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SN74AVC32T245: What is the max. data rate supported while translating 1.8V signals to 2.5V?

Part Number: SN74AVC32T245

Hi,

I want to level shift the 1.8V signals from the controller to 2.5V for DPHY. This requires high data rates.

So, What is the max. data rate supported while translating 1.8V signals to 2.5V using SN74AVC32T245?

Regards,

Shanu V

  • Hi Shanu,

    Unfortunately, this isn't the chip that you will want to do the job. The MIPI D-PHYs typically in use are LVDS drivers while this IC has single ended CMOS inputs with a direction control pin. If you do somehow have one that isn't LVDS, the max bit rate for the levels you want is going to be approximately 380Mbps.

    What speeds are you talking about when you say "high data rates"? To me this probably means the higher end of the MIPI D-PHY spec, probably around one or more 1 - 2.5Gbps. If you tell me the speed I can certainly lend a hand in trying to find another part that will suit your needs. A good place to start is with searching for a LVDS repeater or translator.

    Nick
  • Hi Nicholas,

    We are doing SoC development. So, we plan to use a physical DPHY chip onboard for validation of the IP.
    The interface to the DPHY are single ended 32 bit TX and 32bit RX and many other control signals.

    These are parallel lines and the data rate won't be in Gbps. I expect around 400Mbps.

    As the DPHY operates at 2.5V , all these have to be level shifted from 1.8V to 2.5V.
    So, is there any level shifter which supports the above speed for 1.8V to 2.5V translation?
    If not, then what is the maximum speed supported by SN74AVC32T245 for 1.8V to 2.5V translation?

    Regards,
    Shanu V

  • Hey Shanu,

    The parts capability extends out to 380Mbps. 

    Unfortunately, I have not been able to find a part that will extend to the speed you are looking for yet. I will continue down a couple of other paths to see if I can find you an alternative option.

    Nick