Winbond Electronics Corporation W25Q64FVSFJQ

Overview

W25Q64FVSFJQ from Winbond is a 64M-bit (8MB) serial NOR flash memory IC designed for code storage and XIP execution in space-constrained embedded systems. It supports Standard/Dual/Quad SPI and QPI interfaces, operates from 2.7V–3.6V, delivers up to 104MHz SPI clock rate (416MHz equivalent in Quad I/O), and features 4KB uniform sectors, 20-year data retention, and hardware write protection via /WP and /HOLD pins. It is commonly used in microcontroller boot code storage and firmware update storage.

For engineers reviewing the W25Q64FVSFJQ datasheet, W25Q64FVSFJQ pinout, W25Q64FVSFJQ application, or W25Q64FVSFJQ equivalent, key selection criteria include Quad SPI timing compliance, sector-erase flexibility for OTA updates, JEDEC ID and SFDP register support for auto-configuration, and compatibility with 3.3V I/O microcontrollers requiring low-power active and deep power-down modes.

Technical Context

The W25Q64FVSFJQ implements a flexible SPI command architecture supporting four operational modes: Standard (4-wire), Dual I/O (2-wire bidirectional), Quad I/O (4-wire bidirectional), and QPI (4-wire with 2-cycle instruction encoding). Its internal block diagram includes a 256-byte page buffer, sector/block erase logic, status register control (with QE bit enabling Quad mode), and security registers with OTP locks.

Hardware control signals (/CS, /WP, /HOLD) operate independently of interface mode - but /WP and /HOLD are repurposed as IO2 and IO3 when Quad Enable (QE=1) is set in Status Register-2. The device uses a single power supply and supports continuous read with wrap (8/16/32/64-byte), enabling true execute-in-place (XIP) operation without external buffering.

Key Specifications

Pinout & Package

W25Q64FVSFJQ is packaged in an 8-pin SOIC 300-mil (package code SF), with pin 1 assigned to /HOLD (IO3), pin 7 to /CS, and pins 8–16 including 8 NC terminals. This wide-body SOIC variant provides mechanical robustness and hand-soldering compatibility for prototyping and low-volume production.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L6433FZNI-10G and S25FL164K0XMFI010, the W25Q64FVSFJQ offers superior configurability via SFDP and deterministic low-latency XIP via QPI, while maintaining pin-compatible SOIC-16 footprint and identical 4KB sector architecture for seamless firmware partitioning.

Availability

W25Q64FVSFJQ is available at Aetrix Electronics and suitable for industrial control systems, automotive infotainment head units, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for W25Q64FVSFJQ 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 flash, mobile DRAM, and code storage products for embedded and consumer markets.

The W25Q64FV series was engineered for high-reliability code storage in resource-constrained MCUs, emphasizing fast XIP performance, flexible erase granularity, and integrated security features for secure boot and firmware authenticity.

FAQ

What is the package type and pin count of W25Q64FVSFJQ?

W25Q64FVSFJQ uses an 8-pin SOIC 300-mil package (package code SF) with 16 physical leads - eight functional pins (including /CS, CLK, DI, DO, /WP, /HOLD, VCC, GND) and eight no-connect (NC) terminals. This wide-body SOIC variant improves mechanical stability and solder joint reliability compared to narrow SOIC variants.

Does W25Q64FVSFJQ support Quad SPI mode, and how is it enabled?

Yes, W25Q64FVSFJQ supports Quad SPI mode via the non-volatile Quad Enable (QE) bit in Status Register-2. To activate it, issue Write Enable (06h), then Write Status Register (01h) with value 02h to set QE=1. Once enabled, /WP and /HOLD become IO2 and IO3, allowing four-wire bidirectional data transfer for instructions like Fast Read Quad I/O (EBh).

What is the minimum erase unit size supported by W25Q64FVSFJQ?

W25Q64FVSFJQ supports uniform 4 KB sector erase as its smallest erase unit, with 2,048 such sectors across the 64 M-bit array. This granularity enables precise firmware partitioning - for example, dedicating one sector to immutable bootloader code and others to upgradable application modules - without risking corruption of adjacent regions.

How does W25Q64FVSFJQ handle power-down and wake-up sequences?

W25Q64FVSFJQ enters ultra-low-power mode (<1 µA typical) upon receiving Power-down (B9h) command. Wake-up is triggered by /CS falling edge - no additional command needed. During power-up, /CS must transition from high to low after VCC stabilizes; a pull-up resistor on /CS ensures proper initialization and prevents spurious writes during rail ramp.

Can W25Q64FVSFJQ be used for execute-in-place (XIP) operation, and what features enable it?

Yes, W25Q64FVSFJQ is explicitly designed for XIP operation. Key enablers include Continuous Read Mode (with as few as 8 clocks to address memory), QPI instruction encoding (reducing command overhead), and 104 MHz SPI clock support yielding up to 50 MB/s sustained read throughput - all allowing CPU instruction fetch directly from flash without intermediate RAM buffering.