Winbond Electronics Corporation W25Q128FVFJQ

Overview

W25Q128FVFJQ 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 sectors, and hardware write protection via /WP and /HOLD pins. It enables XIP execution in embedded boot code storage, firmware update storage, and parameter retention in industrial controllers.

For engineers reviewing the W25Q128FVFJQ datasheet, W25Q128FVFJQ pinout, W25Q128FVFJQ application, or W25Q128FVFJQ equivalent, key selection criteria include Quad I/O timing compliance, 4KB sector erase granularity, /RESET pin availability in 16-pin SOIC variants, and JEDEC SFDP register support for auto-configuration.

Technical Context

The W25Q128FVFJQ implements a flexible SPI-compatible interface architecture with configurable I/O modes: Standard (4-pin), Dual (5-pin), Quad (6-pin), and QPI (6-pin with reduced instruction overhead). Its status register includes non-volatile Quad Enable (QE), Block Protect (BP2–BP0), and HOLD/RST function select bits that determine whether pin 7 operates as /HOLD or /RESET.

It supports concurrent erase/program suspend-resume operations, programmable output drive strength (DRV1/DRV0), and three 256-byte security registers with OTP lock capability. Memory organization comprises 65,536 × 256-byte pages across 4,096 erasable 4KB sectors, enabling fine-grained data partitioning without requiring full-chip erases.

Key Specifications

Pinout & Package

W25Q128FVFJQ uses an 8-pin SOIC 208-mil package (Package Code S), with pin 1 = /CS, pin 2 = DO (IO1), pin 3 = /WP (IO2), pin 4 = GND, pin 5 = DI (IO0), pin 6 = CLK, pin 7 = /HOLD or /RESET (IO3), pin 8 = VCC. Pin 7's function is software-configurable via Status Register bit HOLD/RST when QE=0; it defaults to /HOLD and becomes /RESET only when explicitly enabled.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZNI-10G, W25Q128FVFJQ adds QPI mode for lower instruction overhead and configurable /HOLD or /RESET on pin 7; compared with S25FL128SAGMFI000, it retains 8-pin compatibility and SPI-only simplicity but trades peak clock speed for broader ecosystem support.

Availability

W25Q128FVFJQ is available at Aetrix Electronics and suitable for boot code storage, firmware update storage, and calibration data retention requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.

Supply support for W25Q128FVFJQ 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, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The W25Q series targets embedded systems requiring high-speed, low-pin-count non-volatile storage-designed specifically for code execution, firmware updates, and secure parameter retention in resource-constrained MCUs.

FAQ

What interface protocols does the W25Q128FVFJQ support?

The W25Q128FVFJQ supports Standard SPI, Dual SPI, Quad SPI, and Quad Peripheral Interface (QPI) protocols. QPI mode eliminates opcode bytes and reduces instruction overhead, enabling faster burst reads than standard Quad SPI. All modes operate up to 104 MHz clock frequency, with Quad I/O achieving up to 416 MHz effective throughput. The W25Q128FVFJQ requires the Quad Enable (QE) bit in Status Register-2 to be set to activate IO2 and IO3 pins for Quad operation.

Does the W25Q128FVFJQ have a dedicated /RESET pin?

No-the W25Q128FVFJQ in its 8-pin SOIC package (FJQ suffix) does not have a dedicated /RESET pin. Pin 7 functions as either /HOLD or /RESET depending on the HOLD/RST bit setting in the status register, but only when Quad Enable (QE) = 0. When QE = 1, pin 7 becomes IO3 and neither /HOLD nor /RESET is available. For designs requiring hardware reset, the 16-pin SOIC variant (e.g., W25Q128FVFIG) provides a dedicated /RESET pin.

How is write protection implemented on the W25Q128FVFJQ?

W25Q128FVFJQ implements dual-layer write protection: hardware-level via the /WP pin (active-low, disables status register writes), and software-level via status register bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1). These bits allow selective locking of 4KB sectors, top/bottom array regions, or the entire memory. The /WP pin is disabled when QE = 1 (Quad mode active), as pin 3 becomes IO2. Protection settings persist across power cycles when written to non-volatile bits.

What is the sector erase size and total number of sectors in the W25Q128FVFJQ?

The W25Q128FVFJQ features uniform 4KB sectors, totaling 4,096 erasable sectors. It also supports larger erase blocks: 32KB (128 sectors) and 64KB (256 sectors), plus full-chip erase. This granularity enables efficient firmware updates-only modified modules need erasing, preserving adjacent calibration data or boot code. Each sector can be individually locked/unlocked via status register bits or security registers.

Does the W25Q128FVFJQ support unique device identification?

Yes-the W25Q128FVFJQ includes a factory-programmed, read-only 64-bit Unique ID Number accessible via instruction 4Bh. This ID is globally unique per device and supports secure provisioning, anti-counterfeiting, and traceability in production. It is independent of the JEDEC Manufacturer ID (9Fh) and SFDP register, providing a deterministic hardware fingerprint for firmware binding or license enforcement.