128 Mbit NOR Flash for code shadowing and XIP
The S25FL128LAGBHI023: SPI interface with Quad I/O and QPI support, clocked at 133 MHz. 128Mbit non-volatile flash for firmware or XIP code.
At 133 MHz in Quad I/O mode, the part can deliver around 66 MB/s sustained read throughput (133 MHz × 4 bits per cycle). That is fast enough to support XIP from flash without a separate RAM shadow, cutting BOM cost and board space. If your MCU or SoC has a Quad SPI controller, this part lets you boot directly from flash and run code with minimal wait states.
Supply and logic compatibility
The supply range of 2.7V to 3.6V means it works cleanly on a 3.3V rail, with enough headroom to ride through dips to 2.7V. All I/O are 3.3V-tolerant, so it mates directly with 3.3V MCUs and FPGAs without level shifters. No 1.8V variant here — this is strictly a 3.3V part.
It comes in a 24-ball TBGA (8 mm × 6 mm body, 0.8 mm ball pitch). That is a fine-pitch BGA — not something you swap in the field without a hot-air station and some practice. The package is surface-mount only; no socketed option exists. If you are planning a field-upgrade path, consider a footprint for a socket or a second-sourced QFP variant from the same family.