Winbond Electronics Corporation W25Q128FVPJQ

Overview

W25Q128FVPJQ from Winbond is a 128M-bit (16MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, operating at up to 104MHz clock frequency with 4KB uniform sector erase granularity, 2.7–3.6V single supply, and -40°C to +85°C industrial temperature range. It enables code execution directly from flash (XIP), parameter storage, and firmware updates in space-constrained embedded systems.

For engineers reviewing the W25Q128FVPJQ datasheet, W25Q128FVPJQ pinout, W25Q128FVPJQ application, or W25Q128FVPJQ equivalent, key selection considerations include Quad Enable (QE) bit configuration for IO2/IO3 remapping, /HOLD vs /RESET functionality per package variant, 4KB sector flexibility for data logging, and JEDEC SFDP register support for auto-configuration.

Technical Context

The W25Q128FVPJQ implements a flexible SPI-compatible memory architecture with three operational modes: Standard SPI (4-wire), Dual I/O SPI (2-data-line), and Quad I/O SPI/QPI (4-data-line). Its internal status registers (SR1/SR2/SR3) control volatile/non-volatile write protection, sector locking, output drive strength (DRV1/DRV0), and HOLD/RESET pin function selection via the HOLD/RST bit.

It supports true execute-in-place (XIP) via Continuous Read Mode with ≤8-clock instruction overhead and wrap lengths of 8/16/32/64 bytes. Erase/program suspend-resume capability allows background operations without interrupting active reads, and the 64-bit unique ID plus three 256-byte security registers enable secure boot and device authentication.

Key Specifications

Pinout & Package

W25Q128FVPJQ uses an 8-pin WSON 6×5-mm package (Package Code P), with exposed pad for thermal dissipation and footprint compatibility across Winbond's W25Q family. Pin 1 is /CS; pins 2–3 and 5–7 are bidirectional I/Os configurable for SPI/Dual/Quad operation; pin 4 is GND; pin 8 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZNI-08G and S25FL128SAGMFI000, W25Q128FVPJQ provides unique QPI mode for reduced instruction overhead, integrated /HOLD for SPI bus sharing, and standardized SFDP for plug-and-play controller compatibility - making it optimal for cost-sensitive, multi-vendor embedded designs requiring XIP and field update resilience.

Availability

W25Q128FVPJQ is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot memory, and medical IoT sensor data logging requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for W25Q128FVPJQ 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 DRAM, mobile DRAM, and serial flash memory solutions for consumer, industrial, and automotive markets.

The W25Q series was designed specifically for embedded systems requiring high-speed, low-power, and secure code/data storage with flexible interface options - targeting applications where PCB space, pin count, and firmware update reliability are critical constraints.

FAQ

What interface modes does the W25Q128FVPJQ support, and how is Quad SPI enabled?

The W25Q128FVPJQ supports Standard SPI, Dual I/O SPI, Quad I/O SPI, and QPI. Quad SPI is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 using instruction 31h. When QE=1, pins /WP and /HOLD become IO2 and IO3 respectively, enabling four data lines. The W25Q128FVPJQ datasheet specifies that QE must be set before issuing Quad SPI commands like 6Bh (Fast Read Quad I/O) or 32h (Quad Input Page Program).

How does the W25Q128FVPJQ handle power-down and wake-up sequences?

The W25Q128FVPJQ enters ultra-low-power mode (<1 µA typical) via the Power-down instruction (B9h). Wake-up is triggered by the Release Power-down instruction (ABh) or by toggling /CS from high to low. During wake-up, the device requires a tPUR (power-up ready) delay of up to 3 µs before accepting new commands. The W25Q128FVPJQ maintains all status register settings across power-down cycles unless explicitly modified.

Can the W25Q128FVPJQ's /HOLD pin be used as /RESET, and under what conditions?

Yes - in the 8-pin WSON package (like W25Q128FVPJQ), pin 7 (/HOLD or /RESET) functions as /HOLD when the HOLD/RST bit in Status Register-3 is 0, and as /RESET when that bit is 1. This configuration is volatile and resets on power-up. The W25Q128FVPJQ does not support simultaneous /HOLD and /RESET operation in this package; dedicated /RESET is only available on the 16-pin SOIC variant (Package Code F).

What is the purpose of the SFDP register in the W25Q128FVPJQ, and how is it accessed?

The SFDP (Serial Flash Discoverable Parameters) register is a standardized, read-only 256-byte table (accessed via instruction 5Ah) that describes timing parameters, erase block sizes, and feature support. It allows host controllers to auto-configure drivers without hard-coded values. The W25Q128FVPJQ implements JEDEC JESD216B-compliant SFDP, enabling interoperability across flash vendors and simplifying firmware portability - a key advantage over non-SFDP alternatives.

How does the W25Q128FVPJQ implement hardware write protection, and what happens when QE=1?

Hardware write protection on the W25Q128FVPJQ is implemented via the /WP pin (active-low), which disables writes to the status register when asserted. However, when QE=1 (Quad SPI enabled), the /WP pin is remapped to IO2 and loses its hardware protection function. In that case, write protection relies entirely on software-configured status register bits (BP0–BP2, TB, SEC, CMP, SRP0/SRP1). The W25Q128FVPJQ datasheet confirms this behavior in Section 4.3 and Table 7.1.11.