Winbond Electronics Corporation W25Q64FWSSIG TR

Overview

W25Q64FWSSIG TR from Winbond is a 1.8V, 64M-bit (8MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces. It features uniform 4KB sectors, 104MHz max clock frequency, 50MB/s continuous read throughput, and hardware write protection via /WP and /HOLD pins. It is used for code execution in place (XIP), firmware storage, and boot image retention in space-constrained embedded controllers.

For engineers reviewing the W25Q64FWSSIG TR datasheet, W25Q64FWSSIG TR pinout, W25Q64FWSSIG TR application, or W25Q64FWSSIG TR equivalent, key selection considerations include Quad Enable (QE) bit configuration, sector-level erase granularity, 1.65–1.95V supply compatibility, and SOIC-8 (SS) package mechanical fit in legacy PCB layouts.

Technical Context

The W25Q64FWSSIG TR implements a unified SPI-compatible command set with mode-selectable operation: Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), and QPI (2-clock instruction fetch). Its internal architecture includes a 256-byte page buffer, 4,096 erasable 4KB sectors, and three 256-byte one-time-programmable security registers.

Functional behavior depends on volatile/non-volatile status register bits - notably QE (Status Register-2, bit 1) enabling Quad I/O mode, and SRP0/SRP1 controlling write protection lock-down. The /HOLD and /WP pins serve dual roles: dedicated control signals in Standard/Dual mode, but repurposed as IO3 and IO2 respectively when QE=1.

Key Specifications

Pinout & Package

W25Q64FWSSIG TR uses an 8-pin SOIC-208-mil package (Package Code SS), with 1.27mm pitch and standard JEDEC MS-012AC footprint. Pin assignments are electrically identical across SOIC, VSOP, and WSON variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q64FWSSIG TR, MX25L6433FZNI-10G offers lower cost in 3V systems but sacrifices QPI acceleration and 1.8V operation; S25FL164K0XMFI011 delivers higher bandwidth via HyperBus but mandates full hardware and firmware redesign - neither is pin- or software-compatible.

Availability

W25Q64FWSSIG TR is available at Aetrix Electronics and suitable for industrial automation, automotive telematics, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25Q64FWSSIG TR 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 SPI NOR/NAND flash, RAM, and mobile DRAM.

The W25Q series targets embedded systems needing high-speed, low-voltage serial flash with robust security and flexible erase architecture - designed specifically for XIP-capable microcontrollers and SoCs in resource-constrained applications.

FAQ

What is the package type and lead count of W25Q64FWSSIG TR?

W25Q64FWSSIG TR uses an 8-pin SOIC-208-mil (Package Code SS) with 1.27mm pitch and standard JEDEC MS-012AC outline. It is not a leadless package - all eight terminals are gull-wing leads suitable for through-hole or surface-mount reflow assembly. The 'TR' suffix indicates tape-and-reel packaging for automated placement.

Does W25Q64FWSSIG TR support execute-in-place (XIP) operation?

Yes, W25Q64FWSSIG TR supports true XIP via Continuous Read Mode and Quad SPI/QPI interfaces. With as few as 8 clocks to initiate a read and up to 50MB/s sustained throughput, it enables deterministic instruction fetch directly from flash without copying to RAM - verified in ARM Cortex-M and RISC-V MCU reference designs.

How is Quad SPI mode enabled on W25Q64FWSSIG TR?

Quad SPI mode on W25Q64FWSSIG TR is enabled by setting the Quad Enable (QE) bit - bit 1 of Status Register-2 - via Write Status Register-2 (31h) instruction. Once set, /WP and /HOLD pins become IO2 and IO3, and Quad I/O instructions (e.g., EBh, 6Bh) become active. QE is non-volatile and persists across power cycles.

What write protection mechanisms does W25Q64FWSSIG TR provide?

W25Q64FWSSIG TR provides layered write protection: hardware via /WP pin (active-low, effective only when QE=0), and software via Status Register bits BP2–BP0, TB, SEC, and SRP0/SRP1. These allow selective locking of top/bottom 4KB sectors, individual blocks, or the entire array - with optional OTP lock-down for permanent protection.

Is W25Q64FWSSIG TR compatible with standard SPI controllers?

Yes, W25Q64FWSSIG TR is fully backward-compatible with standard SPI controllers operating in Mode 0 (CPOL=0, CPHA=0) or Mode 3 (CPOL=1, CPHA=1). It uses /CS, CLK, DI, and DO pins identically to legacy SPI flash, requiring no firmware changes for basic read/write functionality - Quad and QPI modes are opt-in extensions.