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Product Variant Information section
Product Specification Section
Pricing Section

Stock: 0

On Order: 0
Factory Stock:Factory Stock: 0
Factory Lead Time: 45 Weeks
Minimum Order: 3,000
Multiple Of: 100
Quantity Web Price
100 $0.154
500 $0.128
2,000 $0.123
5,000 $0.12
12,500+ $0.117


Attributes Table
Memory Density 4kb
Memory Organization 512 x 8 / 256 x 16
Supply Voltage-Nom 1.8V to 5.5V
Clock Frequency-Max 2MHz
Write Cycle Time-Max (tWC) 1ms
Features and Applications

The CAT93C66 is a 4-Kb CMOS Serial EEPROM device which is organized as either 256 registers of 16 bits (ORG pin at VCC) 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.

Key Features:

  • High speed operation: 2MHz
  • 1.8V to 5.5V supply voltage range
  • Selectable x8 or x16 memory organization
  • Sequential read
  • Software write protection
  • Power-up inadvertant write protection
  • Low power CMOS technology
  • 1,000,000 Program/erase cycles
  • 100 year data retention
  • Industrial and Extended temperature ranges
  • RoHS-compliant 8-pin PDIP, SOIC, TSSOP and 8-pad TDFN packages


  • Automotive Systems
  • Communications Systems
  • Computer Systems
  • Consumer Systems
  • Industrial Systems