64 Mbit NOR Flash with 108 MHz Quad SPI — what you are getting
The Cypress S25FL164K0XBHI030 is a 64 Mbit NOR Flash memory organized as 8M × 8 bits, using the FL1-K series architecture. The part comes in a 24-ball TBGA package (6 mm × 8 mm body), surface-mount only.
At 108 MHz in Quad I/O mode, each clock cycle transfers four bits, so the raw read throughput hits about 54 MB/s. That is enough to feed a moderate Cortex-M class MCU without wait states for XIP, or to stream firmware update data quickly. The 3 ms page write time (word/page) is typical for this NOR generation — fine for configuration storage, not for high-frequency logging.
If this is on your BOM, you are looking at last-time-buy inventory or new-old-stock.
24-TBGA footprint — layout and handling
The 24-ball BGA with a 6 mm × 8 mm body is a fine-pitch array — expect 0.8 mm ball pitch typical for this class. No exposed pad, so thermal dissipation is through the balls and PCB copper.