Infineon Technologies S25FS256SAGMFM003

Overview

S25FS256SAGMFM003 from Infineon is a 256 Mb (32 MB) serial NOR flash memory IC with SPI Multi-I/O interface, 1.8 V supply, and industrial temperature grade (–40°C to +85°C). It supports Quad I/O, DDR Quad I/O read up to 80 MBps, 256/512-byte page programming, hardware ECC, and hybrid/uniform sector erase options. Used for firmware storage in embedded controllers requiring XIP execution and secure boot.

For engineers reviewing the S25FS256SAGMFM003 datasheet, S25FS256SAGMFM003 pinout, S25FS256SAGMFM003 application, or S25FS256SAGMFM003 equivalent, key selection criteria include DDR Quad I/O bandwidth, 100K program-erase cycles, OTP array size, AEC-Q100 grade compatibility, and BGA-24 package footprint alignment with layout constraints.

Technical Context

This device implements Infineon's Eclipse architecture with 65-nm MIRRORBIT™ technology, enabling high-density NOR flash with deterministic timing and robust data retention. It supports both SDR and DDR SPI protocols across clock modes 0 and 3, with configurable 24-/32-bit addressing and SFDP/CFI for auto-configuration.

The flash integrates dual-sector erase architectures: hybrid (eight 4-KB + one 32-KB or 224-KB sectors) and uniform (64-KB or 256-KB blocks), plus programmable block protection via status register bits and advanced sector protection with password-controlled access to OTP and boot sectors.

Key Specifications

Pinout & Package

Package: BGA-24, 6 mm × 8 mm, FAB024 5×5 ball footprint (Pb-free).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash applications.

Compared with S25FS256SAGNFM003 and W25Q256JWSIQ, the S25FS256SAGMFM003 uniquely delivers DDR Quad I/O bandwidth, on-die ECC, and password-enforced sector protection in a thermally enhanced BGA-24 package-critical for safety-certified and high-throughput embedded systems.

Availability

S25FS256SAGMFM003 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, networking equipment, and medical imaging systems requiring stable component supply and long-lifecycle support.

Supply support for S25FS256SAGMFM003 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, sensing, and memory solutions for industrial, automotive, and IoT applications.

The FS-S Flash family targets high-reliability embedded systems needing deterministic boot, secure firmware storage, and scalable density-designed specifically for AEC-Q100-compliant automotive ECUs and industrial controllers demanding 20-year data retention.

FAQ

What is the maximum DDR Quad I/O read speed supported by S25FS256SAGMFM003?

The device achieves 80 MBps DDR Quad I/O read throughput at 80 MHz clock frequency, verified per Infineon datasheet Rev. *O Section 3 (Performance Summary). This speed assumes proper signal integrity, matched trace lengths, and termination per the BGA-24 layout recommendations in Section 7.3.

Does S25FS256SAGMFM003 support 32-bit addressing for >16 MB memory maps?

Yes, it supports extended 32-bit addressing mode, enabling full access to its 256 Mb address space without bank switching. This is enabled via the Extended Address Register (EAR) and documented in Section 8.1 (Address Space Maps) and Command 0x15 (Enter 4-Byte Address Mode).

How is the 1024-byte OTP array protected against accidental programming?

The OTP region is write-protected by default and requires two-step unlocking: first issuing Write Enable (0x06), then executing the One-Time Program command (0x42) with correct address and data. Once programmed, bits cannot be reset; verification is performed automatically during write completion.

Can S25FS256SAGMFM003 operate in standard SPI mode without using Quad or DDR features?

Yes, it fully supports legacy SPI mode (single I/O, SDR) with commands like Read (0x03) and Fast Read (0x0B) at up to 133 MHz. All Multi-I/O and DDR functionality is optional and disabled by default; configuration is done via Status and Configuration Registers per Section 6.4 and 6.5.