Adesto Technologies AT45DB321E-SHF-T
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.209", 5.30mm Width) |
| Mfr | Adesto Technologies |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TC) |
| Technology | FLASH |
| Supplier Device Package | 8-SOIC |
| Memory Size | 32Mbit |
| Memory Type | Non-Volatile |
| Voltage - Supply | 2.3V ~ 3.6V |
| Clock Frequency | 85 MHz |
| Memory Organization | 528 Bytes x 8192 pages |
| Memory Format | FLASH |
| Memory Interface | SPI |
| Write Cycle Time - Word, Page | 8µs, 4ms |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | AT45DB321 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,000 |
| ECCN | 3A991B1A |
| HTSUS | 8542.32.0071 |
AT45DB321E-SHF-T 32Mbit SPI Flash memory, Serial Flash 32Mbit SPI 85 MHz 8-SOIC
The AT45DB321E-SHF-T is a high-performance 32Mbit (4MB) Serial Flash Memory device from Microchip Technology, designed for data storage applications in industrial, automotive, and consumer electronics. Utilizing an advanced SPI (Serial Peripheral Interface) bus architecture, this memory chip offers flexible page-based programming with 528-byte main memory pages and an additional 512-byte SRAM buffer, enabling efficient data transfers without requiring full sector erasures. Operating across a wide voltage range (2.7V to 3.6V) and featuring low power consumption (4mA active read current, 2µA standby current), the AT45DB321E-SHF-T provides an optimal balance of performance and energy efficiency. Its industrial temperature range (-40°C to +85°C) and high reliability make it suitable for mission-critical applications requiring non-volatile data storage with fast access times.
Key Features and Benefits
The AT45DB321E-SHF-T distinguishes itself with its unique dual-buffer architecture, allowing simultaneous read/write operations for continuous data streaming applications. The device supports standard SPI clock rates up to 85MHz, delivering throughput up to 17MB/s, significantly faster than conventional EEPROM solutions. Its flexible erase architecture enables byte-level alterability without full block erasure, while the built-in hardware data protection features include sector lock-down capability and software-controlled protection for secure data storage. The 10,000 erase/write cycle endurance and 20-year data retention ensure long-term reliability, with additional benefits including a small 8-pin SOIC package footprint and industry-standard pinout for easy design integration. The deep power-down mode (0.1µA typical) makes it ideal for battery-powered applications.
Applications and Use Cases
This serial flash memory is widely deployed in industrial automation systems for firmware storage and data logging, particularly in PLC configurations and sensor networks. In automotive electronics, it serves critical roles in ECU parameter storage, event data recorders, and infotainment systems. Consumer applications include digital cameras (for image buffering), set-top boxes, and gaming consoles requiring fast non-volatile storage. The AT45DB321E-SHF-T is particularly valuable in IoT edge devices for over-the-air (OTA) firmware updates, medical devices for patient data storage, and telecommunications equipment where its high-speed serial interface enables rapid configuration loading. Its radiation-tolerant characteristics also make it suitable for aerospace applications.
Alternative Serial Flash IC Models
● AT25DF321A: Similar 32Mbit density with uniform 4KB sector architecture
● W25Q32JV: Winbond 32Mbit SPI Flash with quad I/O support (104MHz)
● MX25L3233F: Macronix 32Mbit with faster 108MHz clock rate
● S25FL116K: Cypress 16Mbit Flash with enhanced security features
● M25P40: STMicro 4Mbit solution for cost-sensitive applications
