Infineon Technologies S25FL128LAGMFM003

Overview

S25FL128LAGMFM003 from Infineon is a 128-Mbit serial NOR flash memory with quad SPI interface, 3.0 V supply voltage, and 100 MHz clock frequency. It supports XIP (execute-in-place), dual/quad I/O modes, and offers 100,000 program/erase cycles with 20-year data retention.

For engineers reviewing the S25FL128LAGMFM003 datasheet, S25FL128LAGMFM003 pinout, S25FL128LAGMFM003 application, or S25FL128LAGMFM003 equivalent, key selection criteria include quad SPI timing compliance, sector protection granularity, erase suspend/resume capability, and industrial temperature range operation.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended quad I/O commands compliant with JEDEC JESD216B. It uses a 64-Mbit × 2 stacked-die architecture to achieve 128 Mbit density in an 8-pin SOIC package.

Internal architecture includes a 256-byte page buffer, uniform 4-KB sectors, and a 64-KB block structure. Command execution supports fast read at 100 MHz with 8- or 16-bit dummy cycles depending on mode.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), 208-mil width, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL128LAGMFM003, the Cypress alternative provides seamless drop-in compatibility, while the Winbond part trades suspend functionality for broader distributor availability-making it viable only in non-real-time firmware storage roles.

Availability

S25FL128LAGMFM003 is available at Aetrix Electronics and suitable for industrial control, automotive ADAS, medical imaging, and networking equipment requiring stable component supply and long-lifecycle support.

Supply support for S25FL128LAGMFM003 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, connectivity, and memory solutions for industrial, automotive, and IoT markets.

This device belongs to the S25FL family of high-reliability serial NOR flash memories designed specifically for mission-critical embedded boot and firmware storage in harsh environments.

FAQ

Is S25FL128LAGMFM003 compatible with standard SPI controllers?

Yes, it supports standard SPI mode (single I/O) as well as dual and quad I/O modes. All command sets comply with JEDEC JESD216B, and initialization uses standard SPI opcodes before enabling enhanced modes. No proprietary controller is required.

What is the minimum erase block size supported?

The smallest erasable unit is a 4-KB sector. The device supports uniform sector erase, 64-KB block erase, and chip erase. Sector-level granularity enables fine-grained firmware updates without disturbing adjacent code or configuration data.

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

Yes, S25FL128LAGMFM003 supports true XIP mode via quad SPI interface. The memory array is directly mapped into processor address space using memory-mapped I/O, enabling CPU instruction fetch without copying to RAM.

How is hardware write protection implemented?

Hardware write protection is controlled by the /WP pin (Pin 3). When held low, it prevents all program and erase operations regardless of status register settings. This complements software-based sector protection for defense-in-depth firmware security.