Quad I/O means the data bus operates on four I/O lines during reads and writes, delivering higher throughput than standard SPI — useful for holding firmware images or configuration data that the host MCU fetches directly from flash. The 24-TBGA package (8 x 6 mm) is a fine-pitch BGA footprint, so the PCB layout needs the correct solder-mask and via pattern for that ball array.
Cypress (now part of Infineon) no longer manufactures the S25FL132K0XBHV020 in its original production line. Any available units are sourced through independent distribution — surplus inventory, NOS (new old stock), or broker-sourced material that has already been manufactured and sat in inventory. The 24-TBGA package is a moisture-sensitive BGA, so verify the date code and moisture-barrier bag seal before reflow.
The 105 °C ceiling means the part can sit next to a processor or regulator that pushes the local board temperature, as long as the junction stays within that limit. At the cold end, -40 °C covers winter start-up in unheated enclosures.
Page write timing and firmware update planning
That is a typical NOR flash figure — fast enough for OTA staging or parameter storage, but not a speed leader. When sizing the firmware update window, budget for the page-erase time (not listed here but typical 30-60 ms per 4 KB sector) plus the 3 ms per page write. For a 32 Mbit device, a full-chip rewrite takes on the order of seconds, not milliseconds.