It uses a 1.7 V to 2 V supply rail and communicates over SPI with Quad I/O and QPI support, clocking up to 133 MHz. The memory is organized as 64 M x 8 bits and comes in an 8-WSON package with an exposed pad (6 x 8 mm) for thermal management.
Package and mounting — 8-WSON with exposed pad
For hand-prototyping, a hot-air rework station with a fine nozzle works; a standard soldering iron will struggle with the pad. If you need a tube-packaged variant with a lower temperature grade (85°C), the S25FS512SAGNFI011 is the same die in the same package but rated to 85°C.