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

• CPU Supervisor Functions

   — Power On Reset, Low Voltage Sense

   — Watchdog Timer (SW Selectable: 0.25s, 0.75s, 1.75s, off)

• 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

   — 14-Lead SOIC and 14-Lead TSSOP

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