Infineon Technologies S25FL256SAGBHMC10

Overview

S25FL256SAGBHMC10 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 and secure firmware storage. It supports Quad, Dual, and DDR read modes up to 80 MHz (80 MBps Quad DDR), features hardware ECC, 1024-byte OTP, and hybrid/uniform sector erase options in a 24-ball FBGA package.

For engineers reviewing the S25FL256SAGBHMC10 datasheet, S25FL256SAGBHMC10 pinout, S25FL256SAGBHMC10 application, or S25FL256SAGBHMC10 equivalent, key selection criteria include military-grade (-55°C to +125°C) operation, 2.7–3.6 V core voltage with independent 1.65–3.6 V I/O supply, AutoBoot capability, CFI compliance, and support for both legacy S25FL-A/K/P footprints and advanced security features like Advanced Sector Protection.

Technical Context

This device implements a 65-nm MIRRORBIT™ Eclipse architecture with dual-voltage domain design: separate VCC (core) and VIO (I/O) supplies enable interoperability across mixed-voltage systems. Its SPI-MIO interface supports all four clock polarity/phase modes (0 and 3), plus DDR command execution with dedicated latency cycles for deterministic timing.

The memory array is organized with configurable sectoring - either hybrid (thirty-two 4-KB sectors + remaining 64-KB sectors) or uniform (256-KB logical blocks) - enabling backward compatibility with prior S25FL generations while supporting future density scaling. Internal hardware ECC provides single-bit error correction without host intervention during read operations.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (FAB024), 5 × 5 mm footprint, 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 S25FL256SAGBHMC10, the S25FL256SAGMFM10 offers identical functionality in a different package but sacrifices I/O voltage flexibility and thermal performance, while the MX25L25645GMI-10G omits critical military-grade features including DDR, hardware ECC, and Advanced Sector Protection - making it unsuitable for high-integrity firmware storage.

Availability

S25FL256SAGBHMC10 is available at Aetrix Electronics and suitable for aerospace avionics, military radar systems, and secure tactical radio platforms requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S25FL256SAGBHMC10 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 part belongs to the FL-S family of SPI Multi-I/O NOR flash devices, engineered specifically for military and aerospace applications demanding extended temperature operation, hardware-based security, and seamless migration from legacy S25FL-A/K/P platforms.

FAQ

Does S25FL256SAGBHMC10 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 the 32 MB memory space. Address mode is selected via configuration register bits and does not require external hardware changes.

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

VIO supplies power to the I/O buffer circuitry independently from the core VCC rail, enabling operation with I/O voltages as low as 1.65 V while maintaining full core functionality. It may be tied to VCC only if both rails operate within the overlapping 2.7–3.6 V range; otherwise, separate regulation is required to meet absolute maximum ratings.

How does AutoBoot function, and can the boot address be modified in-system?

AutoBoot executes a preconfigured Normal or Quad Read command at power-up or hardware reset using an address stored in a dedicated configuration register. That address is writable via standard SPI commands after device initialization, allowing field-upgradable boot locations without requiring mask ROM changes.

Is the 1024-byte OTP area one-time programmable in segments or only as a full block?

The OTP array consists of 32 individually lockable 32-byte sectors. Each sector can be permanently locked after programming, enabling incremental provisioning of keys, certificates, or calibration data without committing the entire 1024-byte space at once.