Winbond Electronics Corporation W25Q256FVBJQ TR

Overview

W25Q256FVBJQ TR from Winbond is a 256M-bit (32MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, operating at up to 104 MHz clock rate with 50 MB/s continuous read throughput. It features uniform 4KB sectors (8,192 total), 32KB/64KB blocks, 1–256 byte page programming, and supports execute-in-place (XIP) for code storage in embedded microcontrollers.

For engineers reviewing the W25Q256FVBJQ TR datasheet, W25Q256FVBJQ TR pinout, W25Q256FVBJQ TR application, or W25Q256FVBJQ TR equivalent, key selection criteria include 4-byte addressing support, Quad Enable (QE) bit configuration, /HOLD vs /RESET pin behavior in SOIC-16 vs WSON packages, and JEDEC SFDP register compatibility for auto-configuration.

Technical Context

The W25Q256FVBJQ TR implements a flexible SPI-compatible command set with three address modes (3-byte, 4-byte, and ADP-configurable power-up mode), enabling seamless migration from legacy 16MB devices. Its dual-mode /HOLD or /RESET pin (pin 7 in WSON-8, pin 1 in SOIC-16) is controlled by the HOLD/RST bit in Status Register-3 and requires QE=0 for /HOLD functionality.

It integrates volatile/non-volatile status registers with block protection (BP3–BP0), top/bottom lock (TB), complement protect (CMP), and security register locks (LB3–LB1), plus three 256-byte OTP-locked security registers. The device uses internal high-voltage generators for erase/program operations without external VPP.

Key Specifications

Pinout & Package

W25Q256FVBJQ TR is packaged in an 8-pad WSON 8×6 mm (Package Code E), with exposed pad thermal enhancement. Pin 1 is /CS; pins 2–3–5–7 are bidirectional IOs (IO1, IO2, IO0, IO3); pin 4 is GND; pin 6 is CLK; pin 8 is VCC. /WP and /HOLD share IO2/IO3 functions only when QE=0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L25645GM2I-10G and S25FL256SAGMFI000, the W25Q256FVBJQ TR offers identical 8-pad WSON footprint and Quad I/O performance but provides dedicated /HOLD or /RESET flexibility in SOIC-16 and distinct security register locking-critical for medical and automotive OTA update chains.

Availability

W25Q256FVBJQ TR is available at Aetrix Electronics and suitable for industrial HMI displays, automotive ADAS modules, medical infusion pumps, smart grid RTUs, and IoT gateway firmware storage requiring stable component supply across multi-year production cycles.

Supply support for W25Q256FVBJQ 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 DRAM, serial flash, and mobile RAM solutions since 1987.

The W25Q series targets cost-sensitive, space-constrained embedded systems requiring high-speed serial code storage, XIP execution, and robust security features-designed specifically for MCU boot and firmware update applications.

FAQ

What is the package type and pin count of the W25Q256FVBJQ TR?

The W25Q256FVBJQ TR uses an 8-pad WSON (8×6 mm) package with exposed thermal pad. It has eight terminals: /CS, DO/IO1, /WP/IO2, GND, DI/IO0, CLK, /HOLD or /RESET/IO3, and VCC. This matches Package Code E per Winbond's ordering matrix and is distinct from the 16-pin SOIC or 24-ball TFBGA variants of the same family.

Does the W25Q256FVBJQ TR support 4-byte addressing, and how is it enabled?

Yes, the W25Q256FVBJQ TR supports 4-byte addressing for full 256M-bit access. It is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h). The setting persists until Exit 4-Byte Address Mode (E9h) is issued or power is cycled-unless the ADP bit (Status Register-1 bit 5) is set to retain the mode across power cycles.

How does the /HOLD pin function differ between standard SPI mode and Quad SPI mode on the W25Q256FVBJQ TR?

In standard or dual SPI mode (QE=0), pin 7 functions as /HOLD to pause ongoing reads/writes. In Quad SPI mode (QE=1), that same pin becomes IO3 and the /HOLD function is disabled. The W25Q256FVBJQ TR datasheet explicitly states /HOLD is unavailable when QE=1-no workaround exists without toggling QE and reinitializing the interface.

Can the W25Q256FVBJQ TR be used for execute-in-place (XIP) applications, and what interface mode is recommended?

Yes, the W25Q256FVBJQ TR supports true XIP operation using its Continuous Read Mode with Quad I/O or QPI. For optimal performance, Quad I/O with Fast Read Quad I/O (6Bh/6Ch) or QPI with Read Data (03h) is recommended-achieving up to 50 MB/s sustained throughput and minimizing instruction overhead for cache-line-aligned fetches.

What security features are implemented in the W25Q256FVBJQ TR, and how are they enforced?

The W25Q256FVBJQ TR implements hardware-enforced security via three 256-byte OTP-lockable security registers, 64-bit unique ID, SFDP register, and status register protection bits (SRP0/SRP1). Block-level protection is enforced through BP3–BP0, TB, and CMP bits-each requiring both software write-enable and hardware /WP pin assertion (when active) to modify protected regions.