SLLU370 june   2023 THVD4431

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  8. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Setup
    3. 2.3 Component Information
  9. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5References

Device Information

THVD4431 is a highly integrated and robust multiprotocol transceiver supporting RS-232, RS-422 and RS-485 physical layers. The device has three transmitters and five receivers to enable 3T5R RS-232 port. Device also integrates one transmitter and one receiver to enable half and full duplex RS-485 port. MODE selection pins enable shared bus and logic pins for the protocols to share a common single connector. Integrated termination for RS-485 bus pins and for RS-232 receiver inputs verify no external components are needed to realize a fully functional communication port. These devices have a slew rate select feature that enables the devices to be used at two maximum speeds based on the SLR pin setting.

These devices feature integrated Level 4 IEC ESD protection, eliminating the need for external system level protection components. Diagnostic loopback mode for both RS-232 and RS-485 is provided to check for logic to bus and bus to logic path functional integrity and check for cable and connector shorts. In addition, the RS-485 receiver fail-safe feature drives logic high on received logic output when the bus inputs are open or shorted together or when the bus is idle. Shutdown mode consumes ultra-low current (10 uA typical), which is an excellent choice for power-sensitive applications. The device needs 3 to 5.5 V supply that powers the charge pump for RS-232 and the drivers/receivers for both RS-232 and RS-485. A separate logic supply VIO (1.65 V to 5.5 V) enables interface with low level microcontrollers.

For more specific device information please see data sheet (SLLSFS1).