The AT93C66-10TI-2.5 is a 4-Kbit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by Atmel (now Microchip Technology). It is designed for low-voltage applications, specifically operating at 2.5V. This EEPROM utilizes a 3-wire serial interface, providing a simple and efficient way to store non-volatile data. While listed as END-OF-LIFE, the AT93C66-10TI-2.5 was commonly used in applications requiring small amounts of persistent storage.

Applications

• Storing configuration parameters in electronic devices.
• Storing calibration data in sensors and instruments.
• Storing serial numbers and identification information.
• Storing user preferences in consumer electronics.
• Data logging in low-power systems.

Features

• 4-Kbit (512 x 8 or 256 x 16) EEPROM.
• Low-voltage operation (2.5V).
• 3-wire serial interface.
• Self-timed write cycle.
• High reliability with 1,000,000 erase/write cycles.
• Data retention of 100 years.
• Write protect feature to prevent accidental data corruption.

Benefits

• Non-volatile memory ensures data is retained even when power is removed.
• Low-voltage operation is ideal for battery-powered and low-power applications.
• Simple 3-wire interface simplifies integration with microcontrollers.
• Self-timed write cycle reduces software overhead.
• High reliability ensures data integrity over long-term use.
• Write protect provides added security against data loss.

Additional Details

The AT93C66-10TI-2.5 offers flexibility in memory organization, allowing it to be configured as either 512 x 8 or 256 x 16 bits via an external ORG pin. It features a self-timed write cycle, meaning that the microcontroller doesn't need to manage the timing of the write operation. This simplifies the programming process. As an end-of-life component, newer designs should consider alternative EEPROM solutions. However, it may still be necessary for maintaining older systems. Detailed technical specifications are available in the device datasheet from Microchip Technology, including timing diagrams, electrical characteristics, and package information.