DS12885 Datasheet, PDF (4/4 Pages) Dallas Semiconductor – Real-Time Clock

DS12885/DS12885Q/DS12885T
CLOCK ACCURACY
The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of the match
between the capacitive load of the oscillator circuit and the capacitive load for which the crystal was
trimmed. Additional error is added by crystal freque ncy drift caused by temperature shifts. External
circuit noise coupled into the oscillator circuit can result in the clock running fast. Refer to Application
Note 58 “Crystal Considerations with Dallas Real-Time Clocks” for detailed information.
RECOMMENDED LAYOUT FOR CRYSTAL
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