The AT93C66A-SQ-2.7 is a 4K-bit serial electrically erasable and programmable read-only memory (EEPROM) manufactured by Atmel (now Microchip Technology). It is organized as 256 words of 16 bits each (or 512 words of 8 bits). It's primarily used for storing small amounts of data, configuration settings, and other non-volatile information in a variety of applications.

Applications:

• Consumer electronics (TVs, set-top boxes, remote controls)
• Industrial control systems
• Automotive electronics
• Medical devices
• Instrumentation

Features:

• 4K-bit (512 x 8 or 256 x 16) EEPROM
• Serial interface (Microwire)
• Low-voltage operation (2.7V to 5.5V, specifically optimized for 2.7V operation)
• Self-timed write cycle
• High endurance (1,000,000 write cycles)
• Data retention (100 years)
• 8-lead SOIC package

Benefits:

• Non-volatile data storage
• Easy interface to microcontrollers and other systems
• Low power consumption
• High reliability and long-term data retention
• Compact size for embedded applications
• Suitable for low-voltage applications

Additional Details:

The AT93C66A-SQ-2.7 uses a Microwire serial interface for communication, which consists of three pins: a serial clock (SK), a data input (DI), and a data output (DO). The part is specifically designed for operation at 2.7V. The device features a self-timed write cycle, simplifying the write process. It guarantees a minimum of 1,000,000 write cycles and 100 years of data retention. It is commonly used for storing configuration data, user preferences, and calibration settings. This EEPROM is typically supplied in an 8-pin SOIC package. Its operating temperature range is -40°C to +85°C. The 2.7 in the part number signifies that the device is optimized for 2.7V operating voltage, but it still functions up to 5.5V.