Winbond Electronics Corporation W25N04KVTBIU TR

Overview

W25N04KVTBIU TR from Winbond is a 4G-bit (512MB) SLC QspiNAND Flash memory IC with Dual/Quad SPI interface, organized as 262,144 × 2,048-byte pages and 2,048 × 128KB erasable blocks. It supports 104MHz clock, 50MB/s sequential read, on-chip 8-bit ECC, and operates from 2.7V–3.6V across –40°C to +85°C. It enables code shadowing, XIP execution, and data storage in space-constrained embedded systems.

For engineers reviewing the W25N04KVTBIU TR datasheet, W25N04KVTBIU TR pinout, W25N04KVTBIU TR application, or W25N04KVTBIU TR equivalent, key selection criteria include SPI mode flexibility (Standard/Dual/Quad), buffer vs. sequential read modes, hardware/software write protection, OTP page availability, and TFBGA-24 package compatibility with industrial temperature range.

Technical Context

The W25N04KVTBIU TR implements a QspiNAND architecture that merges SPI command simplicity with NAND density efficiency. It uses a 2,048-byte internal buffer for page programming and supports both Buffer Read (default, BUF=1) and Sequential Read (BUF=0) modes-enabling single-command full-array access without address incrementing.

Its dual-layer protection system includes volatile/OTP-configurable Block Protect bits (BP3–BP0), Write Protection Enable (WP-E), and Status Register Protect (SRP1/SRP0), plus dedicated /WP and /HOLD pins with mode-dependent functionality. ECC status reporting (ECC-1/ECC-0, BFD/BFS/BFR) and deep power-down (1µA) support robust data integrity and low-power operation.

Key Specifications

Pinout & Package

W25N04KVTBIU TR is packaged in a 24-ball TFBGA 8×6-mm (Package Code TB, 5×5 ball array), pin-compatible with other W25N04KV variants in same footprint. Pin functions are defined per JEDEC-standard ball assignments and support shared SPI bus topology with hold and write-protect control.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QspiNAND flash memory applications.

Compared with MX35LF4GEIM-12G, W25N04KVTBIU TR delivers autonomous ECC handling and faster sequential access-reducing MCU firmware burden and improving data throughput. Against MT29F4G08ABAEAWP-AITX, it eliminates controller dependency and shrinks BOM by integrating command logic and interface into a single SPI-compatible device.

Availability

W25N04KVTBIU TR is available at Aetrix Electronics and suitable for industrial HMI displays, edge AI sensor nodes, medical handheld diagnostics, automotive infotainment bootloaders, and battery-powered IoT gateways requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature performance.

Supply support for W25N04KVTBIU 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 global supplier of specialty DRAM, mobile DRAM, Code Storage Flash, and TrustME® secure flash memory solutions, serving automotive, industrial, communications, and consumer markets since 1987.

The W25N QspiNAND product line was designed to replace legacy parallel NAND in space- and pin-constrained embedded systems-delivering NAND density with SPI simplicity, integrated ECC, and industrial temperature reliability without external controllers.

FAQ

What is the package type and pin count of W25N04KVTBIU TR?

W25N04KVTBIU TR uses a 24-ball TFBGA 8×6-mm package (Package Code TB, 5×5 ball array) with standard JEDEC-compliant ball assignments. It features eight functional terminals: /CS, CLK, DI (IO0), DO (IO1), /WP (IO2), /HOLD (IO3), VCC, and GND-plus multiple NC balls. This matches the mechanical and thermal profile of other W25N04KV variants in the same footprint.

Does W25N04KVTBIU TR support Quad SPI operation and what are its maximum clock and throughput rates?

Yes, W25N04KVTBIU TR fully supports Quad SPI operation using IO0–IO3 pins. It accepts SPI clocks up to 104MHz, delivering an effective 416MHz data rate (104MHz × 4) during Fast Read Quad I/O commands. Measured sequential read throughput reaches 50MB/s-validated under buffer read mode with continuous addressing and optimal host timing margins.

How does the on-chip ECC function in W25N04KVTBIU TR and how is it configured?

W25N04KVTBIU TR integrates an 8-bit ECC engine that automatically corrects errors during read operations. ECC is enabled via the volatile ECC-E bit (bit 4) in Configuration Register (Status Register-2). Correction status is reported through ECC-1/ECC-0 bits in Status Register-3, while bit-flip metrics (BFD, BFS, BFR) are accessible via extended ECC registers-allowing real-time health monitoring without host intervention.

What is the difference between Buffer Read and Sequential Read modes in W25N04KVTBIU TR?

Buffer Read (BUF=1, default) behaves like conventional SPI flash: each Read Data (03h) or Fast Read (0Bh) command accesses one page or sector, requiring explicit address updates. Sequential Read (BUF=0) enables single-command linear access across the entire memory array-ideal for streaming firmware or media assets-without address incrementing or command repetition, reducing host CPU overhead significantly.

Can W25N04KVTBIU TR be used in automotive applications and what temperature grade does it support?

W25N04KVTBIU TR is rated for –40°C to +85°C (Industrial Grade), meeting requirements for many under-hood and cabin-located automotive subsystems such as telematics gateways and display modules. While not AEC-Q100 qualified out-of-box, its thermal stability, 10-year data retention, and robust ECC make it suitable for non-safety-critical automotive applications where qualification can be completed at system level.