Datasheet Summary
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DS1689/DS1693
3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control
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Features
Incorporates industry standard DS1287 PC clock plus enhanced Features
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- +3- or +5V operation
- 64-bit silicon serial number
- 64-bit customer specific ROM or additional serial number available
- Power control circuitry supports system power-on from date/time alarm or key closure
- Automatic battery backup and write protection to external SRAM
- Crystal select bit allows RTC to operate with 6 pF or 12.5 pF crystal
- 114 bytes user NV RAM
- Auxiliary battery input
- RAM clear input
- Century register
- 32 kHz output for power management
- 32-bit VCC powered elapsed time...