The X1226 device is a Real Time Clock with clock/calendar, two polled alarms with integrated 512x8 EEPROM, oscillator compensation, and battery backup switch.
Real Time Clock/Calendar with EEPROM
FEATURES
• Real Time Clock/Calendar
—Tracks Time in Hours, Minutes, and Seconds
—Day of the Week, Day, Month, and Year
• 2 Polled Alarms (Non-volatile)
—Settable on the Second, Minute, Hour, Day of the Week, Day, or Month
—Repeat Mode (periodic interrupts)
• Oscillator Compensation On Chip
—Internal Feedback Resistor and Compensation Capacitors
—64 Position Digitally Controlled Trim Capacitor
—6 Digital Frequency Adjustment Settings to ±30ppm
• Battery Switch or Super Cap Input
• 512 x 8 Bits of EEPROM
—64-Byte Page Write Mode
—8 Modes of Block Lock™ Protection
—Single Byte Write Capability
• High Reliability
—Data Retention: 100 Years
—Endurance: 100,000 Cycles Per Byte
• 2-Wire™ Interface Interoperable with I2C
—400kHz Data Transfer Rate
• Frequency Output (SW Selectable: Off, 1Hz, 4096Hz or 32.768kHz)
