Real Time Clock/Calendar/CPU Supervisor 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

• 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 Ld SOIC and 14 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