Infineon Technologies S25FL256SAGBHEA00

Overview

S25FL256SAGBHEA00 from Infineon 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 supports hybrid or uniform sector erase, 256-byte or 512-byte page programming, and operates from 2.7 V to 3.6 V core supply with independent 1.65 V–3.6 V I/O voltage.

For engineers reviewing the S25FL256SAGBHEA00 datasheet, S25FL256SAGBHEA00 pinout, S25FL256SAGBHEA00 application, or S25FL256SAGBHEA00 equivalent, key selection criteria include military-grade temperature range, Quad DDR read throughput up to 80 MBps, OTP security features, hybrid sector architecture compatibility with legacy S25FL devices, and FBGA-24 (5×5 ball) packaging.

Technical Context

This device implements SPI Multi-I/O (SPI-MIO) with support for standard, dual, quad, and DDR command protocols across SPI modes 0 and 3. Its Eclipse architecture with 65-nm MIRRORBIT™ technology enables simultaneous read-while-write capability and deterministic latency via AutoBoot functionality at power-up or reset.

The flash integrates on-die ECC generation and correction for single-bit errors, configurable block protection via status register bits, and advanced sector protection (ASP) with password- or boot-code-controlled individual sector locking. It provides two physical sector configurations: hybrid (thirty-two 4-KB sectors + remaining 64-KB sectors) or uniform (256-KB logical blocks).

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 S25FL256SAGBHEA00, the S25FL256SAGNFA00 sacrifices environmental ruggedness for lower cost, while the MX25L25645GMI-10G lacks critical military-grade features-making the original part uniquely suited for high-assurance, thermally demanding deployments where deterministic boot, ECC, and secure sector control are mandatory.

Availability

S25FL256SAGBHEA00 is available at Aetrix Electronics and suitable for avionics flight control systems, tactical radio firmware storage, and missile guidance system boot memory requiring stable component supply across extended product lifecycles and defense procurement cycles.

Supply support for S25FL256SAGBHEA00 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.

The FL-S family targets military and aerospace applications demanding extended temperature operation, hardware ECC, and SPI Multi-I/O bandwidth scalability-designed specifically to replace legacy parallel NOR and earlier SPI flash in safety-critical boot and firmware storage roles.

FAQ

What is the maximum Quad DDR read throughput for S25FL256SAGBHEA00?

The device achieves 80 MBps Quad DDR read throughput at 80 MHz clock rate with VIO = VCC = 3.0 V to 3.6 V, as verified in Table 3 of the official datasheet. This performance assumes optimal PCB layout, proper termination, and host controller capable of DDR command sequencing and double-data-rate sampling.

Does S25FL256SAGBHEA00 support both 24-bit and 32-bit addressing?

Yes, it supports extended addressing modes: 24-bit for legacy compatibility (up to 16 MB) and 32-bit for full 32 MB access. Address mode is selected via configuration register bit CR[3], and the device automatically handles address translation based on instruction opcode and register setting.

How does the hybrid sector erase option improve compatibility with prior S25FL devices?

The hybrid option provides thirty-two 4-KB sectors at the top or bottom of the address space, matching the sector map of earlier S25FL-A/K/P families, while the rest are 64-KB sectors. This allows drop-in replacement in existing designs without modifying erase routines or partitioning logic in host firmware.

Can the 1024-byte OTP array be used for cryptographic key storage in secure boot implementations?

Yes-the OTP array is one-time programmable, non-volatile, and inaccessible to standard read commands unless explicitly enabled via status register. It is commonly used to store RSA/ECC private keys, boot hash digests, or device-unique identifiers in certified secure boot chains compliant with DO-178C or NSA Type 1 requirements.