AT24C32D-XHM-T: A Deep Dive into Microchip's 32K I2C Serial EEPROM

In the realm of embedded systems and IoT devices, reliable non-volatile memory is a fundamental component for storing configuration data, calibration constants, and operational logs. The AT24C32D-XHM-T from Microchip Technology stands as a prominent solution in this space, offering a robust and efficient method for data storage. This 32-Kbit serial EEPROM memory chip combines high density with the ubiquitous I2C interface, making it an ideal choice for a vast array of applications.

The core of the AT24C32D's functionality is its Two-Wire Serial Interface (I2C). This industry-standard protocol allows for communication with just two bidirectional lines: Serial Data (SDA) and Serial Clock (SCL). This simplicity drastically reduces the number of GPIO pins required on a microcontroller, simplifying board layout and lowering overall system cost. The device supports a 400 kHz (Fast-mode) bus, ensuring adequate data transfer speeds for most common use cases.

A key feature of this EEPROM is its 32-kilobit (4096 x 8) memory array, organized as 4096 bytes. This provides ample space for storing critical information that must be retained even when system power is removed. The memory is designed for high endurance, capable of supporting over 1 million write cycles, which is essential for applications involving frequent data updates. Furthermore, data retention is guaranteed for over 100 years, ensuring long-term reliability.

The AT24C32D-XHM-T incorporates advanced write-protection mechanisms. The entire memory array can be hardware write-protected by tying the WC (Write Control) pin to VCC, safeguarding stored data from accidental or malicious overwrites. The device also features a 64-byte page write buffer, enabling more efficient writing of sequential data blocks and reducing the total write time.

Housed in a space-saving 8-lead TSSOP package, this chip is well-suited for modern, compact electronics. Its wide voltage range (1.7V to 5.5V) allows it to operate seamlessly in both low-power and standard voltage systems, from battery-powered sensors to main-powered control units. Its extended temperature range ensures stable performance in demanding environments.

ICGOODFIND: The Microchip AT24C32D-XHM-T is a highly reliable and versatile serial EEPROM. Its combination of a standard I2C interface, substantial 32Kbit density, exceptional endurance, and robust data protection features makes it a superior choice for designers seeking a proven non-volatile memory solution for their next-generation electronic products.

Keywords:

I2C EEPROM

Non-Volatile Memory

32-Kbit

Microchip Technology

Serial Memory