Winbond Electronics Corporation W25N04KVZEIR TR

Overview

W25N04KVZEIR TR from Winbond is a 4G-bit (512MB) SLC QspiNAND Flash memory with Dual/Quad SPI interface, organized as 262,144 × 2,048-byte pages and 2,048 × 128KB erasable blocks. It supports 104MHz SPI clocking (208MHz dual, 416MHz quad), delivers 50MB/s sequential read throughput, and operates on 2.7–3.6V with 25mA active / 10µA standby current. It is used for code shadowing, XIP execution, and embedded data storage in space-constrained industrial controllers.

For engineers reviewing the W25N04KVZEIR TR datasheet, W25N04KVZEIR TR pinout, W25N04KVZEIR TR application, or W25N04KVZEIR TR equivalent, key selection considerations include its 8-pin WSON 8×6-mm (ZE) package, configurable ECC enable (ECC-E bit), Buffer/Sequential Read mode (BUF bit), hardware/software write protection via /WP and SRP bits, and support for Fast Read Quad I/O (6Bh/6Ch) and Deep Power-Down (B9h).

Technical Context

The W25N04KVZEIR TR implements a unified SPI-compatible command set supporting Standard, Dual, and Quad I/O protocols with shared pins (IO0–IO3) dynamically repurposed per mode. Its internal architecture includes a 2,048-byte page buffer, on-die 8-bit ECC engine with status reporting (ECC-1/ECC-0), and three volatile/OTP-configurable status registers (SR-1/SR-2/SR-3) governing block protection, driver strength, and read mode selection.

It features dual operational read modes: Buffer Read (BUF=1, default) for page-aligned access and Sequential Read (BUF=0) enabling continuous array streaming with single command initiation. Write protection is enforced via both hardware (/WP pin behavior controlled by WP-E bit) and software (BP3–BP0, SRP1/SRP0), with OTP-lockable register bits ensuring permanent configuration integrity after programming.

Key Specifications

Pinout & Package

W25N04KVZEIR TR is packaged in an 8-pad WSON 8×6-mm (JEDEC MO-252, package code ZE), with exposed thermal pad. Pin functions are fully defined per datasheet Figure 1a and Section 3.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF4GE4AB-Z4I and GD5F4GQ4UCYIGR, the W25N04KVZEIR TR provides SPI-native integration, on-die ECC, and seamless drop-in replacement for legacy SPI flash-reducing BOM count and eliminating external ECC logic while maintaining 50MB/s throughput and industrial temperature support.

Availability

W25N04KVZEIR TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device data logging, and smart energy meter code execution requiring stable component supply, long-life product continuity, and guaranteed traceable sourcing.

Supply support for W25N04KVZEIR 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 semiconductor company specializing in specialty memory solutions including NOR/NAND flash, RAM, and trusted computing ICs.

The W25N QspiNAND product line was designed to bridge the density gap between SPI NOR and legacy parallel NAND, delivering NAND-level capacity with SPI simplicity for resource-constrained embedded systems.

FAQ

What is the package type and footprint of the W25N04KVZEIR TR?

The W25N04KVZEIR TR uses an 8-pad WSON 8×6-mm package (JEDEC MO-252, package code ZE) with exposed thermal pad. Its footprint matches standard WSON-8 land patterns; pin 1 is marked by a dot or beveled corner, and pin assignments follow Figure 1a in the datasheet-/CS (1), DO (2), /WP (3), GND (4), DI (5), CLK (6), /HOLD (7), VCC (8). This compact package enables high-density PCB layouts in space-limited applications.

Does the W25N04KVZEIR TR support Quad SPI commands and what are the key ones?

Yes, the W25N04KVZEIR TR supports full Quad SPI operation using IO0–IO3 pins. Key Quad instructions include Fast Read Quad Output (6Bh/6Ch), Fast Read Quad I/O (EBh/ECh), Quad Load Program Data (32h), and Quad Random Load Program Data (34h). These commands require BUF=0 for Sequential Read mode or BUF=1 for Buffer Read mode, and are enabled by setting appropriate configuration bits (e.g., ECC-E, ODS) in Status Register-2. All Quad operations are electrically validated up to 104MHz clock frequency.

How does the on-die ECC work in the W25N04KVZEIR TR and how is it configured?

The W25N04KVZEIR TR integrates an 8-bit on-die ECC engine that automatically corrects errors during read operations. ECC is enabled via the ECC-E bit (bit 4) in Status Register-2 (address Bxh); when set to 1, correction is active. Status bits ECC-1/ECC-0 in Status Register-3 report correction results (00 = no error, 01 = corrected, 10 = uncorrectable). Additional registers (BFD, BFS, BFR) allow monitoring of bit-flip counts and thresholds. Configuration is volatile unless locked via OTP bits SR1-L and OTP-L.

Can the W25N04KVZEIR TR be used for Execute-in-Place (XIP) applications?

Yes, the W25N04KVZEIR TR supports Execute-in-Place (XIP) from Dual and Quad SPI interfaces, enabling direct CPU instruction fetch without copying to RAM. This is achieved using Fast Read Dual/Quad I/O instructions (BBh/BCh or EBh/ECh) with continuous address incrementing. The device's 104MHz clock support and low-latency page buffer allow deterministic instruction timing, making it suitable for real-time control firmware in microcontrollers lacking internal flash.

What is the difference between Buffer Read and Sequential Read modes in the W25N04KVZEIR TR?

Buffer Read mode (BUF=1, default) loads one 2,048-byte page into the internal buffer on command initiation, allowing random byte access within that page. Sequential Read mode (BUF=0) enables continuous streaming across multiple pages with a single command-ideal for bulk data transfer. Switching between modes is done by writing the BUF bit in Status Register-2; Sequential Read achieves 50MB/s throughput, while Buffer Read optimizes for low-latency random access with page-aligned addressing.