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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