Microchip 25AA128T-I/SN: A High-Performance 128K SPI Serial EEPROM for Embedded Systems

The Microchip 25AA128T-I/SN is a 128-Kbit serial EEPROM device that utilizes the widely adopted Serial Peripheral Interface (SPI) bus, making it an ideal solution for applications requiring reliable non-volatile memory with a simple communication interface. This device is part of Microchip's extensive memory portfolio, renowned for its high reliability, low power consumption, and robust performance across industrial and commercial temperature ranges.

Operating at voltages from 1.8V to 5.5V, the 25AA128T-I/SN offers flexibility for both low-power and mainstream embedded systems. Its SPI interface supports clock frequencies up to 10 MHz, enabling high-speed data transfer, which is critical for applications demanding rapid read and write operations. The memory is organized as 16,384 bytes, each byte being individually addressable, providing fine-grained control for data storage and retrieval.

A key feature of this EEPROM is its hardware write-protection capability via a dedicated pin (WP), allowing sections of the memory array to be protected from inadvertent writes. This is particularly valuable in systems where data integrity is paramount. Additionally, the device includes advanced write protection schemes, including block protection and sequential write prevention, further enhancing data security.

The 25AA128T-I/SN also boasts a high endurance of 1 million erase/write cycles and a data retention period of over 200 years, ensuring long-term reliability. Its low power consumption—with a standby current of just 1 µA—makes it suitable for battery-powered and energy-sensitive applications such as IoT devices, smart sensors, and portable medical equipment.

Packaged in an 8-pin SOIC (SN) package, the device is compact and easy to integrate into space-constrained designs. Its compatibility with standard SPI protocols simplifies firmware development and reduces time to market.

ICGOO FIND: The Microchip 25AA128T-I/SN stands out as a versatile and dependable SPI EEPROM, combining high-speed performance, extensive durability, and flexible integration options, making it a top choice for modern embedded memory needs.

Keywords:

SPI EEPROM

Non-volatile Memory

Hardware Write-Protection

Low Power Consumption

High Endurance