EEPROM Memory IC: Microchip AT24C02C-MAHM-T Datasheet and Application Overview
The Microchip AT24C02C-MAHM-T is a 2Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) organized internally as 256 words of 8 bits each. This device serves as a fundamental non-volatile memory solution for a vast array of applications, from consumer electronics to industrial systems, where reliable data storage beyond the power cycle is critical. Housed in a space-saving 8-lead TSSOP package, it is designed for low-power operation and high reliability.
Operating from a single 1.7V to 5.5V power supply, the AT24C02C offers exceptional flexibility, making it compatible with both modern low-voltage microcontrollers and legacy 5V systems. Its low standby current (6 µA, max) and active current (1 mA, max) are crucial for extending battery life in portable applications.
Communication is achieved via a Two-Wire Serial Interface (I²C-compatible), which requires only two bidirectional lines (Serial Data - SDA and Serial Clock - SCL) for efficient communication with a master device, such as a microcontroller. This protocol supports a clock frequency of up to 1MHz (at 5V), enabling high-speed read and write operations. The device also features hardware write-protection. When the WP (Write Protect) pin is tied to VCC, the entire memory array is protected from inadvertent write operations, safeguarding critical data.
The memory array is rated for endurance of 1,000,000 write cycles, significantly higher than early EEPROM generations, and offers a data retention period of 100 years. This ensures long-term data integrity and reliability. The AT24C02C also includes a page write capability of up to 16 bytes, allowing for more efficient data transfer by writing multiple bytes in a single operation, thus reducing protocol overhead.
Key Application Areas:
Consumer Electronics: Storing user settings, calibration data, and device parameters in smart TVs, set-top boxes, and audio equipment.
Industrial Systems: Data logging, storing sensor calibration constants, and maintaining configuration settings in PLCs, instrumentation, and control systems.
Automotive: Storing module configuration data in non-critical automotive electronic modules (note: specific automotive-grade variants exist for harsh environments).
Medical Devices: Retaining device settings and usage data in portable medical monitors and diagnostic equipment.
IoT and Smart Metering: Storing network parameters, metering data, and identification codes in smart sensors and meters.
ICGOODFIND: The Microchip AT24C02C-MAHM-T is a robust, versatile, and highly reliable EEPROM solution. Its combination of a wide voltage range, low power consumption, industry-standard I²C interface, and strong endurance makes it an excellent choice for designers seeking a proven non-volatile memory component for their next project.
Keywords: I²C Interface, Non-Volatile Memory, Low-Power Consumption, Data Retention, Write Protection.
