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Ask an Expert Forum Reference Texas TXB0101 voltage translator
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  • logic
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Reference Texas TXB0101 voltage translator

phil.s
phil.s over 9 years ago

Hello,

I would appreciate some advice on this component.

I have a battery powered device (a clock) that runs on a 1.5-V battery. I want to use this radio controlled clock to transmit a synchronising pulse to other devices by using its alarm output.

It has an alarm output that is 1.5-V relative to 0V when the alarm is not operating, and is 0-V when the alarm is operating

I need to interface it with a 5-V CMOS IC (Schmitt 74HC14) and a 5-V MCU system.

1.5-V is less than the minimum reliable voltage for voltage high logic, so I was proposing to translate the 1.5-V signal to 5-V - speed of conversion is not an issue.

The TXB0101 operates at 5-V on one port and down to 1.2-V on the other port.

I have used FETs for the same purpose, but would like to try this IC.

Do you think it would be suitable?

Thank you

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  • michaelkellett
    0 michaelkellett over 9 years ago

    Why should it not be suitable ?

     

    If you don't mind the surface mount only package it's fine. A single NPN transistor and a pull up resistor would be cheaper and more readily obtainable in any package you like.

    So, as ever, it depends on:

    will you make one or one million

    do you need extreme small size, low power, low parts count

    can you cope with surface mount

    is the esd protection useful

     

    and so on.

     

    MK

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  • Robert Peter Oakes
    0 Robert Peter Oakes over 9 years ago in reply to michaelkellett

    I agree with Michael, Keep it simple and reliable, there will be plenty of opertunities to experement with other projects and no need to over engineer on this one

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