CAT24C643

Advanced CAT24C323(32K), CAT24C643 (64K) Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer FEATURES s Watchdog Timer Input (WDI) s Programmable Reset Threshold s s s s s s Active High or Low Reset Outputs 400 KHz I2C Bus Compatible 2.7 to 6 Volt Operation Low Power CMOS Technology 32 - Byte Page Write Buffer Built-in inadvertent write protection — VCC Lock Out s s s s — Precision Power Supply Voltage Monitoring — 5V, 3.3V and 3V options 1,000,000 Program/Erase Cycles 100 Year Data Retention 8-Pin DIP or 8-Pin SOIC Commercial, Industrial and Automotive Temperature Ranges DESCRIPTION The CAT24C323/643 is a single chip solution to three popular functions of EEPROM memory, precision reset controller and watchdog timer. The 24C323(32K) and 24C643 (64K) feature a I2C Serial CMOS EEPROM Catalyst advanced CMOS technology substantially reduces device power requirements. The 24C323/643 features a 32-byte page and is available in 8-pin DIP or 8-pin SOIC packages. The reset function of the 24C323/643 protects the system during brown out and power up/down conditions. During system failure the watchdog timer feature protects the microcontroller with a reset signal. 24C323 features active low reset on pin 2 and active high reset on pin 7. 24C323/643 features watchdog timer on the WDI input pin (pin 1). PIN CONFIGURATION 24C323/643* WDI RESET WP VSS VCC RESET SCL SDA BLOCK DIAGRAM EXTERNAL LOAD DOUT ACK VCC VSS WORD ADDRESS BUFFERS COLUMN...