Infineon Technologies S25FL256LDPNFM010

Overview

S25FL256LDPNFM010 from Infineon Technologies is a 256-Mbit serial NOR flash memory with quad SPI interface, 1.8 V supply voltage, 133 MHz read clock frequency, and uniform 256-byte programmable sectors. It serves as nonvolatile code/data storage in boot memory applications for microcontrollers in industrial control systems.

For engineers reviewing the S25FL256LDPNFM010 datasheet, S25FL256LDPNFM010 pinout, S25FL256LDPNFM010 application, or S25FL256LDPNFM010 equivalent, key selection criteria include sector architecture compatibility, quad I/O timing compliance, 1.8 V VCC tolerance, and JEDEC-standard SFDP support for configuration auto-detection.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended quad I/O (QPI) mode supporting single/dual/quad I/O read and program operations. It features a 4-byte address space, configurable write protection via status registers, and hardware reset capability through the RESET# pin.

The memory array is organized into 512 uniform sectors of 256 KB each, with erase granularity down to sector level. It supports both volatile and nonvolatile status register writes, and includes a 64-bit unique ID for device identification.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (300 mil, PN suffix), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256SAGMFV000 and W25Q256JWSIQ, the S25FL256LDPNFM010 uniquely combines 1.8 V operation, QPI interface, hardware RESET#, and 64-bit unique ID-enabling secure, low-voltage, high-speed boot in space-constrained industrial and automotive edge nodes.

Availability

S25FL256LDPNFM010 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging devices, automotive ADAS modules, and smart grid gateways requiring stable component supply and long-term manufacturability.

Supply support for S25FL256LDPNFM010 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, sensor, and memory solutions for industrial, automotive, and IoT applications.

The S25FL family targets high-reliability embedded systems requiring fast, secure, and long-life nonvolatile storage-designed specifically for boot code execution, firmware updates, and configuration retention in harsh environments.

FAQ

Does S25FL256LDPNFM010 support execute-in-place (XIP) operation?

Yes. The device supports XIP mode via its quad SPI interface, allowing microcontrollers to execute code directly from flash without copying to RAM. Its 133 MHz read clock and uniform sector layout ensure predictable instruction fetch timing, validated for ARM Cortex-M and RISC-V cores with SPI memory-mapped peripherals.

What is the purpose of the HOLD# pin beyond pausing transfers?

The HOLD# pin also functions as IO3 in quad I/O mode, enabling full 4-bit parallel data transfer. When asserted during active communication, it freezes internal address counters and I/O states without deselecting the chip-critical for interrupt-driven systems where SPI bus arbitration must preserve transaction context across MCU interrupts.

How does the 64-bit unique ID enhance security in firmware updates?

The factory-programmed 64-bit ID is read-only and cannot be altered. It enables asymmetric key binding during secure boot: the bootloader verifies firmware signatures using a public key tied to this ID, preventing cloned or tampered images from executing-even if flash contents are copied to another unit. This meets IEC 62443-3-3 SL2 requirements.

Is sector protection retained after power loss?

Yes. Sector protection settings are stored in nonvolatile status registers and persist across power cycles. Protection is enforced at the hardware level upon power-up, preventing accidental writes to locked sectors before firmware initialization-eliminating reliance on software-based lock enforcement that could fail during brownout or reset conditions.