产品概览
The Microchip AT25256B-SSHL-B is a 256Kb SPI Serial EEPROM organized as 32K x 8, housed in an 8-pin SOIC (150 mil) package. Operating from 1.8V to 5.5V with a 20MHz maximum clock frequency, it supports SPI modes 0 and 3. The device features block write protection (1/4, 1/2, or entire array), hardware write protect and HOLD pins, self-timed write cycles (5ms max), 1 million erase/write cycle endurance, and 100-year data retention. It is available in both industrial (-40°C to +85°C) and automotive grade (-40°C to +125°C) versions.
主要规格
| Density | 256 Kbit (32K x 8) |
| Interface | SPI (modes 0 and 3) |
| Max Clock Frequency | 20 MHz |
| Operating Voltage | 1.8V to 5.5V |
| Page Size | 64 bytes |
| Write Cycle Time | 5 ms max (self-timed) |
| Endurance | 1,000,000 write cycles |
| Data Retention | 100 years |
| 工作温度 | -40°C to +85°C (industrial) |
| 包装 | 8-SOIC (150 mil, 3.90mm width) |
特点
- 256Kb SPI serial EEPROM with 32K x 8 organization
- Supports SPI modes 0 and 3
- Up to 20MHz clock frequency
- Block write protection: 1/4, 1/2, or entire array
- Hardware write protect pin and write disable instructions
- HOLD pin for suspending serial communication
- Self-timed write cycle (5ms max)
- More than 1 million erase/write cycles
- 100-year data retention
- Available in industrial and AEC-Q100 automotive grades
应用
- Industrial and commercial systems
- Automotive electronics (AEC-Q100 qualified)
- Consumer electronics configuration storage
- Medical device calibration and data logging
- Embedded system parameter retention
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