The Microchip AT25128B is a 128 Kb Serial EEPROM utilizing the industry standard Serial Peripheral Interface (SPI) compatible serial bus. The device is organized as one block of 16,384 x 8-bit and is optimized for use in consumer electronics, industrial, medical, and automotive applications where reliable and dependable nonvolatile memory storage is essential. Software write protection allows the user to protect ¼, ½, or the entire memory array. A hardware write protect pin is also provided, which additionally protects against inadvertent writes to the status register. The EEPROM is available in a variety of space-saving packaging options.

For product comparison, please consider: 25AA128, 25LC128

• 16,384 x 8-bit (128 Kbit)
• Serial Peripheral Interface (SPI) Compatible
  • Supports SPI modes 0 and 3
  • Up to 20 MHz clock frequency
• Self-Timed Erase and Write Cycles (5 ms max.)
• Low Power Consumption
  • Read current: 7 mA (Max) at 10 MHz
  • Write current: 7 mA (Max) at 10 MHz
  • Standby current: 3 μA (Max) at 1.8V, 5 μA (Max) at 5 V
• Block Write Protection: Protect 1/4, 1/2 or Entire Array
• More than 1 million erase/write cycles
• Data retention 100 years
• Temperature Ranges Available
• Automotive Grade 1: -40°C to 125°C
• Automotive Grade 2: -40°C to 105°C
• Automotive Grade 3 / Industrial: -40°C to 85°C
• Automotive AECQ-100 Qualified¹
• Factory Programming Available
• Available in standard packages including 8-lead SOIC, and advanced packages including 8-lead TSSOP, 8-lead 2x3 DFN, and 8-ball VFBGA

¹Consult Automotive datasheet for device specification and ordering part number