The Microchip 24LC128T-I/ST: A High-Density I2C Serial EEPROM Solution

In the realm of embedded systems and data storage, the need for reliable, non-volatile memory in a compact form factor is paramount. The Microchip 24LC128T-I/ST stands out as a premier solution, offering 128 Kbits (16 Kbytes) of electrically erasable memory in a space-saving TSSOP-8 package. This device is engineered for a vast array of applications, from consumer electronics to industrial systems, where data integrity and low-power operation are critical.

A key strength of this memory chip is its utilization of the ubiquitous I2C (Inter-Integrated Circuit) serial interface. This two-wire communication protocol drastically reduces the number of I/O pins required to connect the memory to a host microcontroller (MCU), simplifying board layout and freeing up precious MCU resources for other functions. The 24LC128T-I/ST supports a 400 kHz clock frequency, enabling efficient and sufficiently fast data transfer for most applications. It also features hardware write-protection via its WP (Write Protect) pin, providing an essential safety mechanism to prevent accidental data corruption.

The EEPROM is organized as 16,384 words of 8 bits each, offering byte-level read and write capability. This allows individual data bytes to be updated without the need to erase and rewrite an entire memory sector, a significant advantage over flash memory for frequently changing small data sets. Its endurance of 1,000,000 erase/write cycles and data retention of over 200 years ensure long-term reliability. Furthermore, it operates over an extensive voltage range (1.7V to 5.5V) and is specified for the demanding industrial temperature range (-40°C to +85°C), making it robust enough for harsh environments.

Typical applications include storing:

System configuration and calibration data

Data logging in metering and IoT sensors

User preference settings in consumer appliances

Security and identification information

ICGOODFIND: The Microchip 24LC128T-I/ST is an exceptional choice for designers seeking a high-density, reliable, and low-power serial EEPROM. Its industry-standard I2C interface, robust feature set, and proven performance make it a versatile and trustworthy component for virtually any project requiring non-volatile memory.

Keywords: I2C Interface, Serial EEPROM, Non-Volatile Memory, Industrial Temperature, Low-Power