X1226

® X1226 4K (512 x 8), 2-Wire™ RTC Data Sheet May 8, 2006 FN8098.3 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 www.DataSheet4U.com —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 —8 Ld SOIC and 8 Ld TSSOP Repetitive Alarms Temperature Compensation Pb-Free Plus Anneal Available (RoHS Compliant) BLOCK DIAGRAM OSC Compensation X1 X2 Frequency Divider APPLICATIONS Utility Meters HVAC Equipment Audio/Video Components Set Top Box/Television Modems Network Routers, Hubs, Switches, Bridges Cellular Infrastructure Equipment Fixed Broadband Wireless Equipment Pagers/PDA POS Equipment Test Meters/Fixtures Office Automation (Cop...