DESCRIPTION

The X1226 device is a Real Time Clock with clock/calendar, two polled alarms with integrated 512x8 EEPROM, oscillator compensation, and battery backup switch.

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

—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)

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 (Copiers, Fax)

? Home Appliances

? Computer Products

? Other Industrial/Medical/Automotive