Infineon Technologies S25FL256SAGMFMG00

Overview

S25FL256SAGMFMG00 from Infineon Technologies is a 256 Mb (32 MB) serial NOR flash memory with SPI Multi-I/O interface, designed for high-reliability military applications requiring extended temperature operation (-55°C to +125°C), hardware ECC, and dual/quad/DDR read modes. It features 65-nm MIRRORBIT™ Eclipse architecture, hybrid or uniform sector erase options, and supports 24-/32-bit addressing with AutoBoot capability at power-up.

For engineers reviewing the S25FL256SAGMFMG00 datasheet, S25FL256SAGMFMG00 pinout, S25FL256SAGMFMG00 application, or S25FL256SAGMFMG00 equivalent, key selection considerations include military-grade thermal endurance, Quad DDR read throughput up to 80 MBps, OTP security array, and compatibility with legacy S25FL-A/K/P families via shared command set and footprint.

Technical Context

This device implements a SPI-MIO (Multi-I/O) interface supporting standard, dual, quad, and DDR variants across SPI modes 0 and 3. Its internal architecture integrates hardware-based ECC generation and correction for single-bit errors during program/erase cycles, eliminating software overhead.

The flash supports two configurable erase topologies: hybrid (thirty-two 4-KB sectors plus 64-KB sectors) for backward compatibility with prior S25FL generations, and uniform (256-KB blocks only) for simplified software abstraction across higher-density devices.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (FAB024), 5 mm × 5 mm, Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256SAGMFMG00, the WSON variant trades mechanical ruggedness and thermal headroom for smaller footprint, while the Macronix alternative sacrifices DDR speed, voltage flexibility, and military qualification-making the Infineon FBGA part uniquely suited for high-assurance, thermally demanding deployments.

Availability

S25FL256SAGMFMG00 is available at Aetrix Electronics and suitable for avionics boot memory, tactical radio firmware storage, and guidance system configuration requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for S25FL256SAGMFMG00 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, automotive ICs, and high-reliability memory solutions for industrial and defense markets.

This device belongs to the FL-S family of SPI Multi-I/O NOR flash memories, engineered specifically for military, aerospace, and critical infrastructure applications demanding extended temperature operation, hardware ECC, and seamless migration from legacy S25FL generations.

FAQ

Does S25FL256SAGMFMG00 support both 24-bit and 32-bit addressing?

Yes. The device supports extended addressing modes: 24-bit addressing for compatibility with legacy 16 MB devices and 32-bit addressing to fully access its 32 MB capacity. Address mode is selected via configuration register bit CR[3], and the default on power-up is 24-bit for backward compatibility.

What is the purpose of the VIO pin, and can it be tied to VCC?

VIO supplies the I/O buffer circuitry independently from the core VCC rail. It may be tied to VCC when both rails operate within 2.7–3.6 V, but must be separately regulated at 1.65–2.7 V if interfacing with low-voltage controllers (e.g., 1.8 V FPGAs). Decoupling each rail improves signal integrity and noise immunity.

How does AutoBoot function, and can the boot address be changed?

AutoBoot executes a preconfigured read command (Normal or Quad) at a fixed address (0x000000 or 0x00000000) immediately after power-up or hardware reset. The boot address is hardwired and cannot be modified; however, the command type and latency are set via configuration register bits CR[1:0] and CR[2].

Is the 1024-byte OTP array one-time programmable per byte or per word?

The OTP array is organized as 1024 bytes of nonvolatile storage, programmed in 8-bit units. Once a bit is set to '0', it cannot be reverted to '1'. Programming is performed via standard SPI commands (0x42/0x4B), and the array remains locked after first write unless explicitly unlocked using the correct password sequence.