Winbond Electronics Corporation W25Q128BVFJG

Overview

W25Q128BVFJG from Winbond is a 128M-bit (16MB) serial NOR flash memory with Dual/Quad SPI interface, organized into 65,536 pages of 256 bytes each and supporting 4KB sector, 32KB block, 64KB block, and chip erase. It operates from 2.7V to 3.6V, draws 4mA active current and <1µA in power-down mode, and delivers up to 35MB/s continuous read throughput via Fast Read Quad I/O (EBh). It is used for code storage, XIP execution, and firmware updates in embedded microcontrollers and IoT edge devices.

For engineers reviewing the W25Q128BVFJG datasheet, W25Q128BVFJG pinout, W25Q128BVFJG application, or W25Q128BVFJG equivalent, key selection criteria include Quad SPI timing compliance (70MHz clock, 280MHz equivalent), hardware write protection via /WP and /HOLD pins, JEDEC ID and SFDP register support, 4KB sector granularity, and compatibility with standard, dual, and quad SPI instruction sets including EBh, 6Bh, and BBh.

Technical Context

The W25Q128BVFJG implements a SPI command-and-control logic architecture with dedicated page buffer, status register management (SR1/SR2), and high-voltage generators for erase/program operations. It supports SPI modes 0 and 3, with configurable Quad Enable (QE) bit in Status Register-2 required to activate IO2 (/WP) and IO3 (/HOLD) for Quad I/O instructions.

Its flexible erase hierarchy includes uniform 4KB sectors (4,096 total), 32KB blocks (2,048), and 64KB blocks (256), enabling precise data partitioning. Erase/program suspend/resume capability allows background operation interruption without data loss - critical for real-time firmware update scenarios where host CPU must service interrupts mid-operation.

Key Specifications

Pinout & Package

W25Q128BVFJG is packaged in an 8-pad WSON 8×6 mm (Package Code E), with exposed pad for thermal dissipation and space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZC-10G and S25FL128SAGMFI000, the W25Q128BVFJG uniquely balances Quad SPI performance, 4KB sector flexibility, SFDP runtime configurability, and integrated security registers - making it optimal for cost-sensitive yet feature-rich embedded systems requiring field-upgradable firmware and tamper-resistant data storage.

Availability

W25Q128BVFJG is available at Aetrix Electronics and suitable for firmware storage, secure OTA updates, and industrial HMI display memory requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for W25Q128BVFJG 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 manufacturer specializing in specialty memory solutions, including serial flash, PSRAM, and mobile DRAM, serving industrial, communications, and consumer markets since 1987.

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

FAQ

What is the package type and pin count of the W25Q128BVFJG?

The W25Q128BVFJG uses an 8-pad WSON 8×6 mm package (Package Code E) with pins: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD (IO3), and VCC. This compact footprint supports high-density PCB layouts and eliminates lead-free soldering concerns associated with SOIC or BGA variants.

Does the W25Q128BVFJG support execute-in-place (XIP) operation?

Yes, the W25Q128BVFJG supports true XIP via Continuous Read Mode with as few as 8 clocks of instruction overhead per 24-bit address. When used with Fast Read Quad I/O (EBh) at 70 MHz, it delivers up to 35 MB/s sustained throughput - sufficient for direct execution of ARM Thumb-2 or RISC-V code without RAM copying.

How is Quad SPI mode enabled on the W25Q128BVFJG?

Quad SPI mode is enabled by setting the Quad Enable (QE) bit in Status Register-2 using the Write Status Register (01h) instruction. Once QE = 1, the /WP and /HOLD pins become IO2 and IO3 respectively; standard SPI and Dual SPI functions are disabled until QE is cleared.

What write protection mechanisms does the W25Q128BVFJG provide?

The W25Q128BVFJG offers layered write protection: hardware-level via active-low /WP pin, software-level via Block Protect (BP2–BP0), Top/Bottom (TB), and Security Register Lock (LB1–LB3) bits, and volatile/non-volatile status register locking via SRP0/SRP1. These can be combined to protect individual 4KB sectors or the entire array.

Is the W25Q128BVFJG compatible with JEDEC-standard identification protocols?

Yes, the W25Q128BVFJG supports JEDEC-standard Manufacturer and Device ID (90h/92h/94h), JEDEC ID (9Fh), and SFDP Register (5Ah) read commands. Its 64-bit Unique ID (4Bh) and SFDP table enable automated bootloader configuration and vendor-agnostic flash initialization.