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frequency precision

Discussion in 'Beginner Electronics' started by [email protected], Jul 5, 2007.

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  1. Guest

    Have a kind of difficult question.

    im looking for RTC chips for a micro controller project, i need an
    accurat way of keeping time as well as interrupt alarms and can use
    I2C or SPI for the application, my problem is understanding the
    precision of these chips from there technical specification.

    For example the sheet
    Page 4, frequency characteristics shows 5 +- 23 * 10^-6. Just exaclty
    how does one interpret this?

    Any help is much appreciated.

    Thanks for your time

  2. Guest

    Thanks very much, got it now :)
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