The Microchip 24LC256T-I/SN: A Deep Dive into a Versatile 256K I2C Serial EEPROM

In the realm of embedded systems and electronics design, reliable non-volatile memory is a fundamental component for data storage and configuration settings. The Microchip 24LC256T-I/SN stands out as a highly capable and widely adopted solution, offering 256 kilobits (32 kilobytes) of Electrically Erasable Programmable Read-Only Memory (EEPROM). This serial memory chip provides a simple and efficient method for storing critical data that must be retained even when system power is removed.

A key feature of the 24LC256T-I/SN is its utilization of the I2C (Inter-Integrated Circuit) serial communication protocol. This two-wire interface, comprising a serial data line (SDA) and a serial clock line (SCL), drastically reduces the number of pins required to connect the memory to a microcontroller. This simplicity makes it an ideal choice for space-constrained PCB designs and helps lower overall system cost. The device supports a 400 kHz clock speed, enabling efficient data transfer rates for a wide array of applications.

The memory array is organized as 32,768 words of 8 bits each. A crucial advantage of this EEPROM is its byte-level read and write capability. This allows individual data bytes to be modified without the need to erase and rewrite an entire memory sector, streamlining data management and enhancing operational flexibility. The chip also features hardware write-protection via a dedicated pin (WP). When connected to VCC, the entire memory array is protected from inadvertent write operations, safeguarding vital data from corruption.

Designed for robustness, the 24LC256T-I/SN is specified for endurance of 1,000,000 erase/write cycles per byte and offers data retention of over 200 years. Its extended industrial temperature range (-40°C to +85°C) ensures stable and reliable performance in harsh environmental conditions, making it suitable for automotive, industrial, and consumer applications. Housed in a compact 8-lead SOIC package, it is well-suited for modern, high-density board layouts.

From storing calibration data and system parameters to logging operational events in consumer electronics, industrial controllers, and IoT devices, the 24LC256T-I/SN provides a dependable and easy-to-integrate memory solution.

ICGOODFIND: The Microchip 24LC256T-I/SN is a cornerstone of serial memory design, offering a perfect blend of high density, simple I2C interface, and exceptional reliability. Its byte-level accessibility and robust construction make it an excellent choice for developers seeking a proven non-volatile memory component for their next project.

Keywords: I2C EEPROM, Non-volatile Memory, Serial Communication, 256Kbit, Microchip Technology