Features
- Single 2.5V - 3.6V Supply
- Serial Peripheral Interface (SPI) Compatible
- Supports SPI Modes 0 and 3
- Supports Dual and Quad Output Read
- 104MHz Maximum Operating Frequency
- Clock-to-Output (tV) of 6ns
- 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
- Hardware Controlled Locking of Protected Blocks via WP Pin
- 3 Protected Programmable Security Register Pages
- Flexible Programming
- Byte/Page Program (1 to 256 Bytes)
- Fast Program and Erase Times
- 0.7ms Typical Page Program (256 Bytes) Time
- 70ms Typical 4-Kbyte Block Erase Time
- 300ms Typical 32-Kbyte Block Erase Time
- 600ms Typical 64-Kbyte Block Erase Time
- JEDEC Standard Manufacturer and Device ID Read Methodology
- Low Power Dissipation
- 2μA Deep Power-Down Current (Typical)
- 10μA Standby current (Typical)
- 4mA Active Read 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 (150-mil and 208-mil)
- 8-pad Ultra-Thin DFN (5mm x 6mm x 0.6mm)
- Die in Wafer Form
Description
The AT25SF321 serial interface Flash memory device is 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 AT25SF321 is ideal for data storage as well, eliminating the need for additional data storage devices.
The erase block sizes of the AT25SF321 have been optimized to meet the needs of today's code and data storage applications. By optimizing the size of the erase blocks, the memory space can be used much more efficiently. Because certain code modules and data storage segments must reside by themselves in their own erase regions, the wasted and unused memory space that occurs with large block erase Flash memory devices can be greatly reduced. This increased memory space efficiency allows additional code routines and data storage segments to be added while still maintaining the same overall device density.
The device also contains three pages of Security Register that can be used for purposes such as unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key storage, etc. These Security Register pages can be individually locked.
Filters
Partner Solutions
Development ToolµISP is a compact standalone and universal solution, specifically designed for production environments, based on Algocrafts WriteNow! Technology. This is a standard tool for many families and devices and supports multi programming protocol (JTAG, SPI, UART, DAP, SWD, I2C, BDM, custom protocol, etc).Provided By: Algocraft Srl- Development ToolWriteNow! Series of In-System Programmers is a breakthrough in the programming industry. The programmers support a large number of devices (microcontrollers, memories, CPLDs and other programmable devices) from various manufacturers and have a compact size for easy ATE/fixture integration. They work in standalone or connected to a ...Provided By: Algocraft Srl
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- Development ToolµISP is a compact standalone and universal solution, specifically designed for production environments, based on Algocrafts WriteNow! Technology. This is a standard tool for many families and devices and supports multi programming protocol (JTAG, SPI, UART, DAP, SWD, I2C, BDM, custom protocol, etc).Provided By: Algocraft Srl
- Development ToolWriteNow! Series of In-System Programmers is a breakthrough in the programming industry. The programmers support a large number of devices (microcontrollers, memories, CPLDs and other programmable devices) from various manufacturers and have a compact size for easy ATE/fixture integration. They work in standalone or connected to a ...Provided By: Algocraft Srl
Partner Solutions (2)
Support Communities
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AT25SF321B and AT25SF321 Programming
Is there a difference between AT25SF321B and AT25SF321 other than speed and operating voltage and with a programmer that can program AT25SF321, can I program AT25SF321B too?
Sep 22, 2022 -
AT25SF321 clock problem
Hi, Currently I am working on a project that uses the memory AT25SF321. In some devices the flash operates at 40MHz perfectly and in other devices the flash does not work properly at clock frequencies higher than 33MHz (same hardware and firmware). For instance, when I read the manufacturer and ...
Nov 19, 2021 -
Detecting #WP pin state on AT25FF321A and AT25SF321B
For both the AT25FF321A and AT25SF321B that are configured for hardware protection with the #WP pin (SRP1,0 = 01) what is the lowest impact way of detecting the state of the #WP pin (ability to write to status registers)? As most of the R/W status register ...
Nov 14, 2021
Knowledge Base
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"B" suffix NOR flash Part numbers
... is a newer part than a part without the suffix "B". It has enhanced features. Example AT25SF321 vs AT25SF321B ==> AT25SF321B is a newer part than AT25SF321. AT25SF321B has new additional commands and improved performance. AT25SF321B has a 108 MHz Maximum Operating Frequency vs 104 MHz for AT25SF321 AT25SF321B Operating voltages ...
Apr 13, 2023
Support Communities
