Winbond Electronics Corporation W25N04KVZEIU TR

Overview

W25N04KVZEIU TR from Winbond is a 4G-bit (512MB) SLC QspiNAND Flash memory with Dual/Quad SPI interface, organized into 262,144 pages of 2,048 bytes each and 2,048 uniform 128KB erasable blocks. It operates from 2.7V to 3.6V, supports up to 104MHz SPI clock (416MHz equivalent in Quad I/O), delivers 50MB/s sequential read throughput, and integrates on-chip 8-bit ECC for NAND array integrity - deployed in embedded boot storage, firmware code shadowing, and industrial data logging systems.

For engineers reviewing the W25N04KVZEIU TR datasheet, W25N04KVZEIU TR pinout, W25N04KVZEIU TR application, or W25N04KVZEIU TR equivalent, key selection considerations include its dual-mode buffer/sequential read capability, hardware/software write protection via /WP and status registers, OTP page programmability, and compatibility with standard SPI, Dual I/O, and Quad I/O instruction sets across industrial temperature range (-40°C to +85°C).

Technical Context

The W25N04KVZEIU TR implements a QspiNAND architecture that merges SPI command simplicity with NAND density efficiency. It uses a 2,048-byte internal buffer for full-page programming and supports both Buffer Read (default, BUF=1) and Sequential Read (BUF=0) modes - the latter enabling single-command linear access across the entire 4G-bit array without address reissuing.

Its register system includes three volatile status registers (SR-1 to SR-3) and extended ECC feature registers (BFD, BFS, BFR, MBF/MFS), all accessible via standard SPI instructions. Write protection is enforced through configurable BP[3:0]/TB bits, WP-E control, and OTP-lockable SRP[1:0], while /WP and /HOLD pins serve dual roles: dedicated hardware controls in Standard/Dual SPI, and IO2/IO3 in Quad SPI mode.

Key Specifications

Pinout & Package

W25N04KVZEIU TR is packaged in an 8-pad WSON 8×6-mm (JEDEC MO-252, package code ZE), optimized for high-density PCB layouts with minimal footprint and thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF4GEIM-12G and MT29F4G08ABAEAWP-AIT, the W25N04KVZEIU TR uniquely combines WSON packaging, on-die 8-bit ECC, OTP programmability, and dual-mode read architecture in a single SPI-native device - reducing BOM count, simplifying layout, and eliminating host-side ECC overhead in resource-constrained embedded designs.

Availability

W25N04KVZEIU TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot image hosting, and smart meter data logging requiring stable component supply, long-lifecycle assurance, and qualified sourcing for production ramp.

Supply support for W25N04KVZEIU 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.

The W25N QspiNAND product line was designed to replace parallel NAND in space-constrained, low-pin-count embedded systems - delivering NAND density with SPI simplicity, integrated ECC, and industrial-grade reliability for firmware, boot, and logging applications.

FAQ

What is the maximum SPI clock frequency supported by the W25N04KVZEIU TR?

The W25N04KVZEIU TR supports up to 104MHz SPI clock frequency in Standard, Dual, and Quad SPI modes. In Quad I/O configurations using Fast Read Quad I/O instructions, this yields an effective data rate of 416MHz (104MHz × 4), enabling 50MB/s sequential read throughput as specified in the datasheet's AC characteristics table.

Does the W25N04KVZEIU TR include built-in error correction, and how is it implemented?

Yes, the W25N04KVZEIU TR integrates an on-chip 8-bit ECC engine that automatically detects and corrects up to 8-bit errors per 512-byte sector. ECC status is reported via ECC-1/ECC-0 bits in Status Register-3, and extended metrics - including bit-flip count detection (BFD), report (BFR), and maximum threshold (MBF/MFS) - are accessible through dedicated ECC feature registers.

How does the /WP pin function in different protection modes on the W25N04KVZEIU TR?

When WP-E = 0 (Software Protection mode), the /WP pin serves as IO2 in Quad SPI and provides active-low write protection only for Status Register-1. When WP-E = 1 (Hardware Protection mode), /WP becomes a dedicated active-low input that disables all write/program/erase functions across the entire device - including memory array, registers, and OTP pages - making it fully read-only.

Can the W25N04KVZEIU TR be used for Execute-in-Place (XIP) applications?

Yes, the W25N04KVZEIU TR supports XIP operation via Dual/Quad SPI interfaces. Its architecture allows direct code execution from flash using Fast Read Dual/Quad I/O instructions, eliminating the need to copy firmware to RAM before execution - a key advantage for memory-constrained microcontrollers in industrial and medical edge devices.

What package type does the W25N04KVZEIU TR use, and what are its key mechanical features?

The W25N04KVZEIU TR uses an 8-pad WSON 8×6-mm package (JEDEC MO-252, package code ZE). It features a near-chip-scale footprint, exposed thermal pad for enhanced heat dissipation, and lead-free, RoHS-compliant construction - optimized for high-density PCB layouts in space-constrained embedded systems where TFBGA is mechanically impractical.