The Microchip 24FC128-I/ST: A Deep Dive into a High-Density I2C Serial EEPROM

In the realm of embedded systems and electronic design, reliable non-volatile memory is a cornerstone for data storage and configuration. The Microchip 24FC128-I/ST stands out as a premier solution, offering designers a robust and versatile 128-Kbit serial EEPROM memory chip. This device exemplifies the perfect blend of high capacity, industry-standard interfacing, and exceptional reliability for a wide array of applications, from consumer electronics to industrial systems.

Housed in a space-saving TSSOP-8 package, the 24FC128-I/ST is built for modern, compact PCB designs. Its core functionality is governed by the ubiquitous I2C (Inter-Integrated Circuit) serial interface, which allows for communication with a host microcontroller using only two bidirectional lines: Serial Data (SDA) and Serial Clock (SCL). This two-wire interface drastically reduces system wiring, simplifies board layout, and minimizes pin count usage on the controlling MCU. The chip supports a wide voltage range from 1.7V to 5.5V, making it compatible with both lower-voltage modern processors and legacy 5V systems.

Organized as 16,384 words of 8 bits each (16K x 8), this EEPROM provides ample storage for critical data. Key features that enhance its performance include:

Page Write Buffer: The device features a 64-byte page write buffer, enabling more efficient writing of data blocks and significantly reducing total write time compared to single-byte writes.

Advanced Write Protection: Data integrity is safeguarded through hardware write-protect functionality. The WP pin can be asserted to prevent any write operations, protecting critical memory segments from accidental corruption.

High-Speed Performance: With a clock frequency of up to 400 kHz (Fast-mode Plus compatible), it ensures swift data transfer rates suitable for performance-sensitive applications.

High Endurance and Retention: The 24FC128-I/ST is specified for 1,000,000 erase/write cycles per byte and offers data retention of over 200 years, guaranteeing long-term data integrity.

Typical applications are vast and include storing calibration data, user settings, transaction records, and system configuration parameters in products such as smart meters, automotive modules, medical devices, networking equipment, and IoT sensors.

ICGOODFIND Summary:

The Microchip 24FC128-I/ST is a highly reliable and efficient 128-Kbit serial EEPROM. Its I2C interface and compact form factor make it an ideal choice for designers seeking to add substantial non-volatile memory without complicating their design. Its robust feature set, including hardware write-protection and high endurance, ensures data security and longevity, solidifying its position as a go-to component for professional electronic designs.

Keywords:

1. I2C EEPROM

2. Non-volatile Memory

3. 128-Kbit

4. Page Write

5. Hardware Write-Protect