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AM26C31:AM26C31 出力トランジスタ　耐圧

yoneyama
Prodigy 10 points
Part Number: AM26C31
Other Parts Discussed in Thread: TPL7407LA

AM26C31について質問があります。

 

ラインドライバ出力トランジスタの耐電圧を教えてください。

同じGNDの制御ロジック24V回路を使用したいのですが。

ラインドライバ出力がオープンコレクタとして使用できることを教えてください。

 

お返事をお待ちしております。

  • 0
    Guru 269890 points

    The absolute maximum ratings do not allow 24 V. And there is only a single enable control signal for all four drivers, so it is probably not possible to get proper open-drain signals.

    Why do you want to use the AM26C31 for this? Do you also need differential outputs? A plain driver like the TPL7407LA would work better for open-drain outputs.

  • +1
    TI__Mastermind 46387 points

    Hi yoneyama,

    Clemens is correct - this device cannot stand 24V on its bus pins (+/-14V is differential voltage max). Also due to device architecture its not really possible to mimic an open-drain system (from an internal architecture they are push-pull -not open drain; you'd need to use the enable + bus biasing resistors to mimic an open drain - but as Clemens alluded to there is only 1 enable for 4 different channels - so a true "open drain" style of operation is not possible)

    Since this is single ended it seems as well I don't think RS-422 are the best type of devices - using a standard Driver like Clemens suggested would be a better place to start as I don't think the AM device will be a good fit for this application.

    Best,

    Parker Dodson