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Using SN74AVC32T245 for the LCD

Jonathan Bouchard
Prodigy 160 points

Hi,

I am currently designing a board which requires to have an LCD (320x240, 3.5po). I have noticed that for the EVM module, TI used a transceiver buffer between the LCD and the chip. According to the datasheets, the driver strength seems to be enough, but I would appreciate knowing the exact reasons why it has been put on the board. The LCD cape of the beagle-bone seems to use the sames buffer without giving any reason. I have already considered ESD protection, level shift or logic level shifting.

I would like to be able to remove it if possible to reduce the cost.

LCD models : TM035KDH03-36 from tianma

  • 0
    TI__Intellectual 2150 points

    You should be okay without the transceiver (although you will want to verify through proper PCB layout and simulation that your board construction does not introduce issues).

    The main reasons the transceiver buffer was placed on the EVM's was due to the multi-board architecture (going across connectors) as well as to allow some possibility of testing with a different voltage value on the AM335x LCD I/O bank while using the same LCD.