The S25FL132K0XNFV041: The 4M x 8 organization (32 Mbit) stores firmware and a small file system.
The 108 MHz Quad I/O read clock gives a sustained throughput that can keep an MCU's execute-in-place (XIP) path fed without wait-state penalties, as long as the host controller supports Quad SPI. At that speed, the 3 ms page write time is typical for NOR — the bottleneck is the erase cycle, not the program pulse. If your application logs data frequently, budget for the sector-erase latency; this part is optimized for code storage, not high-cycle EEPROM replacement.
The S25FL132K0XNFV041 is listed as Obsolete. When buying for a production BOM, verify date-code freshness and request a PCN trace from the seller; independent stock can still be genuine if pulled from a last-time-buy lot. For new designs, look at the current-generation FL1-K family variants or a drop-in compatible Quad SPI NOR from another vendor — the 8-USON (4x4 mm) footprint is not unique to Cypress, but pin compatibility needs a cross-reference check against the target datasheet.