Winbond Electronics Corporation W25Q256FVEJF TR

Overview

W25Q256FVEJF 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, 104MHz max clock, and single 2.7–3.6V supply. It enables XIP execution in embedded boot code storage and firmware update applications.

For engineers reviewing the W25Q256FVEJF TR datasheet, W25Q256FVEJF TR pinout, W25Q256FVEJF TR application, or W25Q256FVEJF TR equivalent, key selection criteria include 4-byte addressing support, Quad I/O enable (QE bit), /HOLD or /RESET dual-function pin behavior, and JEDEC SFDP register compliance for auto-configuration.

Technical Context

The W25Q256FVEJF TR implements a flexible SPI-compatible command set with hardware- and software-controlled write protection, including volatile/non-volatile status register bits (BP0–BP3, TB, CMP, SRP0/SRP1), programmable output drive strength (DRV0/DRV1), and HOLD/RESET function selection via HOLD/RST bit. It supports both 3-byte and 4-byte address modes, with B7h/E9h instructions to enter/exit 4-byte mode.

Its architecture includes three 256-byte security registers with OTP lock capability, a 64-bit unique ID, and Erase/Program Suspend & Resume functionality. The device uses internal high-voltage generators for program/erase operations and features continuous read mode with wrap lengths of 8/16/32/64 bytes and ≤8-clock instruction overhead for true XIP operation.

Key Specifications

Pinout & Package

W25Q256FVEJF TR is packaged in an 8-pad WSON 8×6 mm (Package Code E), with exposed pad thermal design. Pin functions are defined per JEDEC-standard pad layout and support shared IO roles depending on interface mode (e.g., /WP and /HOLD become IO2/IO3 when QE=1).

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 S25FL256SAGMFV001, the W25Q256FVEJF TR uniquely combines QPI, SFDP, 4-byte addressing, and security registers in a compact WSON-8 package - making it optimal for resource-constrained, secure, and auto-configurable embedded systems.

Availability

W25Q256FVEJF TR is available at Aetrix Electronics and suitable for boot code storage, firmware update, configuration data logging, and secure key storage requiring stable component supply across industrial, automotive, and networking product lifecycles.

Supply support for W25Q256FVEJF 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, mobile DRAM, and serial flash memory solutions for embedded and consumer applications.

The W25Q series targets high-performance, secure, and space-constrained embedded systems - designed to replace parallel NOR flash with SPI-compatible interfaces while delivering XIP, security, and configurability.

FAQ

What is the package type and footprint of the W25Q256FVEJF TR?

The W25Q256FVEJF TR uses an 8-pad WSON 8×6 mm package (Package Code E) with exposed thermal pad. Its footprint matches JEDEC MO-252 standards and is pin-compatible with other Winbond W25QxxFV variants in the same package code, enabling direct substitution in existing WSON-8 layouts without PCB revision.

Does the W25Q256FVEJF TR support 4-byte addressing, and how is it enabled?

Yes, the W25Q256FVEJF TR supports 4-byte addressing for access beyond 16 MB. It is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h). The setting persists until Exit 4-Byte Address Mode (E9h) is executed or power is cycled. The ADP bit in Status Register-1 determines default mode at power-up.

How does the /HOLD pin function differ between Standard SPI and Quad SPI modes on the W25Q256FVEJF TR?

In Standard SPI mode (QE = 0), the /HOLD pin pauses ongoing operations when pulled low. In Quad SPI mode (QE = 1), that pin becomes IO3 and is no longer available as /HOLD. The HOLD/RST bit in Status Register-1 controls whether IO3 functions as /HOLD or /RESET in 8-pin packages - but only when QE = 0.

What security mechanisms does the W25Q256FVEJF TR provide for protecting firmware or configuration data?

The W25Q256FVEJF TR provides multiple layers: hardware /WP pin protection, non-volatile status register BP/TB/CMP bits for sector-level locking, individual block/sector lock instructions (36h/39h), global lock (7Eh/98h), and three 256-byte OTP-lockable security registers. These prevent unauthorized read/write/erase of designated memory regions or sensitive keys.

Is the W25Q256FVEJF TR compatible with standard SPI controllers that do not support Quad I/O or QPI?

Yes, the W25Q256FVEJF TR is fully backward-compatible with standard SPI controllers. It operates in Standard SPI mode by default (QE = 0), using /CS, CLK, DI, DO, /WP, and /HOLD pins. All basic instructions (e.g., 03h Read Data, 02h Page Program) are supported without requiring Quad I/O or QPI enablement.