Nexperia USA Inc. S25FL256SDSMFBG00

Overview

S25FL256SDSMFBG00 from Cypress Semiconductor (now Infineon) is a 256-Mbit serial NOR flash memory with quad SPI interface, 133 MHz clock frequency, and 3.0–3.6 V supply voltage. It supports XIP (execute-in-place), uniform 4-KB sectors, and hardware reset protection, deployed in industrial PLC firmware storage and automotive infotainment boot code retention.

For engineers reviewing the S25FL256SDSMFBG00 datasheet, S25FL256SDSMFBG00 pinout, S25FL256SDSMFBG00 application, or S25FL256SDSMFBG00 equivalent, key selection criteria include sector erase granularity, write cycle endurance (100K cycles), data retention (20 years), and quad I/O timing compliance per JESD216 Rev B.

Technical Context

This device implements a standard Serial Peripheral Interface (SPI) with extended quad I/O (QPI) mode for high-throughput read operations. It uses a 65 nm process technology and integrates a 256-bit page buffer for accelerated program operations.

Internal architecture includes a dedicated command decoder, status register with write protection bits (SRWD, BP0–BP3), and volatile/non-volatile configuration registers supporting dual/quad I/O enable, latency tuning, and deep power-down entry.

Key Specifications

Pinout & Package

16-pin Small Outline Integrated Circuit (SOIC) package, 300-mil body width, gull-wing leads, RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25645GMI-10G and W25Q256JWSIQ, S25FL256SDSMFBG00 uniquely provides both quad I/O performance and independent VIO for flexible voltage domain interfacing-critical for heterogeneous SoC designs with legacy 1.8 V peripherals and 3.3 V power rails.

Availability

S25FL256SDSMFBG00 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot code, and medical diagnostic imaging UI requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for S25FL256SDSMFBG00 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 acquired Cypress Semiconductor in 2020 and maintains its broad portfolio of high-reliability non-volatile memory solutions for industrial and automotive markets.

The S25FL family targets mission-critical embedded applications demanding guaranteed data retention, robust write protection, and deterministic boot performance under harsh environmental conditions.

FAQ

Does S25FL256SDSMFBG00 support execute-in-place (XIP) operation?

Yes. The device supports true XIP mode via quad SPI interface, allowing microcontrollers to fetch and execute instructions directly from flash without copying to RAM. This reduces boot latency and eliminates SRAM footprint overhead in resource-constrained systems.

What is the minimum pulse width requirement for the RESET# signal?

The RESET# pin requires a minimum active-low pulse width of 20 ns to guarantee proper internal state initialization. Longer pulses (>100 ns) are recommended for robustness in noisy industrial environments with EFT or surge coupling.

Can VIO and VCC be supplied from the same 3.3 V rail?

Yes. VIO may be tied directly to VCC when only 3.3 V I/O logic is used. However, separating VIO enables interoperability with 1.8 V host processors while maintaining 3.3 V core operation-verified in Infineon's AN98564 application note.

Is hardware write protection enabled by default after power-on?

No. Hardware write protection is disabled by default. The status register write protection bit (SRWD) and block protection bits (BP0–BP3) must be explicitly programmed via WRSR command. Default state allows full read/write access until configured.