Overview
The AT25DF321A-SH-T is a 32-Mbit serial interface Flash memory device designed by Adesto Technologies (previously part of Renesas and Microchip Technology). This device is part of the System Enhancing class of code and data storage solutions, making it suitable for a wide range of high-volume consumer and industrial applications. It supports program code shadowing from Flash memory into embedded or external RAM for execution, and its flexible erase architecture makes it ideal for both code and data storage.
The device complies with the full industrial temperature range and is available in industry-standard green (Pb/Halide-free/RoHS compliant) package options, including 8-lead SOIC and 8-pad Ultra Thin DFN packages.
Key Specifications
| Specification | Value |
|---|---|
| Capacity | 32 Mbit (256 Bytes x 16384 pages) |
| Supply Voltage Range | 2.7V to 3.6V |
| Interface | Serial Peripheral Interface (SPI) |
| Erase Granularity | 4-Kbytes to 64-Kbytes sectors |
| Package Options | 8-lead SOIC, 8-pad Ultra Thin DFN (5 x 6 x 0.6mm) |
| Temperature Range | Full Industrial Temperature Range |
| Compliance | RoHS Compliant, Pb/Halide-free |
Key Features
- Sophisticated sector protection mechanisms, including individual sector protection, global protect/unprotect, and sector lockdown for permanent read-only sectors.
- One-Time Programmable (OTP) Security Register for unique device serialization, Electronic Serial Number (ESN) storage, and locked key storage.
- Dual-input program mode and support for SPI Modes 0 and 3.
- Efficient memory space usage with optimized physical sectoring and erase block sizes.
- No separate voltage required for programming and erasing.
Applications
The AT25DF321A-SH-T is designed for various applications, including:
- Boot/code shadowing: Program code is shadowed from Flash memory into embedded or external RAM for execution.
- Data logging: Efficient data logging with the 256-byte page erase feature.
- Secure applications: Permanent read-only sectors and OTP Security Register ensure secure storage of program code, data modules, and security information.
- Industrial and consumer electronics: Suitable for high-volume consumer and industrial applications requiring reliable and efficient code and data storage.
Q & A
- What is the capacity of the AT25DF321A-SH-T?
The AT25DF321A-SH-T has a capacity of 32 Mbit (256 Bytes x 16384 pages).
- What is the supply voltage range for the AT25DF321A-SH-T?
The supply voltage range is 2.7V to 3.6V.
- What types of packages are available for the AT25DF321A-SH-T?
The device is available in 8-lead SOIC and 8-pad Ultra Thin DFN packages.
- Does the AT25DF321A-SH-T support sector protection?
Yes, it supports individual sector protection, global protect/unprotect, and sector lockdown for permanent read-only sectors.
- What is the purpose of the OTP Security Register?
The OTP Security Register is used for unique device serialization, Electronic Serial Number (ESN) storage, locked key storage, etc.
- What are the supported SPI modes?
The device supports SPI Modes 0 and 3.
- Is the AT25DF321A-SH-T RoHS compliant?
Yes, the device is RoHS compliant and Pb/Halide-free.
- What is the erase granularity of the AT25DF321A-SH-T?
The erase granularity ranges from 4-Kbytes to 64-Kbytes sectors.
- Does the AT25DF321A-SH-T require a separate voltage for programming and erasing?
No, it does not require a separate voltage for programming and erasing.
- What are some common applications of the AT25DF321A-SH-T?
Common applications include boot/code shadowing, data logging, secure applications, and various industrial and consumer electronics.
