SLLU368 april   2023

 

  1.   Description
  2.   Features
  3. 1Evaluation Module Overview
    1. 1.1 Kit Contents
  4. 2Operating the EVM
    1. 2.1 Setup
      1. 2.1.1 Single Supply Operation
      2. 2.1.2 Dual Supply Operation
    2. 2.2 Operating the THVD24X2VEVM in Default Setup
    3. 2.3 Operating the THVD24X2VEVM With Modifications
      1. 2.3.1 Single-ended Bus Modification Operational Modes
      2. 2.3.2 Differential Signal Bus Modification Operational Mode
  5. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  6. 4Additional Information
    1. 4.1 Trademarks
  7. 5References

2.1.2 Dual Supply Operation

The THVD24X2V family of transceivers in the D (SOIC) package from TI can have an additional logic supply pin, VIO. In dual supply operation, the digital circuit supply (which supplies the R, D, /RE, and DE pins) can be held at a low voltage. This voltage typically ranges from 1.65 V to 5 V to allow interfacing with a RS-485 transceiver to digital systems using 1.8 V logic. For dual supply operation, J7 is left open.

Table 2-2 Dual Supply Operation Jumper Configurations
Component Name Comment
J7 Leave open for dual supply operation
J1 VIO power input
J2 VCC power input