Description
The AT25DF321 is a serial interface Flash memory device designed for use in a wide variety of high-volume consumer based applications in which program code is shadowed from Flash memory into embedded or external RAM for execution. The flexible erase architecture of the AT25DF321, with its erase granularity as small as 4-Kbytes, makes it ideal for data storage as well, eliminating the need for additional data storage
EEPROM devices.

FEATUREs
• Single 2.7V - 3.6V Supply
• Serial Peripheral Interface (SPI) Compatible
– Supports SPI Modes 0 and 3
• 70 MHz Maximum Clock Frequency
• Flexible, Uniform Erase Architecture
– 4-Kbyte Blocks
– 32-Kbyte Blocks
– 64-Kbyte Blocks
– Full Chip Erase
• Individual Sector Protection with Global Protect/Unprotect Feature
– Sixty-Four 64-Kbyte Physical Sectors
• Hardware Controlled Locking of Protected Sectors
• Flexible Programming
– Byte/Page Program (1 to 256 Bytes)
• Automatic Checking and Reporting of Erase/Program Failures
• JEDEC Standard Manufacturer and Device ID Read Methodology
• Low Power Dissipation
– 7 mA Active Read Current (Typical)
– 15 µA Deep Power-Down Current (Typical)
• Endurance: 100,000 Program/Erase Cycles
• Data Retention: 20 Years
• Complies with Full Industrial Temperature Range
• Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options
– 8-lead SOIC (200-mil wide)
– 16-lead SOIC (300-mil wide)