Exploring the Microchip 24LC256-E/ST: A High-Density I2C Serial EEPROM Solution

The Microchip 24LC256-E/ST is a 256-Kilobit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) integrated circuit, designed for applications requiring reliable non-volatile data storage with minimal pin count. Organized as 32,768 words of 8 bits each, this memory chip provides a robust solution for storing configuration parameters, calibration data, or event logs in embedded systems.

Operating over a broad voltage range of 1.7V to 5.5V, the device is suitable for both 3.3V and 5V systems, enhancing its versatility across diverse applications. It supports the I2C (Inter-Integrated Circuit) protocol, a widely adopted two-wire serial interface that simplifies communication with microcontrollers and other digital components while reducing board space and wiring complexity. The chip features bidirectional data transfer, supporting speeds of up to 400 kHz (at 1.7V) and 1 MHz (at 5V), ensuring efficient data access in time-critical systems.

A key attribute of the 24LC256-E/ST is its hardware write-protection feature. By connecting the WP (Write Protect) pin to VCC, the entire memory array can be locked against inadvertent write operations, safeguarding critical data from corruption. The EEPROM also boasts high endurance, capable of sustaining 1,000,000 erase/write cycles per byte, and offers data retention of over 200 years, ensuring long-term reliability.

Housed in an 8-lead TSSOP package, the device is ideal for space-constrained designs. Its extended temperature range (-40°C to +125°C) makes it suitable for industrial, automotive, and harsh-environment applications.

ICGOODFIND: The Microchip 24LC256-E/ST stands out as a high-performance, reliable serial EEPROM, offering high density, low power consumption, and robust data integrity for modern embedded systems.

Keywords:

I2C EEPROM

Non-volatile Memory

256Kbit

Serial Memory

Write Protection