Infineon Technologies S25FS128SAGMFV103

Overview

S25FS128SAGMFV103 from Infineon is a 128 Mbit (16 MB) serial NOR flash memory with SPI Multi-I/O interface, operating at 1.8 V supply, supporting Quad I/O and DDR Quad I/O read modes up to 80 MBps, featuring 65-nm MIRRORBIT™ Eclipse architecture, 100,000 program-erase cycles, and industrial temperature range (–40°C to +85°C), used for firmware storage in embedded microcontrollers and boot code execution in industrial gateways.

For engineers reviewing the S25FS128SAGMFV103 datasheet, S25FS128SAGMFV103 pinout, S25FS128SAGMFV103 application, or S25FS128SAGMFV103 equivalent, key selection criteria include hybrid/uniform sector erase options, internal ECC support, SFDP/CFI compliance, OTP array size, and WSON 6 × 5 mm package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a SPI-MIO interface with full command subset compatibility across Infineon's S25FL-P/S25FL-S families, supporting both standard SPI clock modes (0 and 3) and DDR operation. It integrates hardware-based ECC for single-bit error correction and supports burst wrap, continuous XIP, and QPI read modes for deterministic latency in real-time systems.

The memory array uses hybrid sector architecture - eight 4-KB sectors plus one 32-KB sector at top/bottom address space, with remaining sectors at 64 KB - enabling flexible firmware partitioning. Erase and program suspend/resume functions allow concurrent background operations without interrupting host CPU execution.

Key Specifications

Pinout & Package

Package: WSON 6 × 5 mm, 8-pin, Pb-free, with exposed thermal pad (pin 8 = VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FS128SAGMFV103, the Cypress alternative offers identical functionality at lower temperature grade, while the Winbond part trades DDR performance and advanced command features for broader ecosystem driver support and lower unit cost.

Availability

S25FS128SAGMFV103 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging devices, and smart grid communication systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for S25FS128SAGMFV103 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, sensing, and memory solutions for industrial, automotive, and IoT applications.

The S25FS-S family targets high-reliability embedded systems requiring fast, secure, and configurable non-volatile storage with robust data integrity mechanisms and extended temperature resilience.

FAQ

What is the maximum clock frequency supported in DDR Quad I/O mode?

The S25FS128SAGMFV103 supports DDR Quad I/O read operations at up to 80 MHz clock frequency, delivering 80 MBps effective throughput. This is specified in the AC characteristics section of the datasheet (Rev. *O, Table 6.5), and requires proper impedance-controlled PCB routing and matched trace lengths for all four I/O lines.

Does this device support hardware write protection without software commands?

Yes - the WP# pin provides hardware-based write protection that disables all program and erase commands when asserted low. This function operates independently of status register settings and remains active even during power transitions, making it suitable for fail-safe boot protection in safety-critical systems.

How is the 1024-byte OTP array accessed and programmed?

The OTP array is accessed via dedicated JEDEC-standard One-Time Program commands (0x4B and 0x42). Programming requires issuing Write Enable, then OTP Program, followed by verification using OTP Read (0x48). Once locked, the OTP region cannot be reprogrammed, and its contents persist through power cycles and temperature extremes.

Can the device operate in standard SPI mode without enabling Multi-I/O features?

Yes - the S25FS128SAGMFV103 defaults to standard SPI mode (single I/O) on power-up. All basic read, program, and erase commands function without configuring the Enhanced Volatile Configuration Register (EVCR). Multi-I/O modes must be explicitly enabled via status register writes, preserving backward compatibility with legacy SPI controllers.