512 Mbit SPI NOR Flash for firmware storage and code shadowing
The S79FL512SDSMFVG03 is a 512 Mbit SPI NOR Flash memory from the FL-S series, organized as 64M x 8. It uses a Quad I/O interface to push read throughput beyond standard SPI, hitting an 80 MHz clock rate. The 2.7 V to 3.6 V supply range and -40°C to 105°C operating temperature make it a fit for industrial motor drives, outdoor telecom gear, and engine-bay electronics where firmware images need to survive vibration and heat. The 16-SOIC (7.50 mm width) package is a common footprint — no board respin if you are swapping in from a previous FL-S part.
80 MHz Quad I/O — real throughput for boot and OTA
At 80 MHz with Quad I/O, this part can sustain read throughput high enough to shadow a firmware image into RAM or execute-in-place (XIP) for smaller code footprints. The 512 Mbit density gives you room for a main firmware image plus a fallback recovery slot, which matters for field-upgradeable equipment where a bad OTA brick is not an option. The SPI - Quad I/O interface keeps pin count low — four data lines plus clock and chip select — so it fits on a 16-SOIC without crowding the board.
Active lifecycle, no LTB watch needed
This part carries an Active product status. That means no last-time-buy clock ticking, no end-of-life notice to file. For a BOM freeze or a new design, you can slot it in without worrying about a sudden discontinuation. The FL-S series is a current-generation NOR Flash family from the original manufacturer, so the datasheet and programming algorithms are stable. ROHS3 compliance covers the EU RoHS exemption list — no special handling for lead-free assembly.
Sourcing and supply posture
The S79FL512SDSMFVG03 is sourced through independent distribution and quoted to order against an RFQ. For volume production or a line-down replacement, submit an RFQ and we will come back with a firm price and delivery window.