The AT24CM02-SSHM-B: A High-Density Solution for Serial Data Storage

In the realm of non-volatile memory, serial EEPROMs remain a cornerstone for storing critical configuration data, calibration constants, and event logs across a vast array of electronic systems. The AT24CM02-SSHM-B from Microchip Technology stands out as a robust and high-density solution in this category, offering 2 megabits (256 Kbytes) of reliable, byte-alterable memory.

This device is built on an advanced CMOS process, which is instrumental in achieving low power consumption—a critical factor for both battery-powered and energy-conscious applications. It supports a versatile 1.7V to 5.5V supply voltage range, ensuring compatibility with various logic levels and easing integration into new and legacy designs alike. The 'SSHM' suffix denotes that the chip is supplied in a 8-lead SOIC package, a common and industry-standard form factor suitable for automated assembly processes.

Communication is handled via a familiar and widely adopted I²C (Inter-Inter-Integrated Circuit) serial interface. This two-wire protocol minimizes the pin count required on the host microcontroller, preserving valuable GPIO for other functions. The AT24CM02-SSHM-B operates at clock frequencies of up to 1MHz (at 5V), facilitating high-speed data transfer. To address the entire 2-Mbit memory space, the chip incorporates an extended addressing scheme that uses two memory block bits. This allows a single device to be selected on the I²C bus, or up to four such devices can be connected on the same bus without address conflicts, enabling a combined storage of up to 8 megabits.

Data integrity is paramount, and this EEPROM is designed with a guaranteed 1-million write cycle endurance per byte and a data retention period of over 100 years. It also features a hardware write-protect pin that, when asserted, safeguards the entire memory array from accidental overwrites or erasures.

ICGOODFIND: The AT24CM02-SSHM-B is an exemplary serial EEPROM, delivering a potent combination of high density, low power operation, and proven reliability. Its industry-standard I²C interface and packaging make it an exceptionally accessible and flexible choice for designers seeking substantial non-volatile storage in consumer, industrial, and automotive applications.

Keywords:

1. Serial EEPROM

2. I²C Interface

3. Non-Volatile Memory

4. Low Power Consumption

5. High Density