IC AT25D

The AT25DF021 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 AT25DF021, 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.
Single 2.3V - 3.6V or 2.7V - 3.6V Supply
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 and 3
66 MHz Maximum Operating Frequency
Clock-to-Output (tV) of 6 ns Maximum
Flexible, Optimized Erase Architecture for Code + Data Storage Applications
Uniform 4-Kbyte Block Erase
Uniform 32-Kbyte Block Erase
Uniform 64-Kbyte Block Erase
Full Chip Erase
Individual Sector Protection with Global Protect/Unprotect Feature
Four Sectors of 64 Kbytes Each
Hardware Controlled Locking of Protected Sectors via WP Pin
128-Byte Programmable OTP Security Register
Flexible Programming
Byte/Page Program (1 to 256 Bytes)
Fast Program and Erase Times
1.0 ms Typical Page Program (256 Bytes) Time
50 ms Typical 4-Kbyte Block Erase Time
250 ms Typical 32-Kbyte Block Erase Time
450 ms Typical 64-Kbyte Block Erase Time
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 at 20 MHz)
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