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AM26LV32E: failsafe output logic

user1238011
Prodigy 80 points
Part Number: AM26LV32E

Tool/software:

Hi team,
This is a failsafe question.

If the input signal is open, the failsafe causes the output to be HIGH, but I would like this output to be LOW.
I would like to operate with the specifications of this IC except when it is open.
There is only one input connection device.
This content is a request for a special behavior by the customer.

Q1. Is it possible to put a pull-up on the N terminal and a pull-down on the P terminal for input?
Q2. Is there a failsafe  IC that goes LOW when the input is open?

Regards,
Ken

  • +1
    Guru 303080 points

    1. Yes, you can add external fail-safe resistors. Please note that the AM26LV32E's internal fail-safe does not work when a termination resistor is present, so you need them anyway.

    2. No

  • +1
    TI__Guru 64910 points

    Hi Ken,

    The AM26LV32E doesn't have an internal fail safe feature (Vth+ needs to be below GND for any receiver to support internal fail safe).

    user1238011 said:
    Q1. Is it possible to put a pull-up on the N terminal and a pull-down on the P terminal for input?

    Yes, You can set up an external fail safe by putting the pull up resistor on the inverting node (B) and the non inverting node (A) has a pull down resistor to GND. 

    user1238011 said:
    Q2. Is there a failsafe  IC that goes LOW when the input is open?

    As Clemen's stated, no we don't have a device that automatically outputs a low during opens.

    -Bobby

  • 0 in reply to Clemens Ladisch
    Prodigy 80 points

    Thank you for your reply.