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TMUX7213: Meaning of break before make time

Shinichi Inoue
Guru 21131 points
Part Number: TMUX7213

Dear Specialists,

My customer is considering TMUX7213 and has a question.

I would be grateful if you could advise.

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TMUX7213 has a spec of break before make time.

Could you please the meaning of this spec.

BBM is generally used in SPDT, etc., and I think it indicates the time at which the channel is switched after the control signal is input.

https://e2e.ti.com/support/switches-multiplexers-group/switches-multiplexers/f/switches-multiplexers-forum/1055546/faq-what-are-the-break-before-make-bbm-and-make-before-break-mbb-features-in-analog-switches-multiplexers-and-how-are-they-different

The TMUX7213 is SPST, what time is defined after the control signal is input?

Could you please let us know the  Break-Before-Make Delay Measurement Setup

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I appreciate your great help in advance.

Best regards,

Shinichi

  • +1
    Guru 306360 points

    The TMUX7213 has control inputs with opposite polarity. If you connect two such control signals and the corresponding switch outputs together, you have built a SPDT switch.

  • 0 in reply to Clemens Ladisch
    Guru 21131 points

    Hi Clemens,

    Thank you for your reply.

    I understand TMUX7213 can use for SPDT switch.

    In this case,  is it possible to use absolutely break before make switch.

    For example, when different signals are input to S1 and S2 and D1 and D2 are connected, it becomes SPDT, as you mentioned.

    Is there a risk that S1 and S2 will be short-circuited when the same control signal is input to SEL1 and SEL2?

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi

  • +1 in reply to Shinichi Inoue
    Guru 306360 points

    The specified tBBM values guarantee that enabling is slower than disabling, i.e., that S1 and S2 are never shorted together.

  • 0 in reply to Clemens Ladisch
    Guru 21131 points

    Hi Clemens,

    Thank you for your reply.

    TMUX7213 is able to use BBM SPDT by D1 and D2 shorted, same control signal input SEL1 and SEL2.

    At that time S1 and S2 are never shorted together.

    I'll share this information with the customer.

    I appreciate your great help and cooperation.

    Best regards,

    Shinichi