The Microchip AT24CS64 is a 64 Kb Serial EEPROM utilizing an I²C (2-wire) serial interface. The device is organized as one block of 8K x 8 and is optimized for use in consumer and industrial applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options.

The AT24CS64 features a 128-bit serial number that is programmed and permanently write protected during the Microchip manufacturing process. This unique identifier is separate from the main 64Kb memory array and eliminates the time consuming step of performing and ensuring serialization of a product on a manufacturing line. The 128 bit serial number is guaranteed unique across the entire CS series of Serial EEPROM products.

• 8K x 8 (64 Kbit)
• 2-Wire Serial Interface, I²C Compatible
  • 400 kHz (1.7V) and 1 MHz (>2.5V) clock compatibility
• Self-Timed Erase and Write Cycles (5 ms max.)
• Low Power Consumption
  • Read current 0.4 mA (Typ), 1.0 mA (Max)
  • Write current 2 mA (Typ), 3 mA (Max)
  • Standby current 6 uA (Max)
• Hardware Write-Protect Pin
• More than 1 million erase/write cycles
• Data retention > 100 years
• Factory Programming Available
• Available in 8-lead JEDEC SOIC, 8-lead TSSOP, and 8-pad UDFN