Infineon Technologies S25FL256SAGBAEA00

Overview

S25FL256SAGBAEA00 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 (4 KB / 64 KB / 256 KB), and supports AutoBoot from preselected address on power-up or reset.

For engineers reviewing the S25FL256SAGBAEA00 datasheet, S25FL256SAGBAEA00 pinout, S25FL256SAGBAEA00 application, or S25FL256SAGBAEA00 equivalent, key selection criteria include military-grade temperature range, Quad DDR read throughput up to 80 MBps, OTP security (1024-byte array), programmable block protection, and compatibility with S25FL-P family footprints and command sets.

Technical Context

This device implements a SPI-MIO interface supporting clock polarity/phase modes 0 and 3, with configurable I/O voltage (1.65 V–3.6 V) independent from core supply (2.7 V–3.6 V). It integrates on-die ECC logic that automatically corrects single-bit errors during read operations and reports uncorrectable multi-bit errors via status register flags.

The memory array uses hybrid sector architecture-32 physical 4-KB sectors at top/bottom plus 64-KB sectors elsewhere-or uniform 256-KB logical sectors, enabling software compatibility across legacy and next-generation FL-S devices. Sector protection is enforced via status register bits, OTP lock bits, and Advanced Sector Protection (ASP) with password- or boot-code control.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (FAB024), 6 mm × 8 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 MX25L25673GM2I-12G and W25Q256JWSIQ, the S25FL256SAGBAEA00 uniquely delivers military temperature operation, on-die ECC, DDR read capability, AutoBoot, and robust sector-level security-making it the only option qualified for embedded defense systems requiring guaranteed data integrity under extreme environmental stress.

Availability

S25FL256SAGBAEA00 is available at Aetrix Electronics and suitable for aerospace avionics boot memory, military radar signal processing, tactical radio secure firmware, and missile guidance control storage requiring stable component supply across long production lifecycles and stringent environmental compliance.

Supply support for S25FL256SAGBAEA00 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, aerospace, and defense markets.

The FL-S family was engineered specifically for mission-critical embedded systems demanding extended temperature operation, hardware ECC, and seamless migration from prior S25FL generations-enabling drop-in replacement without firmware or PCB redesign.

FAQ

Does S25FL256SAGBAEA00 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 capacity. Address mode is selected via configuration register bit CR[3], and the default on power-up is 32-bit mode when the device detects a 32-bit command sequence.

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

VIO supplies power to all I/O buffers and determines logic threshold levels for SI, SO, WP#, and HOLD# pins. It may be tied to VCC only if the host system operates at the same voltage (2.7–3.6 V); for mixed-voltage systems (e.g., 1.8 V host), VIO must be independently supplied at 1.65–2.7 V to ensure signal integrity and avoid bus contention.

How does AutoBoot work, and can the boot address be changed in-field?

AutoBoot executes a preconfigured Normal or Quad Read command from a fixed address (0x000000 or 0x01000000) immediately after power-up or hardware reset. The boot address and command type are set via nonvolatile configuration register bits CR[1:0] and CR[2], which can be modified in-field using standard Write Enable and Write Status Register commands-no special unlock sequence required.

Is the 1024-byte OTP array one-time programmable only, or can it be erased?

The 1024-byte OTP array is permanently programmed using high-voltage pulses and cannot be electrically erased. Once a byte is written (from FFh to any other value), it remains immutable. This ensures cryptographic keys, calibration constants, or device identifiers remain tamper-proof throughout the product's lifetime-even under radiation or extreme temperature exposure.