_SDA, DBG_SCL and DP/DM Overview
        1. 8.3.5.1 Closed Chassis Debugging and Updating Flash
          1. 8.3.5.1.1 I2C4 Access For Closed-chassis Debugging
          2. 8.3.5.1.2 UART Access for Closed-chassis Debugging
        2. 8.3.5.2 BC1.2 and Legacy Charging Functionality
          1. 8.3.5.2.1 Charging Downstream Port (CDP) Mode
          2. 8.3.5.2.2 Dedicated Charging Port (DCP) Mode
      6. 8.3.6  Liquid Detection
      7. 8.3.7  Local Interconnect Network (LIN) Support
      8. 8.3.8  Thermal Shutdown
      9. 8.3.9  ADC
        1. 8.3.9.1 ADC Divider Ratios
      10. 8.3.10 VIN Power Foldback
      11. 8.3.11 Thermal Foldback
      12. 8.3.12 DisplayPort Hot-Plug Detect (HPD)
      13. 8.3.13 General GPIO
        1. 8.3.13.1 P0_GPIOx
        2. 8.3.13.2 P1_GPOx
      14. 8.3.14 ENSD Functionality
      15. 8.3.15 Px_SYNC Output
      16. 8.3.16 Pulse-Width Modulation (PWM) Output
      17. 8.3.17 I2C Interface
        1. 8.3.17.1 I2C Interface Hardware
        2. 8.3.17.2 I2C Interface Description
        3. 8.3.17.3 I2C Clock Stretching
        4. 8.3.17.4 Unique Address Interface
        5. 8.3.17.5 I2C Address Setting
      18. 8.3.18 System Power Management (SPM) Across Ports
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pin Strapping to Configure Default Behavior (CONFIG)
      2. 8.4.2 Power States
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 CC Pin Recommendations
        2. 9.2.1.2 TI Firmware Update (TFU)
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Dual-Port SPR Charger
    4. 9.4 Power Supply Recommendations
      1. 9.4.1 Input Power Supply
      2. 9.4.2 5V Power Supply
      3. 9.4.3 3.3V Power Supply
      4. 9.4.4 1.35V Power Supply
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 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
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.3.4.4 USB-PD BMC Receiver

The receiver block of the TPS26742-Q1 is designed to receive a signal that follows the allowed Rx masks defined in the USB PD specification. The receive thresholds and hysteresis come from this mask.

Figure 8-13 shows an example of a multi-drop USB-PD connection (only the CC wire). This connection has the typical Sink (device) to Source (host) connection, and also includes cable USB-PD Tx/Rx blocks. Only one system transmits at a time, all other systems are Hi-Z (ZBMCRX). The USB-PD Specification also specifies the capacitance on the wire, as well as a typical DC bias setting circuit for attach detection.

TPS26742-Q1 Example USB-PD Multi-Drop Configuration Figure 8-13 Example USB-PD Multi-Drop Configuration