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