DESCRIPTION
The CAT93CXXXX is a single chip solution to three popular functions of EEPROM memory, precision reset controller and watchdog timer. The serial EEPROM memory of the 93CXXXX can be configured either by 16- bits or by 8-bits. Each register can be written (or read) by using the DI (or DO pin).

FEATURES
■ Watchdog Timer
■ Programmable Reset Threshold
■ Built-in Inadvertent Write Protection
    —VCC Lock Out
■ High Speed Operation: 3MHz
■ Low Power CMOS Technology
■ x 16 or x 8 Selectable Serial Memory
■ Self-Timed Write Cycle with Auto-Clear
■ Sequential Read
■ Fast Nonvolatile Write Cycle: 3ms Max
■ Active High or Low Reset Outputs
    —Precision Power Supply Voltage Monitoring
    —5V, 3.3V and 3V options
■ Hardware and Software Write Protection
■ Power-Up Inadvertant Write Protection
■ 1,000,000 Program/Erase Cycles
■ 100 Year Data Retention
■ Commercial, Industrial, and Automotive Temperature Ranges
■ 2.7-6.0 Volt Operation
■ 16 Byte Page Mode