AT25256B 256Kbit,SPI接口串行EEPROM存储器

256Kbit, SPI Bus Serial EEPROM, High speed, supports Mode 0 and 3.

• 128KBEEPROM存储器：AT25128B
• 256KBEEPROM存储器：AT25256B

The AT25128B/256B provides 131,072/262,144 bits of serial electrically-erasable programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The devices are available in space saving 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-ball dBGA2 and 8-lead SAP packages. In addition, the entire family is available in 1.8V (1.8V to 5.5V).

The AT25128B/256B is enabled through the Chip Select pin () and accessed via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). All programming cycles are completely self-timed, and no separate Erase cycle is required before Write.

AT25256B 特性

• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• Data Sheet Describes Mode 0 Operation
• Low-voltage and Standard-voltage Operation
  – 1.8 (VCC = 1.8V to 5.5V)
• 20 MHz Clock Rate (5V)
• 64-byte Page Mode and Byte Write Operation
• Block Write Protection
  – Protect 1/4, 1/2, or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for Both Hardware and Software Data Protection
• Self-timed Write Cycle (5 ms Max)
• High-reliability
  – Endurance: 1 Million Write Cycles
  –Data Retention: >100 Years
• 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead JEDEC SOIC, 8-lead TSSOP, 8-ball dBGA2 and 8-lead Ultra Thin Mini MAP Packages
• Lead-free/Halogen-free
• Available in Automotive
• Die Sales: Wafer Form, Waffle Pack, and Bumped Die

AT25256B 订货型号

AT25256B 技术支持

1. ATMEL 爱特梅尔EEPROM存储器AT25256B 数据手册DataSheet 下载. PDF（完整版）
2. 串行EEPROM 产品选型指南（ Excel 文档格式）
3. 中文版ATMEL 汽车应用解决方案 . pdf
4. 英文版ATMEL 汽车应用解决方案 . pdf
5. 嵌入式系统中EEPROM文件系统的设计与实现 . PDF
6. ATMEL 爱特梅尔公司全线产品目录. pdf