128 Mbit NOR Flash for automotive code storage
It stores firmware and calibration data in automotive ECUs, ADAS modules, and telematics units where non-volatile retention and fast read access are required. The SPI Quad I/O and QPI interface allows code shadowing or execute-in-place at up to 133 MHz, cutting the pin count compared to parallel NOR while keeping throughput high enough for most real-time boot sequences.
AEC-Q100 and the 85°C ceiling
It is not rated for under-hood or engine-bay environments where ambient can hit 125°C — for those, look at the FL-S series sibling S25FL128SAGBHM200, which carries the same density and interface but extends the temperature range to 125°C.