Microchip 24LC16B-I/SN: A 16-Kbit I²C Serial EEPROM for Low-Voltage Data Storage

In the realm of embedded systems and IoT devices, the need for reliable, low-power, and compact non-volatile memory is paramount. The Microchip 24LC16B-I/SN stands out as a quintessential solution, engineered to provide efficient data storage in space-constrained and power-sensitive applications. This 16-Kbit (2048 x 8) serial EEPROM memory leverages the ubiquitous I²C (Inter-Integrated Circuit) protocol for communication, making it an ideal choice for a wide array of consumer, industrial, and automotive electronics.

A defining feature of the 24LC16B-I/SN is its operation at low voltage, supporting a broad range from 1.7V to 5.5V. This flexibility allows it to be seamlessly integrated into systems powered by a single-cell lithium battery or other low-voltage sources, extending the operational life of portable and battery-powered devices. Its low-power characteristics are further highlighted by an impressive standby current of just 1 µA (max.), ensuring minimal energy drain when not actively accessed.

The memory is organized as eight blocks of 256 bytes each, providing a straightforward architecture for efficient data management. It supports byte-level and page-level write operations, with a 16-byte page write buffer that simplifies firmware design and accelerates data storage tasks. The device also features hardware write-protection via a dedicated WP (Write Protect) pin. When asserted, this pin safeguards the entire memory array from inadvertent writes, a critical function for preserving configuration data and ensuring system integrity.

Housed in a compact 8-lead SOIC (SN) package, this EEPROM is designed for high-density PCB layouts. Its endurance of 1 million erase/write cycles and data retention of over 200 years guarantee long-term reliability. Furthermore, it operates across an extended industrial temperature range (-40°C to +85°C), making it robust enough for harsh environments.

The integrated I²C interface supports clock speeds up to 400 kHz, enabling efficient communication with host microcontrollers while keeping the pin count low. With three address pins, up to eight of these devices can be connected on the same bus, allowing for easy memory expansion without complicating the system design.

ICGOOODFIND: The Microchip 24LC16B-I/SN is a highly capable and resilient serial EEPROM, offering an optimal blend of low-voltage operation, minimal power consumption, and robust data protection features. Its compatibility with the standard I²C bus and compact form factor make it a superior choice for designers seeking reliable non-volatile memory in modern electronic products.

Keywords: I²C EEPROM, Low-Voltage Memory, Non-Volatile Storage, Serial Memory, Write Protection