Infineon Technologies S25FS256SAGMFI000

Overview

S25FS256SAGMFI000 from Infineon is a 256 Mb (32 MB) serial NOR flash memory with SPI Multi-I/O interface, operating at 1.8 V supply. It supports Quad I/O and DDR Quad I/O read modes up to 80 MBps, features hardware ECC for single-bit error correction, and offers hybrid or uniform sector erase options including 4-KB, 64-KB, and 256-KB sectors. Used in boot code storage for industrial microcontrollers requiring fast XIP execution.

For engineers reviewing the S25FS256SAGMFI000 datasheet, S25FS256SAGMFI000 pinout, S25FS256SAGMFI000 application, or S25FS256SAGMFI000 equivalent, key selection criteria include 1.8 V operation, AEC-Q100 Grade 2 qualification (–40°C to +105°C), BGA-24 FAB024/FAC024 footprint compatibility, SFDP/CFI support, and OTP array security.

Technical Context

This device implements Infineon's Eclipse architecture with 65-nm MIRRORBIT™ technology, enabling high-density nonvolatile storage with deterministic timing. It supports both standard SPI (modes 0/3) and enhanced Multi-I/O protocols including QPI mode, with configurable 24-/32-bit addressing for flexible memory mapping.

The embedded algorithm handles page programming (256/512-byte buffers), erase suspend/resume, and automatic ECC generation during program/erase cycles. Security is enforced via status register-based block protection, advanced sector protection (ASP) with password control, and a dedicated 1024-byte one-time programmable (OTP) array.

Key Specifications

Pinout & Package

Package: BGA-24, 6 × 8 mm footprint with either FAB024 (5 × 5 ball array) or FAC024 (4 × 6 ball array) configuration. Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FS256SAGMFI000, the Cypress variant trades package flexibility for identical performance and qualification, while the Winbond part sacrifices DDR bandwidth, security features, and automotive reliability to reduce unit cost by ~18%.

Availability

S25FS256SAGMFI000 is available at Aetrix Electronics and suitable for automotive ADAS ECUs, industrial PLCs, medical imaging BIOS, and smart grid RTUs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S25FS256SAGMFI000 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, sensor, and memory solutions for automotive, industrial, and IoT markets.

The FS-S Flash family targets high-reliability embedded systems needing secure, fast, and endurance-optimized serial NOR flash - specifically designed for automotive boot storage, industrial firmware, and safety-critical firmware updates.

FAQ

What is the maximum clock frequency supported in DDR Quad I/O mode?

The S25FS256SAGMFI000 supports DDR Quad I/O operation at up to 80 MHz clock frequency, delivering 80 MBps effective read throughput. This is specified in the AC characteristics section (Rev. *O, Table 6.5) and validated across the full –40°C to +105°C temperature range with 1.8 V ±5% supply.

Does this device support 32-bit addressing for memory spaces larger than 16 MB?

Yes, the device supports extended 32-bit addressing via the 4-byte address instruction set, enabling full access to its 32 MB capacity without bank switching. This is implemented per JEDEC JESD216B and confirmed in Section 8.1 (Address Space Maps) and Table 10.4 (Read Memory Array commands).

How is the OTP array protected from accidental overwrite?

The 1024-byte OTP array is write-protected by default after power-on and requires explicit unlock via the Write Enable command followed by the Program OTP command. Once programmed, individual bytes cannot be erased or rewritten - verified in Section 10.7 and Section 9.1 of the datasheet.

Can the device operate in standard SPI mode without enabling Multi-I/O features?

Yes, the device is fully backward-compatible with legacy SPI controllers using only IO0 and IO1 pins in standard single-data-rate mode. All basic commands (Read, Page Program, Sector Erase) function identically to S25FL-A/K/P families, as stated in the Features section on page 1 and migration notes in Section 1.2.