Infineon Technologies S25FL128LAGMFB003

Overview

S25FL128LAGMFB003 from Infineon is a 128-Mbit serial NOR flash memory with Quad SPI interface, 3.0–3.6 V supply, 100 MHz clock frequency, and 133 MHz equivalent read speed in x4 mode. It operates across industrial temperature range (−40°C to +85°C) and supports sector erase, block erase, and chip erase for firmware storage in microcontroller-based edge nodes.

For engineers reviewing the S25FL128LAGMFB003 datasheet, S25FL128LAGMFB003 pinout, S25FL128LAGMFB003 application, or S25FL128LAGMFB003 equivalent, key selection criteria include Quad SPI timing compliance, erase granularity (4 KB sectors), write protection flexibility (hardware WP# and software status register lock), and JEDEC JESD216B SFDP support for auto-configuration.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended Quad I/O (QPI) mode enabling four-bit data transfers per clock cycle. It uses a 64-Mbit × 2 die architecture with uniform 4 KB sectors and supports both volatile and non-volatile status register writes.

The memory array is organized as 256 pages per sector, 512 sectors total, with configurable write protection covering top/bottom 64 KB blocks and individual sectors via status register bits SRWD, BP0–BP3. Erase suspend/resume and deep power-down modes are supported.

Key Specifications

Pinout & Package

8-pin SOIC (208 mil) package with standard SPI pinout and dedicated Write Protect (WP#) and Hold (HOLD#) control inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128SAGMFI001, this part omits OTP security but guarantees full SFDP v1.6 support and industrial temp grade; versus MX25L12833FZNI-10G, it delivers 33% higher read bandwidth and eliminates manual timing register setup.

Availability

S25FL128LAGMFB003 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device firmware storage requiring stable component supply and long-term lifecycle assurance.

Supply support for S25FL128LAGMFB003 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 AG is a German semiconductor manufacturer specializing in power management, sensing, and connectivity solutions for industrial, automotive, and IoT markets.

This part belongs to the S25FL Serial Flash family, designed specifically for high-reliability embedded systems needing fast, secure, and standards-compliant non-volatile code and data storage.

FAQ

Is S25FL128LAGMFB003 compatible with standard SPI controllers?

Yes - it supports standard SPI mode (single I/O) as well as Dual and Quad I/O modes. Standard SPI operation uses SI, SO, SCLK, and CS# pins with command set compliant with JEDEC JESD216. No special controller IP is required for basic read/write/erase functions.

What is the maximum clock frequency for Quad SPI mode?

The maximum clock frequency for Quad SPI mode is 100 MHz. At this rate, with four data bits per clock cycle, the effective read throughput reaches 133 MHz equivalent, delivering up to 532 MB/s theoretical bandwidth under ideal conditions.

Does this device support execute-in-place (XIP) operation?

Yes - the device supports XIP via continuous read mode with wrap-around addressing. Host processors with QSPI peripherals (e.g., ARM Cortex-M7/M33, RISC-V SoCs) can directly fetch instructions from flash memory without copying to RAM first.

How is write protection implemented on this part?

Write protection is implemented through both hardware and software methods: the WP# pin provides physical lockout of status register and memory writes when asserted low, while software-controlled BP0–BP3 bits in the status register allow selective locking of top/bottom 64 KB blocks and individual 4 KB sectors.