Real Time Clock/Calendar/Alarm with EEPROM
Description
The X1243 is a Real Time Clock with clock/calendar circuits and two alarms. The dual port clock and alarm registers allow the clock to operate, without loss of accuracy, even during read and write operations.
Features
• 2 alarms—interrupt output
- Settable on the second, 10s of seconds, minute, 10s of minutes, hour, day, month, or day of the week
- Repeat alarm for time base generation
• 2-wire interface interoperable with I2C
- 400kHz data transfer rate
• Secondary power supply input with internal switch-over circuitry
• 2Kbytes of EEPROM
- 64-byte page write mode
- 3-bit Block Lock™ protection
• Low power CMOS
- <1µA operating current
- <3mA active current during program
- <400µA active current during data read
• Single byte write capability
• Typical nonvolatile write cycle time: 5ms
• High reliability
• Small package options
- 8-lead SOIC package, 8-lead TSSOP package
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