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TS3L500AE: Test without EVM

Kazuki Itoh
Genius 9645 points
Part Number: TS3L500AE

Hi team,

I'd like to check if TS3L500AE works.

As TI doesn't provide EVM for this device, I'd like to use pitch conversion break board.

The problem here is I don't have break board which fits WQFN56P.

So, I'll use SOP break board.

In this case, 21-28#, 49-56# pins will be NC.

Do you think TS3L500AE should work under this condition?

I recognize LED selection doesn't work.

The key concern here is if TS3L500AE works under some of VCC/GND pins are open.

 

Best Regards,

Itoh

  • 0
    TI__Mastermind 46427 points

    Hi Itoh,

    While this shouldn't cause damage to the board, there is no guarantee it will work as expected with GND and VCC pins floating. 

    I can't seem to find what breakout/adapter board you are using, can you share a part number, there may be a way to modify the board to make sure that no VCC or GND pins are floating.

    The other concern I have is since this is a high speed switch, even though you aren't needing to test the LED switches, leaving them open can cause some SI issues at high speeds, and it is typically recommended to terminate unused Mux channels / ports with a 50 Ohm Resistor to Ground.

    If you could send the adapter board you are working with, I may be able to see an quick modification that may allow for testing of this part without having to create a custom board.

    Best,

    Parker Dodson

  • 0 in reply to Parker Dodson
    TI__Genius 9645 points

    Hi Parker-san,

    https://jp.rs-online.com/web/p/extender-boards-adapters/4018112/

    This is the break out board I'm looking at.

    Modifying this board to measure TS3L500AE looks challenging.

    Is it better to fabricate PCB for TS3L500AE testing?

    Or, do you have any other adapter board recommendation?

    Regards,

    Itoh

  • 0 in reply to Kazuki Itoh
    TI__Mastermind 46427 points

    Hi Itoh,

    I am sorry about the delay.

    But yes, I don't think that modifying the board will be a good use of time, and it will probably be easier fabbing a test card for the part.

    Best,

    Parker Dodson