Infineon Technologies S25FL256LDPNFI010

Overview

S25FL256LDPNFI010 from Infineon is a 256-Mbit serial NOR flash memory with Quad SPI interface, 133 MHz clock frequency, and 3.0 V supply voltage, used for code storage and execution in industrial microcontroller boot systems.

For engineers reviewing the S25FL256LDPNFI010 datasheet, S25FL256LDPNFI010 pinout, S25FL256LDPNFI010 application, or S25FL256LDPNFI010 equivalent, key selection criteria include read latency, sector protection granularity, write endurance, and XIP (execute-in-place) capability in embedded firmware storage designs.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with Quad I/O (QPI) mode supporting 4-bit data transfers per clock cycle. It features uniform 4-KB sectors and 64-KB blocks, with hardware write protection via WP# pin and software-controlled sector lockdown.

The memory supports both volatile and non-volatile configuration registers, enabling flexible read latencies (8–12 clock cycles), dummy cycle settings, and security lock bits. It operates across –40°C to +105°C industrial temperature range with 100,000 program/erase cycles endurance.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (300 mil, PN suffix), surface-mount, JEDEC-standard footprint with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256SDPNFI001, the S25FL256LDPNFI010 delivers 66% higher bandwidth via QPI and eliminates post-power-on configuration. Against MX25L25645GMI-10G, it adds extended temperature qualification, hardware security primitives, and persistent register settings-critical for certified industrial and automotive deployments.

Availability

S25FL256LDPNFI010 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging controllers, and smart grid communication devices requiring stable component supply and long-lifecycle support.

Supply support for S25FL256LDPNFI010 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 secure, fast, and temperature-robust code storage-designed specifically for boot-critical applications in safety- and uptime-sensitive environments.

FAQ

Does S25FL256LDPNFI010 support Execute-in-Place (XIP) operation?

Yes, it supports XIP mode via Quad SPI with configurable latency and dummy cycles. The device allows direct code execution from flash without copying to RAM, reducing boot time and SRAM usage in resource-constrained MCUs. XIP requires proper address mapping and cache coherency handling in the host processor.

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

HOLD# serves dual roles: as a transfer pause signal in SPI mode and as IO3 in Quad SPI mode. In QPI, it enables full 4-bit parallel data transfer, increasing throughput by 4× versus standard SPI. Its internal pull-down ensures safe default state during power-up or reset.

How does the non-volatile configuration register affect system startup?

The non-volatile configuration register stores QPI enable, latency, and security settings across power cycles. This eliminates the need for host firmware to reconfigure the flash at every boot, reducing boot latency and simplifying initialization code-especially valuable in safety-critical systems with strict startup timing budgets.

Can sector lockdown be reversed after activation?

No, sector lockdown is irreversible once committed via the appropriate command sequence. It permanently disables program/erase operations on selected sectors, providing tamper-proof protection for bootloader or calibration data. Lockdown status is retained through power cycles and cannot be cleared without full chip erase, which also removes all user data.