256 Mbit NOR flash for firmware and parameter storage
The Infineon S25FL256SAGMFIR00 is a 256 Mbit FL-S series NOR flash organized as 32M x 8 bits, accessed over an SPI bus with Quad I/O support at up to 133 MHz. The 133 MHz clock rate with Quad I/O yields a sustained read throughput that keeps a Cortex-M or RISC-V core fed during XIP (eXecute-In-Place) operation — the limiting factor is the flash array access time, not the bus itself. The 2.7 V to 3.6 V supply range matches the common 3.3 V I/O rail on most MCUs and SoCs, but the lower end at 2.7 V means it can ride through a brown-out condition on a 3.3 V rail without losing data integrity — the read path remains valid down to the minimum operating voltage.
Package footprint and PCB integration
Housed in a 16-SOIC wide-body package (7.50 mm body width), this flash uses the standard JEDEC SOIC-16W footprint — the 1.27 mm pin pitch is hand-solderable and routes easily on a two-layer board, unlike fine-pitch BGA or QFN alternatives that require micro-vias. The wide-body package also dissipates heat better than the narrow SOIC variant under sustained read bursts. The industrial temperature rating of -40°C to +85°C covers the majority of factory-floor, outdoor telecom, and automotive cabin applications. For engine-bay or under-hood duty where ambient exceeds 85°C, the S25FL256SAGMFV000 or S25FL256SAGMFVG00 siblings extend the range to 105°C while keeping the same pinout and command set — a drop-in swap on the same PCB layout.
Active lifecycle and procurement posture
The S25FL256SAGMFIR00 carries an active lifecycle status from Infineon — no last-time-buy or end-of-life notice is in effect, so it remains suitable for both new designs and ongoing production builds. ROHS3 compliance means no substance exemptions to track for EU or UKCA markets. No stock-holding claim is made; the part is quoted to order per the BOM quantity.