AT25640B-SSHL-T – ATMEL

The AT25640B-SSHL-T is a 64-kilobit (8K x 8) serial EEPROM utilizing a standard Serial Peripheral Interface (SPI). It operates at a maximum clock frequency of 20 MHz, supporting SPI modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1). The device features low-voltage operation, with a specified voltage range typically between 1.8V and 5.5V, dependent on temperature and process variation. Memory organization consists of 8192 bytes, accessible via byte, page (up to 64 bytes), or sequential read/write operations. The SSHL suffix denotes a specific temperature range, typically -40°C to +85°C, and lead-free SOIC-8 (Small Outline Integrated Circuit) package. The ‘T’ at the end of the part number indicates tape and reel packaging for automated assembly processes. Write protection features include a software write protect instruction and a hardware write protect pin (WP) to prevent accidental data corruption.