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Infineon Technologies S25FS256SDSNFI001 — Logic ICs

Cypress S25FS256SDSNFI001 256Mbit NOR Flash

MPNS25FS256SDSNFI001
End of Life

Cypress FS-S series S25FS256SDSNFI001, 256Mbit FLASH - NOR, SPI - Quad I/O, QPI interface, 80 MHz clock, 1.7V ~ 2V supply, -40°C ~ 85°C, 8-WSON (6x8) package.

$5.53Ref. price · indicative, final on quote
Infineon Technologies S25FS256SDSNFI001 datasheet (PDF)
Packaging8-WDFN Exposed Pad
RoHSROHS3 Compliant
SeriesFS-S
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

S25FS256SDSNFI001 specifications
ParameterValue
SeriesFS-S
Memory typeNon-Volatile
MountingSurface Mount
Supply voltage1.7V ~ 2V
Clock frequency80 MHz
Memory interfaceSPI - Quad I/O, QPI
Operating temperature-40°C ~ 85°C (TA)
PackageTube
TechnologyFLASH - NOR
Memory size256Mbit
Memory formatFLASH
Case8-WDFN Exposed Pad
Memory organization32M x 8

Product details

The S25FS256SDSNFI001: It supports SPI with Quad I/O and QPI protocol at an 80 MHz clock rate.

80 MHz SPI clock — what it buys the firmware engineer

The 80 MHz clock frequency is the maximum SPI clock the device supports. In Quad I/O mode, each clock edge transfers four bits.

1.7 V to 2 V supply — a narrow rail that demands attention

The 1.7 V minimum is low enough to ride through a battery discharge curve on a single Li-ion cell near end-of-life, but the 2 V ceiling means you cannot run it from a 2.5 V or 3.3 V supply without a regulator. If your board already has a 1.8 V rail, this part drops in without an extra LDO.

Package and thermal: 8-WSON with exposed pad

Skipping the via stitch or leaving the pad floating will raise the junction temperature under sustained quad-read operation, especially at 85°C ambient.

Cypress (now Infineon) continues to manufacture the FS-S series. The ROHS3 compliance is confirmed.

Frequently asked questions

Does S25FS256SDSNFI001 support Quad SPI?

Yes. The memory interface includes SPI - Quad I/O and QPI modes. Quad I/O uses four data lines for reads and writes, and QPI extends quad operation to the command phase for reduced overhead.

What is the equivalent part for S25FS256SDSNFI001?

The closest functional peer in the same Cypress FS-S family is the S25FS512SAGNFI011, which doubles the density to 512 Mbit and raises the clock to 133 MHz. It shares the same 1.7 V supply range, SPI Quad I/O interface, and 8-WSON package footprint.