X1228

® D FO NDE E M S OM RE C SI G N NOT NEW DE 2028 I SL 1 Data Sheet SEE R X1228 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 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 www.DataSheet4U.com — 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) Small Package Options — 14 Ld SOIC and 14 Ld TSSOP Repetitive Alarms Temperature Compensation Pb-Free Plus Anneal Available (RoHS Compliant) APPLICATIONS Utility Meters HVAC Equipment Audio/Video Components Set Top Box/Television Modems Network Router...