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Is there any need for time delay for OE

Vinay57187
Prodigy 50 points

Hello,

We are using TXS0104ED in our design. We wanted to know, if there is any need to provide a time delay of say 1us for the the outputs of the translator to be active after power ON.

For instance, VCCA = 1.8V and VCCB=3.3V. Then, at the time of power on, should we include an RC circuit to introduce a time delay (with one end of R tied to 1.8V) before the outputs get enabled for their operation.

Request your kind support at the earliest.

Thanks and Regards,

Vinay

  • 0
    TI__Genius 9085 points

    The device should become operational close to 200ns after power on. However, the 'one-shot' edge acceleration circuitry takes about 1us to charge after being enabled/powered.

     

    I do not understand what you mean by introducing a time delay using an RC circuit. Without further understanding, my concern is that such a circuit would hurt device performance when under operation.

     

     

  • 0 in reply to Hattie
    TI__Genius 9085 points

    It is OK to tie OE directly to VCCA, although there will be the delay before the IOs are fully operational.