The CAT93C66 is a 4-kb CMOS Serial EEPROM device which is organized as either 256 registers of 16 bits (ORG pin at V
) or 512 registers of 8 bits (ORG pin at GND). Each register can be written (or read) serially by using the DI (or DO) pin. The CAT93C66 features sequential read and self-timed internal write with auto-clear. On-chip Power-On Reset circuitry protects the internal logic against powering up in the wrong state.

• High Speed Operation: 2 MHz
• Low Power CMOS Technology
• 1.8 V to 5.5 V Supply Voltage Range
• Selectable x8 or x16 Memory Organization
• Sequential Read
• Software Write Protection
• Power-up Inadvertent Write Protection
• 1,000,000 Program/Erase Cycles
• 100 Year Data Retention
• Industrial and Extended Temperature Ranges
• 8-pin PDIP, SOIC, TSSOP and 8-pad TDFN Packages
• These Devices are Pb-Free, Halogen Free/BFR Free, and RoHS Compliant