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