Overview
The AT45DB321D-SU-2.5-SL383, produced by Adesto Technologies, is a 32-megabit serial interface, sequential access flash memory. This device is ideally suited for a wide variety of digital voice-, image-, program code-, and data-storage applications. It operates on a single 2.5V to 3.6V power supply and supports the Atmel RapidS serial interface, which is SPI compatible up to 66MHz. The AT45DB321D is designed to provide high-speed operations, low power dissipation, and robust data protection features, making it a versatile component for various commercial and industrial applications.
Key Specifications
| Parameter | Value |
|---|---|
| Memory Size | 32Mb (528 bytes x 8192 pages) |
| Supply Voltage | 2.5V - 3.6V or 2.7V - 3.6V |
| Interface | SPI, RapidS (up to 66MHz) |
| Page Size | 512 bytes or 528 bytes per page |
| Number of Pages | 8192 pages |
| Erase Options | Page erase (512 bytes), Block erase (4KB), Sector erase (64KB), Chip erase (32Mb) |
| SRAM Buffers | Two SRAM buffers (512/528 bytes each) |
| Active Read Current | 7mA typical |
| Standby Current | 25µA typical |
| Deep Power Down Current | 15µA typical |
| Operating Temperature | -40°C to 85°C |
| Data Retention | 20 years |
| Program/Erase Cycles | 100,000 cycles per page minimum |
| Package | 8-SOIC (0.209", 5.30mm Width) |
Key Features
- High-Speed Interface: Supports Atmel RapidS serial interface up to 66MHz, which is SPI compatible in modes 0 and 3.
- Flexible Memory Architecture: Memory array divided into sectors, blocks, and pages, allowing for page, block, sector, or chip-level erase operations.
- Low Power Dissipation: Typical active read current of 7mA, standby current of 25µA, and deep power down current of 15µA.
- Data Protection: Hardware and software data protection features including individual sector lockdown, 128-byte security register, and 64-byte user programmable space.
- Continuous Read Capability: Allows continuous read operations through the entire array, ideal for code shadowing applications.
- SRAM Buffers: Two SRAM buffers of 512/528 bytes each, enabling data reception while reprogramming the flash array.
- Green Packaging: Pb/halide-free/RoHS compliant packaging options.
Applications
- Digital Voice and Image Storage: Suitable for storing digital voice and image data in various consumer and industrial devices.
- Program Code and Data Storage: Ideal for storing program code and data in embedded systems, IoT devices, and other applications requiring high-density, low-pin count memory.
- Code Shadowing Applications: Optimized for code shadowing, where code is transferred from flash to RAM for execution.
- Commercial and Industrial Systems: Used in various commercial and industrial systems where low power, high density, and low-pin count are essential.
Q & A
- What is the memory size of the AT45DB321D-SU-2.5-SL383?
The memory size is 32 megabits, organized as 8192 pages of 512 or 528 bytes each.
- What are the supported interface modes?
The device supports SPI compatible modes 0 and 3, as well as the Atmel RapidS serial interface up to 66MHz.
- What are the power supply requirements?
The device operates on a single 2.5V to 3.6V power supply.
- What are the erase options available?
Erase operations can be performed at the chip, sector, block, or page level.
- How many SRAM buffers does the device have?
The device has two SRAM buffers, each of 512/528 bytes.
- What is the typical active read current?
The typical active read current is 7mA.
- What is the data retention period?
The data retention period is 20 years.
- How many program/erase cycles are supported per page?
The device supports a minimum of 100,000 program/erase cycles per page.
- What is the operating temperature range?
The operating temperature range is -40°C to 85°C.
- Is the packaging RoHS compliant?
Yes, the packaging is Pb/halide-free/RoHS compliant.
