DESCRIPTION
The CAT25CXXX is a single chip solution to three popular functions of EEPROM Memory, precision reset controller and watchdog timer. The EEPROM Memory is a 2K/4K/8K/16K/32K-Bit SPI Serial CMOS E2PROM internally organized as 256x8/512x8/1024x8/2048x8/4096x8 bits. Catalyst’s advanced CMOS Technology substantially reduces device power requirements. The 2K/4K devices feature a 16-byte page write buffer. The 8K/16K/32K devices feature a 32-byte page write buffer.

FEATURES
■ 10 MHz SPI Compatible
■ 1.8 to 6.0 Volt Operation
■ Hardware and Software Protection
■ Zero Standby Current
■ Low Power CMOS Technology
■ SPI Modes (0,0 &1,1)
■ Commercial, Industrial and Automotive Temperature Ranges
■ Active High or Low Reset Outputs
    – Precision Power Supply Voltage Monitoring
    – 5V, 3.3V, 3V and 1.8V Options
■ Watchdog Timer on CS
■ 1,000,000 Program/Erase Cycles
■ 100 Year Data Retention
■ Self-Timed Write Cycle
■ 8-Pin DIP/SOIC, 16-Pin SOIC and 14-Pin TSSOP
■ Page Write Buffer
■ Block Write Protection
    – Protect 1/4, 1/2 or all of E2PROM Array
■ Programmable Watchdog Timer
■ Built-in inadvertent Write Protection
    – VCC Lock Out