Winbond Electronics Corporation W25Q257FVFIG

Overview

W25Q257FV from Winbond is a 256 M-bit (32 MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 131,072 × 256-byte pages with uniform 4 KB sector erase, 32 KB/64 KB block erase, and chip erase capabilities. It operates from 2.7 V to 3.6 V, draws <1 µA in power-down mode, and supports true execute-in-place (XIP) via Continuous Read Mode with ≤8-clock instruction overhead.

For engineers reviewing the W25Q257FV datasheet, W25Q257FV pinout, W25Q257FV application, or W25Q257FV equivalent, key selection considerations include 104 MHz SPI clock support, Quad Enable (QE) bit dependency for IO2/IO3 functionality, 4-byte addressing mode activation (B7h), hardware /RESET availability only in SOIC-16 package, and JEDEC SFDP register compliance for auto-configuration.

Technical Context

The W25Q257FV implements a dual-mode SPI/QPI command architecture with configurable HOLD/RST pin behavior via Status Register-2 bit HOLD/RST and non-volatile ADP bit controlling default address mode (3- vs 4-byte). Its internal logic supports simultaneous instruction decode for standard, dual, quad, and QPI protocols using shared CLK, /CS, and bidirectional IO lines-requiring QE=1 to enable IO2 (/WP) and IO3 (/HOLD) for Quad I/O operation.

Memory organization includes 8,192 erasable 4 KB sectors and 512 erasable 64 KB blocks, with programmable write protection enforced through volatile/non-volatile BP/TB/CMP/SRP bits and three 256-byte OTP-lockable security registers. Erase/program suspend/resume functionality enables background operations without halting host communication.

Key Specifications

Pinout & Package

W25Q257FV is available in two packages: 8-pad WSON 8×6 mm (Package Code E) and 16-pin SOIC 300-mil (Package Code F). The WSON variant uses shared IO functions where /WP and /HOLD double as IO2 and IO3 only when Quad Enable (QE) = 1; the SOIC variant adds dedicated /RESET and NC pins, enabling independent reset control without status register configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25735F and S25FL256S, the W25Q257FV delivers superior XIP performance via QPI and Continuous Read Mode, built-in SFDP for plug-and-play initialization, and dedicated security registers-making it optimal for secure, high-speed boot and firmware storage where deterministic latency and cryptographic isolation are essential.

Availability

W25Q257FV is available at Aetrix Electronics and suitable for boot code storage, firmware update storage, configuration data retention, secure key storage, and industrial HMI graphics loading requiring stable component supply and long-term lifecycle support.

Supply support for W25Q257FV 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 NOR/NAND flash, SRAM, and mobile DRAM.

The W25Q series targets high-performance, secure embedded applications-designed for code execution, firmware storage, and trusted data retention in resource-constrained systems with strict power and footprint requirements.

FAQ

What is the maximum SPI clock frequency supported by the W25Q257FV?

The W25Q257FV supports a maximum SPI clock frequency of 104 MHz in Standard, Dual, and Quad SPI modes. At this rate, Dual I/O achieves an effective throughput of 208 MB/s and Quad I/O reaches 416 MB/s using Fast Read Dual/Quad I/O instructions. This specification is guaranteed across the full –40°C to +85°C operating temperature range and 2.7–3.6 V supply voltage.

Does the W25Q257FV support 4-byte addressing, and how is it enabled?

Yes, the W25Q257FV supports both 3-byte and 4-byte addressing modes. The 4-byte mode is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h); it can be exited using the Exit 4-Byte Address Mode instruction (E9h). The ADP bit in Status Register-2 determines the default power-up address mode-non-volatile and configurable via Write Status Register-2 (31h) instruction.

How does the Quad Enable (QE) bit affect pin functionality on the W25Q257FV?

The Quad Enable (QE) bit in Status Register-2 controls whether /WP and /HOLD pins function as hardware protection inputs or as IO2 and IO3 for Quad SPI operation. When QE=0, /WP and /HOLD retain their standard roles; when QE=1, they become bidirectional I/O lines. This bit must be set before issuing Quad SPI instructions, and its state persists across power cycles if written non-volatily.

Is the /RESET pin available on all W25Q257FV package variants?

No. The dedicated /RESET pin is only present on the 16-pin SOIC 300-mil (Package Code F) variant. In the 8-pad WSON 8×6-mm (Package Code E) package, the /HOLD pin doubles as /RESET only when QE=0 and the HOLD/RST bit in Status Register-2 is configured accordingly; when QE=1, neither /HOLD nor /RESET functionality is available in WSON.

What security features does the W25Q257FV provide beyond basic write protection?

The W25Q257FV provides layered security including three 256-byte OTP-lockable security registers, a factory-programmed 64-bit unique ID, JEDEC SFDP register for authenticated parameter discovery, and individual sector/block lock/unlock instructions (36h/39h/7Eh/98h). These features enable secure boot, firmware attestation, and cryptographic key isolation beyond standard BP/TB/CMP-based array protection.