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TRS3227: What is the difference between TR3227 and SN74AVC4T245RGYR

Daniel Cheng1
Mastermind 6225 points
Part Number: TRS3227
Other Parts Discussed in Thread: SN74AVC4T245

Hi Expert,

TDA3EVM design use SN74AVC4T245RGYR for uart.

Could I use TRS3227 for uart on TDA3 customer board?

What is the difference between TR3227  and SN74AVC4T245RGYR?

Thanks

Daniel

  • 0
    TI__Guru 61760 points

    Hi Daniel,

    "What is the difference between TR3227  and SN74AVC4T245RGYR?"

    The TRS3227 is an RS232 transceiver and the SN74AVC4T245 is a direction controllable level shifter.

    You typically wouldn't use a level translator to drive a cable whereas an RS-232 transceiver is designed to drive cables. I would assume the SN device would mainly be used for onboard communication since it likely can't drive the current required for cabling.

    "Could I use TRS3227 for uart on TDA3 customer board?"

    It depends what speeds and signals you need to send. Based on figure 4-1 of the TDA3EVM user's guide, it shows 4 UART signals. The CTS/RTS/TX/RX. The TRS3227 looks to be a single channel transceiver so it would only take care of TX/RX but you may need to get another or upgrade to a larger transceiver if you plan to use the CTS/RTS.

    Let me know if you have any follow up questions.

    -Bobby