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 32,768 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: 25AA256, 25LC256
Additional Features
32,768 x 8-bit (256 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: 7mA (Max) at 10 MHz
Standby current: 3μA (Max) at 1.8V, 5μA (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
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 32,768 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: 25AA256, 25LC256
Additional Features
- 32,768 x 8-bit (256 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: 7mA (Max) at 10 MHz
- Standby current: 3μA (Max) at 1.8V, 5μA (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
