The AT24C01D-XHM-B: A Compact Powerhouse for Serial Data Storage

In the realm of embedded systems and IoT devices, efficient and reliable non-volatile memory is a fundamental requirement. The AT24C01D-XHM-B, a 1Kb I2C Serial EEPROM memory chip from Microchip Technology, stands out as a quintessential solution for applications demanding minimal space, low power consumption, and simple interfacing. This device provides a robust method for storing critical data—from configuration settings and calibration coefficients to user preferences and historical logs—ensuring information is retained even when primary power is disconnected.

Engineered for versatility, this EEPROM organizes its 1 kilobit (128 bytes) of memory into a page structure of 8 bytes per page. It supports operation across a broad voltage range (1.7V to 5.5V), making it compatible with a wide array of modern microcontrollers, from low-power 1.8V systems to legacy 5V designs. A key to its low-power advantage is its current consumption of just 1 mA (max) during active write operations and a standby current of a mere 1 µA, which is crucial for battery-powered applications.

Communication is handled via the ubiquitous I2C (Inter-Integrated Circuit) serial protocol, a two-wire interface comprising Serial Data (SDA) and Serial Clock (SCL) lines. This bus structure allows for efficient communication and enables up to eight devices to be connected on the same bus, as the device address is configurable through three hardware address pins. The built-in write-protect (WP) pin offers additional hardware security, allowing the entire memory array to be locked against inadvertent write operations, thus safeguarding stored data.

The AT24C01D-XHM-B also features high reliability with endurance of 1 million write cycles and data retention of 100 years, ensuring long-term data integrity. Its extended temperature range (-40°C to +85°C) qualifies it for use in industrial and automotive environments beyond standard commercial applications.

ICGOODFIND: The AT24C01D-XHM-B is an optimal choice for designers seeking a proven, ultra-low-power, and highly reliable serial EEPROM solution. Its combination of a tiny form factor, simple I2C interface, and robust feature set makes it an indispensable component for countless data storage tasks in modern electronics.

Keywords: I2C Interface, EEPROM Memory, Low-Power, Non-Volatile, Data Storage