64 Mbit NOR flash in a 6×8 BGA — the availability picture
The S25FL164K0XBHVS30 is an Infineon FL1-K series 64 Mbit SPI NOR flash organized as 8M × 8 bits, clocked at 108 MHz over a Quad I/O interface.
Obsolete — what that means for your BOM line
For a production line that already qualifies this 24-BGA footprint and the Quad I/O interface, securing remaining stock or an approved second-source variant should be the priority before the surplus channel dries up.
Quad I/O throughput and write-cycle budgeting
Page write cycle time is 3 ms typical — a full 64 Mbit firmware image written in 256-byte pages would take roughly 100 seconds at that rate, so field-update windows need to account for the erase-before-write overhead of NOR flash.