Winbond Electronics Corporation W25Q128JVSJQ

Overview

W25Q128JVSJQ from Winbond is a 128M-bit (16MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces for embedded code storage and XIP execution. It operates from 2.7V to 3.6V, delivers up to 133MHz SPI clock rate (532MHz equivalent Quad I/O), features 4KB uniform sectors, and supports hardware write protection via /WP and /HOLD pins. It is used in industrial microcontroller boot code storage requiring high reliability and low-power operation.

For engineers reviewing the W25Q128JVSJQ datasheet, W25Q128JVSJQ pinout, W25Q128JVSJQ application, or W25Q128JVSJQ equivalent, key selection criteria include Quad SPI timing compliance, 4KB sector erase granularity, JEDEC ID/SFDP register support, 100K program-erase cycle endurance, and -40°C to +105°C industrial-plus temperature grade.

Technical Context

The W25Q128JVSJQ implements a SPI-compatible command set with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where Quad mode requires non-volatile QE bit (Status Register-2, bit 1) to be set. Its internal architecture includes a 256-byte page buffer, sector/block erase logic, and three 256-byte security registers with OTP lock capability.

It integrates volatile and non-volatile status/configuration registers controlling block protection (BP2–BP0, TB, SEC, CMP), driver strength (DRV1/DRV0), and erase/program suspend/resume functionality. The /RESET pin is not present on the SOIC 208-mil package (S-code), confirming W25Q128JVSJQ uses the 8-pin SOIC 208-mil package without dedicated reset.

Key Specifications

Pinout & Package

W25Q128JVSJQ uses the 8-pin SOIC 208-mil package (Package Code S), with no /RESET pin. All signals are edge-triggered and fully compliant with SPI Mode 0 and Mode 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZNI-10G and S25FL128SAGMFI000, W25Q128JVSJQ provides superior Quad SPI throughput, integrated SFDP for plug-and-play host initialization, and 4KB sector flexibility-making it optimal for XIP-based embedded designs where firmware agility and thermal robustness are critical.

Availability

W25Q128JVSJQ is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and smart energy meter firmware requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for W25Q128JVSJQ 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 industrial, automotive, and consumer markets.

The W25Q series was designed to deliver high-performance, pin-compatible serial NOR flash with enhanced security, flexible erase architecture, and multi-SPI protocol support for resource-constrained embedded systems.

FAQ

What is the package type and pin count of W25Q128JVSJQ?

W25Q128JVSJQ uses an 8-pin SOIC 208-mil package (Package Code S) with standard SPI pinout: /CS, DO, /WP, GND, DI, CLK, /HOLD, and VCC. It does not include a dedicated /RESET pin, distinguishing it from SOIC-16 or TFBGA variants of the W25Q128JV family. This package is optimized for space-constrained PCB layouts while maintaining full Quad SPI functionality when the QE bit is enabled.

Does W25Q128JVSJQ support Quad SPI operation out of the box?

No - W25Q128JVSJQ requires the non-volatile Quad Enable (QE) bit in Status Register-2 to be set (bit 1 = 1) to activate Quad SPI mode. Until configured, IO2 (/WP) and IO3 (/HOLD) remain in hardware protection/hold function. The QE bit can be written via Write Status Register-2 (31h) instruction after issuing Write Enable (06h). Once set, /WP and /HOLD become IO2 and IO3 respectively, enabling full Quad I/O operation.

What is the maximum guaranteed erase/program endurance for W25Q128JVSJQ?

W25Q128JVSJQ guarantees a minimum of 100,000 program/erase cycles per 4KB sector, validated across its full -40°C to +105°C industrial-plus operating range. This endurance rating applies to all sectors and is specified under standard 2.7–3.6 V supply conditions. Endurance is unaffected by use of Dual or Quad SPI modes, and wear leveling must be implemented in firmware or host controller logic.

How does hardware write protection work on W25Q128JVSJQ?

Hardware write protection on W25Q128JVSJQ is implemented via the active-low /WP pin, which - when held low - prevents writes to the Status Register regardless of software commands. Combined with Status Register bits (BP2–BP0, TB, SEC, CMP), it allows locking of individual 4KB sectors or contiguous memory regions. Protection remains active even during power cycling, provided /WP is asserted at power-up and maintained during operation.

Is W25Q128JVSJQ compatible with JEDEC-standard SFDP and unique ID reading?

Yes - W25Q128JVSJQ fully supports JEDEC JESD216B SFDP (Serial Flash Discoverable Parameters) via Read SFDP Register (5Ah) instruction, enabling automatic host configuration of timing and feature sets. It also provides a factory-programmed 64-bit Unique ID accessible via Read Unique ID Number (4Bh), supporting device authentication and secure provisioning workflows in production and field service.