DESCRIPTION

The X1205 device is a Real Time Clock with clock/calendar, two polled alarms, oscillator compensation, and battery backup switch.

The oscillator uses an external, low-cost 32.768kHz crystal. All compensation and trim components are integrated on the chip. This eliminates several external discrete components and a trim capacitor, saving board area and component cost.

The Real-Time Clock keeps track of time with separate registers for Hours, Minutes, and Seconds. The Calendar has separate registers for Date, Month, Year and Day-of-week. The calendar is correct through 2099, with automatic leap year correction.

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

? 2-Wire? Interface interoperable with I2C*

—400kHz data transfer rate

? Low Power CMOS

—1.25μA Operating Current (Typical)

? Small Package Options

—8-Lead SOIC and 8-Lead 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