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SN74S1053 - Clamp diode with Vcc=3.3V

Hirotaka Matsumoto
Guru 27575 points
Other Parts Discussed in Thread: SN74S1053

Hi all

Would you mind if we ask SN74S1053?

Is it possible to use as the clamp diode(pins from D01 to D16) with Vcc=3.3V?(Because the datasheet shows that recommended voltage is from 4.75V to 5.25V)
How much is the break down voltage?

Kind regards,

Hirotaka Matsumoto

  • 0
    Guru 74080 points

    Hi Hirotaka!

    Hirotaka Matsumoto34 said:
    the datasheet shows that recommended voltage is from 4.75V to 5.25V

    The parametrics overview says 4.75V to 5.25V, that's right, but there is no information about the "supply voltage" in the datasheet (or I missed it). Why should a simple diode array have a supply voltage? The only values that are important and also given are the maximum continuous reverse voltage, the maximum forward current with the resulting forward voltage drop and the maximum reverse current (maybe not that important in a bus-termination application). So no idea why the parametrics give a value for the recommended supply voltage - I guess this is a typical application scenario.

    Hirotaka Matsumoto34 said:
    Is it possible to use as the clamp diode(pins from D01 to D16) with Vcc=3.3V?

    I don't see any reason for not doing it.

    Hirotaka Matsumoto34 said:
    How much is the break down voltage?

    The device has a maximum of 7V in reverse-direction.

    Dennis

  • 0 in reply to Dennis Eichmann
    Guru 27575 points

    Dennsi san

    We would like to confirm one point.
    I don't see any reason for not doing it.
    ->It means that you don't have experience to to use as the clamp diode with VCC=3.3V, right?
       If our recgnition is correct, we persuade our customer not to use this way.

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    Guru 74080 points

    Hirotaka Matsumoto34 said:
    It means that you don't have experience to to use as the clamp diode with VCC=3.3V, right?

    I did not use this particular part, right. But I wouldn't have any concerns to use it with 3.3V - the datasheet does not say anything about a minimum supply voltage. And the datasheet overrules everything. And we are talking about a simple diode array. There is no other logic in the device.

    But you can of course wait for an official statement from TI, why not.

    Dennis

  • 0 in reply to Hirotaka Matsumoto
    TI__Guru 57680 points

    Dennis ,

    Thanks for your inputs.

    Hirotaka San,

    what are the D0-D16 connected to ? You don't want to have 5V on Dn pins and operate at 3.3V.

    i do not see the recommended voltage of Vcc listed either though , however all the measurements are done typ at 5V .

  • 0 in reply to ShreyasRao
    Guru 74080 points

    ShreyasRao said:
    You don't want to have 5V on Dn pins and operate at 3.3V.

    Yes, this would be a bad idea, of course. I understood that his system voltage is 3.3V, having 3.3V supply and 3.3V signal level.

    Dennis