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AT45DB021B-SU Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
AT45DB021B-SUAtmel1043Yes

AT45DB021B-SU** is a **2-megabit (256K x 8) Serial-Interface Flash Memory** manufactured by **Atmel** (now part of Microchip Technology).

The AT45DB021B-SU is a 2-megabit (256K x 8) Serial-Interface Flash Memory manufactured by Atmel (now part of Microchip Technology).

Key Specifications:

  • Memory Size: 2Mb (256KB)
  • Interface: SPI (Serial Peripheral Interface)
  • Operating Voltage: 2.7V to 3.6V
  • Max Clock Frequency: 85 MHz
  • Page Size: 264 bytes (standard) or 256 bytes (binary)
  • Page Count: 1024 pages
  • Sector Architecture: 8 sectors (256 pages each)
  • Erase/Program Operations:
  • Page Program (1 to 256 bytes)
  • Sector Erase (256 pages)
  • Chip Erase (full memory)
  • Endurance: 100,000 write cycles per page
  • Data Retention: 20 years
  • Operating Temperature Range: -40°C to +85°C
  • Package: 8-lead SOIC (150-mil)

Features:

  • High-Speed SPI Interface (up to 85 MHz)
  • Flexible Page & Sector Erase
  • Built-in SRAM Buffer for efficient data transfer
  • Low Power Consumption (active & standby modes)
  • Hardware & Software Protection for data security
  • JEDEC Standard Manufacturer & Device ID

This device is commonly used in embedded systems, data logging, industrial controls, and consumer electronics requiring reliable non-volatile storage.

*(Note: Atmel was acquired by Microchip Technology in 2016, and the product may now be listed under Microchip’s branding.)*

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