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Original question:

SN74128: SN74128 frequency

SN74128: Military grade still with a 50 load? The SN54128 is military grade but with a 75 load

David Herndon
Prodigy 20 points
Part Number: SN74128

I'm looking for a line driver (Not TTL) that is operational from -40C to 85C that can handle a 50 ohm load.  This will need to split my main output into two identical outputs with the same drive strength as each other.

  • 0
    TI__Genius 16725 points

    Hi,

    So you are not necessarily looking for a military grade part? Just a part that operates from -40C to 85C?

    Do you want a mux that splits your output to two outputs? Or do you want a line driver like the 128 function which is a nor gate with 4 channels?

    What voltage are you looking to operate at? We mostly have TTL compatible parts that have the high output drive you require for 50 ohm line driving.

    Example is the SN64BCT25244

    Thanks!

    -Karan

  • 0 in reply to Karan Kotadia
    Prodigy 20 points

    Karan,

    Yes, I'm looking for a component that can operate from -40°C to 85°C.  I need to split a 1PPS signal into two outputs with identical characteristics and both be able to handle a 50 ohm load.  I need to be able to do this on board, so it will need to be a through hole or surface mount component.

    I can supply 5V, 3.3V, or 1.8V - I prefer 3.3V.

    David

  • 0 in reply to David Herndon
    TI__Genius 16725 points

    Hi David,

    I don't think logic devices will be able to meet what you are looking for. That is a very large load that needs to be driven. Especially with a slow and high power signal like what you are looking for. Can you possibly use an analog switch or mux? What is your signal source?

    Thanks!

    -Karan