SLLA637 May   2024 THVD4431

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Key Feature Highlights of THVD4431 Over XR34350 and SP339E/B
    1. 2.1 Regulated Output Voltage for RS-232
    2. 2.2 Full Path Diagnostic Loopback
    3. 2.3 Operating Ambient Temperature Range
    4. 2.4 Integrated Switchable Termination Resistor on Both Driver (R1/R2) and Receiver (R3/R4) Bus Pins
    5. 2.5 1.65V to 5.5V Supply for Logic Data and Control Signals
  6. 3Potential Design Changes
    1. 3.1 Pin 9 (VIO)
    2. 3.2 Pin 13 (MODE2)
    3. 3.3 Pin 17 (TERM_TX) and Pin 18 (TERM_RX)
    4. 3.4 Pin 19 (SHDN)
    5. 3.5 Pin 36 (NC)
  7. 4Pinout Mapping
  8. 5Summary
  9. 6References

3.4 Pin 19 (SHDN)

Pin 19 is SHDN(shutdown) for TI’s THVD4431 and is EN (enable) for Maxlinear’s XR34350 and SP339E/B. These pins are identical in functionality – pull Pin 19 to VIO to enable device operation and pull-down to ground to disable device operation. For both devices, asserting this function disables all blocks and the current drawn from the device is just the leakage current.