The Microchip 25AA128T-I/ST: A High-Performance 128K SPI Serial EEPROM Solution

In the realm of embedded systems and IoT devices, the need for reliable, non-volatile memory for data logging, configuration storage, and parameter setting is paramount. The Microchip 25AA128T-I/ST stands out as a robust and highly efficient solution, offering 128 Kbits of serial EEPROM memory accessible through a simple and widely adopted Serial Peripheral Interface (SPI) bus.

This device is engineered for superior performance and low-power operation, making it an ideal choice for a vast array of applications, from industrial automation and automotive systems to consumer electronics and smart sensors. Its SPI interface supports clock frequencies up to 10 MHz, enabling high-speed data transfer which is crucial for time-sensitive operations. The memory array is organized as 16,384 bytes, each byte being individually programmable, offering exceptional flexibility for data management.

A key feature of the 25AA128T is its advanced write-protection capabilities. A dedicated Write-Protect (WP) pin and programmable protection bits allow users to safeguard a portion or the entire memory array from inadvertent writes, ensuring critical data integrity. Furthermore, it boasts a remarkable endurance of over 1 million erase/write cycles and a data retention period of more than 200 years, providing long-term reliability that designers can depend on.

Housed in a space-saving 8-lead TSSOP package, this EEPROM is designed for compact PCB layouts. Its extended industrial temperature range (-40°C to +85°C) ensures stable operation in harsh environmental conditions. The inclusion of a 16-byte page write buffer significantly enhances write efficiency by allowing up to 16 bytes to be written in a single operation, reducing overall write time and power consumption.

ICGOOODFIND: The Microchip 25AA128T-I/ST is a top-tier component that delivers high density, robust data protection, and industry-leading endurance in a minimal footprint, making it an excellent choice for demanding embedded memory applications.

Keywords: SPI Interface, Serial EEPROM, Non-volatile Memory, Data Retention, Write Protection