Winbond Electronics Corporation W25Q128FVSIF TR

Overview

W25Q128FVSIF TR from Winbond is a 128M-bit (16MB) serial NOR flash memory supporting Standard/Dual/Quad SPI and QPI interfaces, operating at 2.7–3.6V with 104MHz max clock, 4KB uniform sector erase, and 1µA power-down current. It enables XIP code execution in embedded microcontrollers, firmware storage in industrial controllers, and parameter logging in IoT edge nodes.

For engineers reviewing the W25Q128FVSIF TR datasheet, W25Q128FVSIF TR pinout, W25Q128FVSIF TR application, or W25Q128FVSIF TR equivalent, key selection criteria include Quad I/O enable (QE bit), /HOLD vs /RESET pin behavior per package, 4KB sector granularity for data partitioning, and JEDEC SFDP register support for automatic configuration discovery.

Technical Context

The W25Q128FVSIF TR implements a flexible SPI-compatible interface with three operational modes: standard single-I/O (DI/DO), dual-I/O (IO0/IO1), and quad-I/O (IO0–IO3), enabled by the non-volatile QE bit in Status Register-2. Its architecture supports true execute-in-place (XIP) via Continuous Read Mode with ≤8-clock instruction overhead and wrap lengths of 8/16/32/64 bytes.

It features dual protection layers: hardware-level /WP and /HOLD pins (active-low, functional only in Standard/Dual SPI mode), and software-configurable memory protection via BP0–BP2, TB, SEC, CMP, and SRP bits in volatile/non-volatile status registers. The device includes three 256-byte OTP-lockable security registers and a factory-programmed 64-bit unique ID.

Key Specifications

Pinout & Package

W25Q128FVSIF TR uses an 8-pin SOIC 208-mil (Package Code S) with exposed pad, compliant with RoHS and halogen-free standards. Pin functions are shared across SPI modes: IO0–IO3 serve as DI/DO in standard mode and bidirectional data lines in dual/quad mode when QE=1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q128FVSIF TR, MX25L12833FZC-10G offers simpler command compatibility but sacrifices QPI efficiency and SFDP flexibility, while S25FL128SAGMFI001 delivers higher speed and ECC at the cost of full software/hardware ecosystem revalidation.

Availability

W25Q128FVSIF TR is available at Aetrix Electronics and suitable for industrial automation firmware storage, automotive ADAS boot loading, and medical device configuration archiving requiring stable component supply across extended product lifecycles.

Supply support for W25Q128FVSIF TR 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

Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including serial NOR/NAND flash, RAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.

The W25Q series was designed specifically for embedded systems requiring high-speed, low-power, and secure code/data storage with flexible interface options - targeting microcontroller-based applications where pin count and board space are constrained.

FAQ

What interface modes does the W25Q128FVSIF TR support, and how is Quad SPI enabled?

The W25Q128FVSIF TR supports Standard SPI, Dual SPI, Quad SPI, and QPI. Quad SPI is enabled by setting the Quad Enable (QE) bit in Status Register-2 (SR2). When QE = 1, the /WP and /HOLD pins become IO2 and IO3 respectively, enabling four-bit-wide data transfers. This configuration is non-volatile and persists across power cycles unless explicitly cleared.

Does the W25Q128FVSIF TR have a dedicated /RESET pin, and how does it behave in the 8-pin SOIC package?

The W25Q128FVSIF TR does not have a dedicated /RESET pin in its 8-pin SOIC 208-mil package (S-code). Pin 7 functions as /HOLD or /RESET depending on the HOLD/RST bit in Status Register-3 - but only when QE = 0. When QE = 1 (Quad SPI active), this pin becomes IO3 and neither /HOLD nor /RESET is available. For guaranteed /RESET functionality, Winbond recommends the 16-pin SOIC (F-code) variant.

How does the W25Q128FVSIF TR handle memory protection, and what combinations are possible?

The W25Q128FVSIF TR implements layered memory protection: hardware-level via /WP pin (active-low, protects status register writes), and software-configurable via status register bits (BP0–BP2, TB, SEC, CMP, SRP). These allow top/bottom array locking, complement protection, and individual sector/block lock/unlock. Protection granularity is 4KB sectors, and settings persist across power cycles when written non-volatilely.

What is the purpose of the SFDP register in the W25Q128FVSIF TR, and how is it accessed?

The SFDP (Serial Flash Discoverable Parameters) register in the W25Q128FVSIF TR provides a standardized, vendor-agnostic method for host MCUs to auto-detect flash geometry, timing parameters, and supported features at boot time. It is accessed via the Read SFDP Register instruction (5Ah) and resides at a fixed offset (0x000000), eliminating need for hard-coded timing tables in firmware.

Can the W25Q128FVSIF TR be used for Execute-in-Place (XIP), and what features enable it?

Yes, the W25Q128FVSIF TR supports true Execute-in-Place (XIP) via Continuous Read Mode with wrap lengths of 8/16/32/64 bytes and ≤8-clock instruction overhead. Combined with QPI mode (reducing command latency) and fast read speeds up to 416 MB/s effective throughput, it enables deterministic, low-latency code fetch directly from flash - outperforming parallel NOR in many embedded microcontroller applications.