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SN74AVC4T245: backfeed protection when off

Alan Hoehn
Intellectual 570 points

Part Number: SN74AVC4T245

I will be using the SN74AVC4T245 for level shifting from a SMART cable connector.  Does this part provide backfeed protection if the smart cable (FTDI # TTL 232R3V3) is connected but the board powering the SN74AVC4T245 is off?

  • 0
    TI__Genius 16825 points

    Hi Alan,

    I believe the feature you are talking about is Ioff.

    Ioff will prevent backflow currentby disabling I/O output circuits when device is in partial-power-down mode. If either of your Vcc is at 0V, then the I/O's will go to Hi-Z.

    This device does have Ioff.

    Thanks!

    -Karan