THVD4411: THVD4411RGER

Hi Chaithra,

Here is a link where you can view these two devices with a comparison chart of the differences: Compare products (ti.com)

As you have noted, the main difference is that the THVD4411 offers 1T1R RS232 mode, where the THVD4421 offers 2T2R RS232 mode. 

However, the "half" and "full" duplex configuration terminologies are only related to RS485. The best way to understand this would be compare the THVD4411 datasheet, these three figures: Figure 7-2. (RS-232 Mode), Figure 7-3. (RS-485 Half Duplex Mode) and Figure 7-4. (RS-485 Full Duplex Mode). 

THVD4411 Multiprotocol (RS-232, RS-422, RS485) Transceiver with Integrated 120Ω Switchable Termination Resistor and IEC-ESD Protection datasheet (Rev. A)

Similarly, compare Figure 7-3. (RS-232 2T2R Mode), Figure 7-4. (RS-485 Half Duplex Mode) and Figure 7-5. (RS-485 Full Duplex Mode) in the THVD4421 datasheet: 

THVD4421 Multiprotocol (RS-232, RS-422, RS485) Transceiver with Integrated 120Ω Switchable Termination Resistor and IEC-ESD protection datasheet

Hopefully this helps to clarify. Please reach out with any other questions.

Sincerely, Amy

Hi Chaithra,

Feel free to look over our EVM design for the THVD4411: THVD4411 Evaluation Module User's Guide

We implement pullup / pulldown resistors options. You can always leave a footprint and DNI the component if you want flexibility your design.

Hope this helps. -Amy