X1228 Datasheet | Intersil

® D FO NDE E M S OM RE C SI G N NOT NEW DE 2028 I SL 1 Data Sheet SEE R 4K (512 x 8), 2-Wire™ RTC May 18, 2006 FN8100.4 Real Time Clock/Calendar/CPU Supervisor 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 pensation on Chip - Internal Feedback Resistor and pensation 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...