Microchip 25C320-I/SN: A 32K SPI Bus Serial EEPROM for Robust Data Storage

In the realm of embedded systems and IoT devices, reliable non-volatile memory is a cornerstone for storing critical parameters, configuration data, and event logs. The Microchip 25C320-I/SN stands out as a high-performance, 32-kilobit (4KB) Serial Peripheral Interface (SPI) bus EEPROM designed to meet these demanding needs. Its combination of hardware and software features makes it an ideal choice for a vast array of applications.

Key Features of the 25C320-I/SN

This device is engineered for efficiency and resilience. Its SPI interface supports speeds up to 10 MHz, enabling rapid data transfer and efficient communication with a host microcontroller, which is crucial for time-sensitive operations. The memory array is organized as 4096 words of 8 bits each, providing ample space for essential data.

A critical feature for applications operating in electrically noisy environments is its robust hardware data protection. The 25C320 incorporates both block write protection and a built-in hardware write-protect (WP) pin. This allows sections of the memory array (1/4, 1/2, or the entire array) to be locked against accidental writes, safeguarding vital firmware or data from corruption.

Furthermore, the chip boasts an impressive endurance of 1,000,000 erase/write cycles and a data retention period of over 200 years, ensuring long-term reliability. It operates across a broad voltage range (1.8V to 5.5V) and an industrial temperature range (-40°C to +85°C), making it suitable for everything from consumer electronics to harsh industrial settings. The compact 8-lead SOIC (SN) package is perfect for space-constrained PCB designs.

Diverse Application Landscape

The 25C320-I/SN's feature set lends itself to numerous sectors:

Automotive Systems: Storing calibration data, VIN numbers, and event recorder logs in a resilient manner.

Industrial Automation: Housing configuration parameters for sensors, PLCs, and motor drives where noise immunity is paramount.

Consumer Electronics: Used in smart meters, printers, and set-top boxes to store user settings and operational data.

Medical Devices: Providing secure storage for device calibration and usage history logs.

IoT Nodes: Storing network credentials and sensor data in low-power, battery-operated devices.

ICGOOODFIND

The Microchip 25C320-I/SN is a highly reliable and versatile SPI EEPROM solution. Its exceptional hardware write protection, high-speed SPI interface, and outstanding endurance make it a superior choice for designers who prioritize data integrity and system robustness across automotive, industrial, and consumer applications.

Keywords:

SPI EEPROM

Hardware Write Protection

Non-volatile Memory

Embedded Systems

Data Integrity