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Silicon Serial Number ic

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Has someone a good suggestion of a silicon serial number ic with the least bits configurable?

I need for my design a unique serial number but one of the least bits should be set by a dip-switches to indicate their physical location.

 

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    Sometimes you take component features for matter of course but after a while you realize that specific feature of ic is not existing.

    I forward this to our project group and they consider that family identification was more important than unit-unique-ID.

     

    So at this time, we skip the unit-unique-id and only use a dip-switch family settable ID and for that task I probably use a I2C I/O expander IC connected to the dip-switch.

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    Sometimes you take component features for matter of course but after a while you realize that specific feature of ic is not existing.

    I forward this to our project group and they consider that family identification was more important than unit-unique-ID.

     

    So at this time, we skip the unit-unique-id and only use a dip-switch family settable ID and for that task I probably use a I2C I/O expander IC connected to the dip-switch.

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