Infineon Technologies S25FL128SAGBAEA03

Overview

S25FL128SAGBAEA03 from Infineon is a 128 Mb (16 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 256-byte or 512-byte page programming, hybrid or uniform sector erase options, and 100 program-erase cycles endurance.

For engineers reviewing the S25FL128SAGBAEA03 datasheet, S25FL128SAGBAEA03 pinout, S25FL128SAGBAEA03 application, or S25FL128SAGBAEA03 equivalent, key selection criteria include military-grade temperature range, Quad DDR read support up to 80 MBps, OTP security array, and compatibility with S25FL-A/K/P families via shared command set and footprint.

Technical Context

This device implements Infineon's 65-nm MIRRORBIT™ Eclipse architecture with separate core (2.7–3.6 V) and I/O (1.65–3.6 V) supply domains. It supports SPI clock modes 0 and 3, extended 24-/32-bit addressing, and AutoBoot functionality that executes preconfigured Normal or Quad Read at power-up or reset.

The flash integrates hardware-based single-bit error correction (ECC), configurable block protection via status register bits, and Advanced Sector Protection (ASP) enabling password- or boot-code-controlled individual sector locking. Its logic block includes dedicated command decode, address latch, and multi-I/O data path optimized for simultaneous dual/quad lane transfers.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (FAB024), 6 × 8 mm, Pb-free. Compatible with standard reflow profiles for high-reliability assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128SAGBAEA03, the industrial S25FL128SAGBHI00 omits military temp rating and OTP security, while the Macronix MX25L12833FZNI-10G sacrifices DDR performance, ECC, and temperature resilience - making neither suitable as drop-in replacements in defense-critical designs.

Availability

S25FL128SAGBAEA03 is available at Aetrix Electronics and suitable for avionics flight control, tactical radio firmware, and missile guidance systems requiring stable component supply across extended product lifecycles and defense procurement cycles.

Supply support for S25FL128SAGBAEA03 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 and aerospace applications demanding extended temperature operation, hardware ECC, and secure firmware storage.

FAQ

Does S25FL128SAGBAEA03 support both 24-bit and 32-bit addressing?

Yes, it supports extended addressing modes: 24-bit addressing for compatibility with legacy S25FL-A/K devices and 32-bit addressing for future-proof access to full 128 Mb capacity without bank switching. The addressing mode is selected via configuration register bit CR[2].

What is the purpose of the VIO supply pin, and can it operate independently from VCC?

VIO powers the I/O buffer circuitry and can be set independently from VCC within 1.65–3.6 V, enabling direct interface with 1.8 V FPGAs or 3.3 V microcontrollers without external level shifters. Core logic remains powered by VCC (2.7–3.6 V), ensuring stable internal operation regardless of I/O voltage.

How does AutoBoot function, and can the startup read address be modified?

AutoBoot executes a preconfigured Normal or Quad Read command automatically after power-up or hardware reset. The target address is stored in a dedicated configuration register (CR[15:0]) and can be programmed once during initial setup - it cannot be altered in-field without issuing an erase command to the configuration sector.

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

The OTP array is organized as 1024 individually addressable bytes, each programmable only once. Programming is performed via standard SPI commands (0x4B) with address and data payload; no block erase is required, and verification is done per-byte using status register polling.