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)
