X1228
Overview
- 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
- CPU Supervisor Functions - Power-On Reset, Low Voltage Sense - Watchdog Timer (SW Selectable: 0.25s, 0.75s, 1.75s, off)
- 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)
- Low Power CMOS - 1.25µA Operating Current (Typical)
