Microchip 93AA66C-I/SN 7V 4Kbit Microwire Serial EEPROM for Data Storage Applications

The Microchip 93AA66C-I/SN is a 4-Kbit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) designed for reliable non-volatile data storage in a wide range of applications. Operating from a single power supply voltage from 2.5V to 7.0V, this device offers exceptional flexibility for both 5V and 3.3V systems, making it a versatile choice for modern and legacy designs alike.

Housed in a space-saving 8-lead SOIC (SN) package, this EEPROM is ideal for applications where board real estate is at a premium. It utilizes the simple and robust 3-wire Microwire serial interface, which requires only a Data In (DI), Data Out (DO), and Clock (SK) signal, in addition to a Chip Select (CS), for communication with a host microcontroller (MCU). This simplicity reduces the number of I/O pins required, simplifying board layout and firmware development.

The memory is organized as 512 x 8 or 256 x 16, providing design engineers with configuration options to match their specific data structure needs. It features a 16-byte page write mode that allows for more efficient programming of small data blocks, significantly speeding up the process compared to writing individual bytes. For reliability, the device includes built-in hardware write protection. When the Write-Protect (ORG) pin is held high, the entire memory array is protected from inadvertent writes, ensuring data integrity.

With an endurance of 1 million erase/write cycles and a data retention period of over 200 years, the 93AA66C is built for long-term performance. Its industrial temperature range (-40°C to +85°C) ensures stable operation in harsh environments. Common applications include storing calibration data, device configuration parameters, security codes, and transaction records in sectors such as automotive, industrial automation, consumer electronics, and smart meters.

ICGOOODFIND: The Microchip 93AA66C-I/SN stands out as a highly reliable, flexible, and easy-to-integrate non-volatile memory solution. Its wide voltage range, durable packaging, simple interface, and robust data retention specs make it an excellent choice for engineers seeking dependable data storage.

Keywords: Microwire Serial EEPROM, Non-volatile Memory, Data Storage, Wide Voltage Range, 8-lead SOIC.