The 24LC16BT-I/OT: A Compact Powerhouse for Serial Data Storage

In the realm of embedded systems and electronic design, reliable non-volatile memory is a fundamental component for storing configuration data, calibration constants, or event logs. The Microchip 24LC16BT-I/OT stands out as a highly versatile and widely adopted solution, offering 16 kilobits (2 Kbytes) of Electrically Erasable Programmable Read-Only Memory (EEPROM) in a minuscule package. This memory chip leverages the ubiquitous I²C (Inter-Integrated Circuit) serial communication protocol, making it an ideal choice for a vast array of applications where space, power, and simplicity are at a premium.

Key Features and Architectural Advantages

The 24LC16BT is organized as 256 pages of 8 bytes each, providing a flexible structure for data handling. Its core strength lies in its two-wire serial interface, comprising a Serial Clock (SCL) and Serial Data (SDA) line. This drastically reduces the number of I/O pins required on the host microcontroller, simplifying board layout and freeing up critical resources for other functions. The device supports bidirectional data transfer at speeds of up to 400 kHz, ensuring efficient and speedy read/write operations for most common tasks.

A critical feature for systems operating in noisy environments or with unstable power is hardware write-protection. The 24LC16BT-I/OT provides this via a dedicated WP (Write Protect) pin. When this pin is tied to VCC, the entire memory array becomes locked against write attempts, safeguarding vital data from accidental corruption. Furthermore, the chip is designed for low-power operation, consuming just 1 mA (typical) during active read/write and boasting a standby current of just 1 µA (max), which is essential for battery-powered devices.

Package and Applications

The "-I/OT" suffix denotes a specific package: an SOT-23-5. This ultra-small form factor is incredibly space-efficient, making it perfect for modern, miniaturized consumer electronics, wearable technology, and dense PCBs where every square millimeter counts. Its operating voltage range of 1.7V to 5.5V allows for seamless integration into both 3.3V and 5V systems.

Typical applications are extensive and include:

Storing user settings in smart home devices and IoT sensors.

Holding calibration data in medical instruments and industrial controllers.

Acting as a small data logger in portable equipment.

Servicing as a serial number or parameter storage device in computing peripherals.

ICGOODFIND: The Microchip 24LC16BT-I/OT is a quintessential serial EEPROM, masterfully balancing capacity, physical size, and power efficiency. Its adherence to the standard I²C protocol ensures exceptional compatibility, making it a go-to component for designers seeking a proven, reliable, and compact non-volatile memory solution.

Keywords: I²C EEPROM, Non-volatile Memory, Low-power, SOT-23 Package, Serial Communication