Winbond Electronics Corporation W25Q256FVFIF TR

Overview

W25Q256FVFIF TR from Winbond is a 256M-bit (32MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 131,072 × 256-byte pages with 4KB uniform sector erase granularity, operating from 2.7V–3.6V, and rated for -40°C to +85°C - used for code storage, XIP execution, and firmware updates in embedded microcontrollers.

For engineers reviewing the W25Q256FVFIF TR datasheet, W25Q256FVFIF TR pinout, W25Q256FVFIF TR application, or W25Q256FVFIF TR equivalent, key selection considerations include 104MHz SPI clock support, Quad I/O mode enablement via QE bit, 4KB sector flexibility, hardware /WP and /HOLD control, and TFBGA/WSON package compatibility with space-constrained PCB layouts.

Technical Context

The W25Q256FVFIF TR implements a multi-mode serial interface: Standard SPI uses DI/DO unidirectionally; Dual/Quad SPI repurpose IO0–IO3 bidirectionally; QPI enables 2-clock instruction cycles. Its status register includes volatile/non-volatile BP3–BP0, TB, CMP, SRP0/SRP1, and QE bits controlling protection and Quad mode activation.

It supports 3- and 4-byte addressing modes, with dedicated instructions for Enter/Exit 4-Byte Address Mode (B7h/E9h), Erase/Program Suspend (75h/7Ah), and security register access (42h/44h/48h). The device integrates three 256-byte OTP-lockable security registers and a 64-bit unique ID readable via 4Bh instruction.

Key Specifications

Pinout & Package

W25Q256FVFIF TR is supplied in an 8-pad WSON 8×6-mm package (Package Code E), with exposed thermal pad. Pin functions are defined per JEDEC-standard pad layout and support both Standard/Dual SPI (using /WP and /HOLD) and Quad SPI (reassigning /WP→IO2 and /HOLD→IO3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25645GMI-10G and S25FL256SAGMFIR00, the W25Q256FVFIF TR uniquely balances QPI instruction efficiency, integrated security registers, and compact WSON packaging - making it optimal for cost-sensitive, space-constrained, and security-aware embedded systems where Quad I/O performance and firmware integrity are jointly prioritized.

Availability

W25Q256FVFIF TR is available at Aetrix Electronics and suitable for boot code storage, firmware OTA updates, graphics asset caching, and secure key vault applications requiring stable component supply across industrial, automotive, and consumer electronics programs.

Supply support for W25Q256FVFIF 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 company specializing in specialty memory solutions including NOR/NAND flash, RAM, and mobile DRAM since 1987.

The W25Q series is designed for high-reliability embedded systems requiring fast, flexible, and secure serial code storage - emphasizing XIP capability, sector-level protection, and industrial temperature resilience.

FAQ

What is the maximum SPI clock frequency supported by the W25Q256FVFIF TR?

The W25Q256FVFIF TR supports up to 104 MHz for Standard, Dual, and Quad SPI operations. In Quad I/O mode with Fast Read Quad I/O (6Bh/6Ch), this yields an effective data rate of 416 MB/s (104 MHz × 4). This specification is validated under VCC = 3.0 V to 3.6 V and TA = -40°C to +85°C per the official Winbond datasheet revision I.

Does the W25Q256FVFIF TR support 4-byte addressing, and how is it enabled?

Yes, the W25Q256FVFIF TR supports both 3-byte and 4-byte addressing modes. To enable 4-byte mode, the host must issue the Enter 4-Byte Address Mode instruction (B7h); to disable it, use Exit 4-Byte Address Mode (E9h). The current mode is indicated by the ADS bit (Status Register-1, bit 7) and can be set permanently via ADP bit (Status Register-1, bit 6).

How is Quad SPI mode activated on the W25Q256FVFIF TR?

Quad SPI mode is activated by setting the Quad Enable (QE) bit (Status Register-2, bit 1) to '1'. This reassigns the /WP and /HOLD pins to IO2 and IO3 respectively. QE can be written non-volatilely using Write Status Register-2 (31h) or volatile-only using Write Enable for Volatile Status Register (50h) followed by 31h.

What package type does the W25Q256FVFIF TR use, and what are its key mechanical dimensions?

The W25Q256FVFIF TR uses an 8-pad WSON (Wafer-Level Small Outline No-lead) package measuring 8 mm × 6 mm with 0.5 mm pad pitch and an exposed thermal pad. This package code is designated 'E' in Winbond's ordering nomenclature and is RoHS-compliant with matte tin finish.

Can the W25Q256FVFIF TR be used for secure key storage, and what hardware features enable this?

Yes, the W25Q256FVFIF TR supports secure key storage via three dedicated 256-byte Security Registers, each protected by one-time-programmable (OTP) lock bits (LB1–LB3). Once locked, these registers become read-only and immune to standard erase/write commands - providing tamper-resistant storage for cryptographic keys, certificates, or calibration data.