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TRSF3221E: Need an Alternate with Flow control pin transceiver.

Desireddy Teja Reddy
Intellectual 610 points
Part Number: TRSF3221E
Other Parts Discussed in Thread: TRSF3223E

Tool/software:

Hi Team,

We are using TRSF3221EIRGTR - RS232 Transceiver in our designs. we are using UART to RS-232 which involves TX and Rx in this IC. 
As we need to deploy flow controls for UART which involves CTS and RTS (Clear to send and request to send).

This TRSF3221EIRGTR RS 232 Transceiver is not supporting Flow controls. Please suggest an RS-232 Transceiver with Flow control pins also.

The pins are as follows:
DOUT
ROUT
RTS
CTS.

Note: Please suggest the XCVR with 1MBPS if possible.

  • 0
    TI__Expert 5096 points

    Hi Desireddy,

    I recommend the TRSF3223E:

    • Key difference: 2 transmitters and 2 receivers for DOUT/ROUT/RTS/CTS
    • Same 3.3-5V supply
    • 1Mbps
    • Auto-powerdown

    Note that RS-232 transceivers do not always call out RTS and CTS. However, the additional transmitter and receiver can be used for these functions. 

    Let me know if you have any more questions!

    -Ethan 

  • 0 in reply to Ethan Sempsrott
    Intellectual 610 points

    Hi Ethan,

    Thanks for your reply.

    As this  TRSF3223E hasre 2 transmitter and 2 receivers, We can use 1 transmitter and 1 receiver for TX and RX function and the remaining 1 transmitter and 1 Receiver we can use for RTS and CTS.

    Please correct me if I was wrong.

    Check the above mentioned image for the interface with UART (With flow controls) with TRSF3223E. 

    Note that RS-232 transceivers do not always call out RTS and CTS. --> Ans to this, we have a requirement in which RTS and CTS will come into place while sending data every time.

    Please check the approach I had shared and share your feedback.

    Thanks and Regards
    Teja.

  • 0 in reply to Desireddy Teja Reddy
    TI__Expert 5096 points

    Hi Teja,

    Desireddy Teja Reddy said:
    As this  TRSF3223E hasre 2 transmitter and 2 receivers, We can use 1 transmitter and 1 receiver for TX and RX function and the remaining 1 transmitter and 1 Receiver we can use for RTS and CTS.

    This statement and image are both correct. 

    Desireddy Teja Reddy said:
    Note that RS-232 transceivers do not always call out RTS and CTS. --> Ans to this, we have a requirement in which RTS and CTS will come into place while sending data every time.

    Let me clarify my original statement: RS-232 transceivers and their datasheets do not explicitly label the transmit and receive pins as RTS and CTS. Your approach here will work well. 

    Best,

    Ethan

  • 0 in reply to Ethan Sempsrott
    Intellectual 610 points

    Hi Ethan,

    Thanks for the valuable inputs.