EEPROM, serial, 256Kb (32kx8), SPI, 1.8 - 5.5 V, SO-8

256 Kb SPI Serial EEPROM

Description:
The Microchip AT25256B is a 256 Kb Serial EEPROM utilizing the industry standard Serial Peripheral Interface (SPI) compatible serial bus. The device is organized as one block of 32768 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.

Features:
Density : 256 Kbit
Op. Volt Range (V) : 1.8 to 5.5
Max. Clock Freq.: 20 MHz
Page Size (bytes): 64
Write Protect: Quarter, Half, Whole Array
Temp Range (°C): -40°C to +85°C
Endurance: 1,000,000
Bus Modes: SPI

- 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: 7mA (Max) at 5 MHz
- Write current: 7 mA (Max) at 5 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