24LC128

The 24LC128 is a 128-kilobit (16 Kbytes) serial electrically erasable programmable read-only memory (EEPROM) manufactured by Microchip Technology. It operates on a 2-wire interface compliant with the I²C protocol, enabling efficient communication with microcontrollers and other digital systems. The device supports standard mode (up to 100 kHz) and fast mode (up to 400 kHz), allowing flexibility in system design and performance optimization. This EEPROM features a 128-byte page write capability, which enhances write efficiency compared to byte-by-byte programming. Data retention is guaranteed for up to 200 years at 25°C, ensuring long-term reliability for critical applications. The 24LC128 offers an endurance of 1 million write cycles, making it suitable for applications requiring frequent data updates without degradation. The memory is organized into 16,384 words of 8 bits each, accessible via a 7-bit device address and a 16-bit word address. This structure allows precise addressing across the full memory space while maintaining compatibility with standard I²C bus configurations. The device also includes built-in write protection mechanisms, such as hardware write-protect pins and software-based write enable/disable controls, enhancing data security against unintended modifications. Designed for low-power operation, the 24LC128 consumes only 3.5 mA during active read or write operations and less than 1 μA in standby mode, making it ideal for battery-powered or energy-efficient systems. Its operating voltage range spans from 1.7 V to 5.5 V, accommodating various power supply environments including both 3.3 V and 5 V logic families. Common applications include industrial control systems, consumer electronics, automotive diagnostics, medical devices, and embedded systems where non-volatile storage of configuration settings, calibration data, or user preferences is essential. The chip’s small footprint, robust packaging options (such as 8-pin DIP, SOIC, and TSSOP), and compatibility with existing I²C infrastructure make it a reliable choice for designers seeking scalable, durable memory solutions.