Catalog
256Kb SPI Serial EEPROM
| Part | Memory Size | Memory Type | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Supply [Min] | Voltage - Supply [Max] | Package / Case | Package / Case | Package / Case | Write Cycle Time - Word, Page | Technology | Memory Format | Supplier Device Package | Memory Organization | Clock Frequency | Memory Interface | Supplier Device Package [x] | Supplier Device Package [y] | Package / Case [y] | Package / Case [x] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Microchip Technology | 32 KB | Non-Volatile | Through Hole | 85 °C | -40 °C | 4.5 V | 5.5 V | 0.3 in | 8-DIP | 7.62 mm | 5 ms | EEPROM | EEPROM | 8-PDIP | 32K x 8 | 3 MHz | SPI | ||||
 Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-VFBGA DSBGA | 5 ms | EEPROM | EEPROM | 8-dBGA | 32K x 8 | 20 MHz | SPI | 2.35 | 3.73 | ||||
 Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-SOIC | 5 ms | EEPROM | EEPROM | 8-SOIC | 32K x 8 | 20 MHz | SPI | 5.3 mm | 0.209 " | ||||
 Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-SOIC | 5 ms | EEPROM | EEPROM | 8-SOIC | 32K x 8 | 20 MHz | SPI | 3.9 mm | 0.154 in | ||||
Microchip Technology | 32 KB | Non-Volatile | Through Hole | 85 °C | -40 °C | 1.8 V | 5.5 V | 0.3 in | 8-DIP | 7.62 mm | 5 ms | EEPROM | EEPROM | 8-PDIP | 32K x 8 | 20 MHz | SPI | ||||
Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-SOIC | 5 ms | EEPROM | EEPROM | 8-SOIC | 32K x 8 | 20 MHz | SPI | 5.3 mm | 0.209 " | ||||
Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 3.6 V | 8-SOIC | 10 ms | EEPROM | EEPROM | 8-SOIC | 32K x 8 | 2.1 MHz | SPI | 5.3 mm | 0.209 " | ||||
Microchip Technology | 32 KB | Non-Volatile | Through Hole | 70 °C | 0 °C | 4.5 V | 5.5 V | 0.3 in | 8-DIP | 7.62 mm | 5 ms | EEPROM | EEPROM | 8-PDIP | 32K x 8 | 3 MHz | SPI | ||||
 Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-UFDFN Exposed Pad | 5 ms | EEPROM | EEPROM | 8-UDFN (2x3) | 32K x 8 | 20 MHz | SPI | ||||||
Microchip Technology | 32 KB | Non-Volatile | Surface Mount | 85 °C | -40 °C | 1.8 V | 5.5 V | 8-SOIC | 5 ms | EEPROM | EEPROM | 8-SOIC | 32K x 8 | 20 MHz | SPI | 3.9 mm | 0.154 in |
Key Features
• * 32,768 x 8-bit (256 Kbit)
• * Supports SPI modes 0 and 3
• * Up to 20 MHz clock frequency
• * Self-Timed Erase and Write Cycles (5 ms max.)
• * 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
• * 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
Description
AI
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.