Infineon Technologies S25FL256LAGNFN011

Overview

S25FL256LAGNFN011 from Cypress Semiconductor is a 256 Mbit (32 Mbyte) 3.0 V serial NOR flash memory with SPI Multi-I/O interface, supporting SDR/DDR Quad I/O and QPI modes, 4KB uniform sector erase, 100,000 program-erase cycles, and industrial temperature range (–40°C to +85°C). It serves as non-volatile code storage in embedded boot systems requiring XIP or fast shadowing.

For engineers reviewing the S25FL256LAGNFN011 datasheet, S25FL256LAGNFN011 pinout, S25FL256LAGNFN011 application, or S25FL256LAGNFN011 equivalent, key selection criteria include quad-read throughput (66 MB/s), SFDP support for auto-configuration, security region protection, erase suspend/resume capability, and WSON-8 package compatibility with legacy FL-S/FL-P footprints.

Technical Context

This device implements a 65 nm floating gate architecture with a 256-byte page programming buffer and hierarchical erase granularity: 4KB sectors, 32KB half-blocks, and 64KB blocks. It supports JEDEC JESD216B SFDP for runtime parameter discovery and configurable protection via status/configuration registers.

The SPI-MIO interface enables mode-selectable operation: standard SPI (SIO), dual I/O (DIO), quad I/O (QIO), and quad peripheral interface (QPI), with DDR read commands doubling data transfer per clock edge. Reset and write protect functions are multiplexed onto IO3 and IO2 pins under configuration register control.

Key Specifications

Pinout & Package

Package: 8-pin WSON (6 mm × 8 mm, 0.5 mm pitch), Pb-free, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FL256LAGNFN011, the FL-S alternative trades bandwidth and configurability for maturity and cost, while the Macronix part offers competitive pricing but omits DDR, QPI, and hardware-enforced security regions-critical for secure boot and field updates.

Availability

S25FL256LAGNFN011 is available at Aetrix Electronics and suitable for industrial HMIs, automotive ADAS modules, medical firmware storage, and embedded boot systems requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for S25FL256LAGNFN011 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

Cypress Semiconductor, now part of Infineon Technologies, designs high-performance memory and programmable solutions for industrial, automotive, and IoT applications.

The FL-L family targets space-constrained embedded systems needing high-speed serial flash with robust security, flexible erase architecture, and seamless migration from prior Cypress SPI flash generations.

FAQ

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

The S25FL256LAGNFN011 supports DDR Quad I/O at up to 66 MHz, delivering 66 MB/s effective read throughput. This is confirmed in the Performance Summary table on page 2 of the official datasheet (Document Number 002-00124 Rev. *A), where DDR Quad Read is specified at 66 MHz with 66 MBps bandwidth.

Does this device support hardware reset via the IO3 pin?

Yes - IO3 functions as RESET# when Configuration Register-2 bit CR2V[7] = 1 and the device is not in Quad-I/O mode (CR1V[1] = 0), or when in Quad mode with CS# high. The internal pull-up resistor allows unconnected use unless hardware reset functionality is required.

How many security regions does the S25FL256LAGNFN011 provide, and what is their size?

The device provides four dedicated security regions, each 256 bytes in size, located outside the main flash array. These regions support independent volatile/non-volatile locking, password protection, and permanent lockdown - documented in Section 8.1 and Table 8-1 of the datasheet.

Is the WSON-8 package of S25FL256LAGNFN011 footprint-compatible with earlier Cypress SPI flash devices?

Yes - it shares the same WSON-8 (6 × 8 mm) footprint and pinout as S25FL1-K, S25FL-P, and S25FL-S family members. Migration notes in Section 1.2.1 confirm command subset and physical compatibility, enabling drop-in replacement in existing PCB layouts.