Winbond Electronics Corporation W25N02KVZEIR

Overview

W25N02KVZEIR from Winbond is a 2G-bit (256MB) SLC QspiNAND Flash memory IC designed for embedded code storage and data logging in space-constrained systems. It supports standard, dual, and quad SPI interfaces with up to 104MHz clock frequency, delivers 50MB/s sequential read throughput, operates from 2.7–3.6V, and features on-chip 8-bit ECC, 128KB uniform block erase, and 60,000 program/erase cycles - deployed in industrial HMI, IoT edge nodes, and firmware update storage.

For engineers reviewing the W25N02KVZEIR datasheet, W25N02KVZEIR pinout, W25N02KVZEIR application, or W25N02KVZEIR equivalent, key selection considerations include its dual/quad SPI compatibility, buffer vs. sequential read mode configuration (BUF bit), hardware/software write protection flexibility, ECC status reporting (ECC-1/ECC-0), and WSON 8x6-mm (ZE) package footprint constraints.

Technical Context

The W25N02KVZEIR implements a QspiNAND architecture combining SPI command simplicity with NAND density efficiency. Its memory array is organized into 2,048 erasable 128KB blocks (131,072 pages × 2,048 bytes), supporting both Buffer Read (default, BUF=1) and Sequential Read (BUF=0) modes - the latter enabling single-command linear access across full memory. Internal ECC uses an 8-bit Hamming-based correction engine with real-time status reporting via Status Register-3.

It supports JEDEC-standard instruction set extensions including Fast Read Quad I/O (6Bh/6Ch), Deep Power-Down (B9h), and OTP page access (OTP-E=1). Write protection is configurable via volatile BP[3:0] bits and OTP-lockable SRP[1:0], with /WP pin behavior dynamically controlled by WP-E bit - switching between dedicated hardware lock (WP-E=1) and quad I/O function (WP-E=0).

Key Specifications

Pinout & Package

W25N02KVZEIR is packaged in an 8-pad WSON 8×6-mm (JEDEC MO-252, package code ZE), with exposed thermal pad. Pin functions are electrically defined per SPI mode: standard/dual SPI uses /CS, CLK, DI, DO, /WP, /HOLD; quad SPI repurposes /WP and /HOLD as IO2 and IO3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF2GE4AB, W25N02KVZEIR integrates ECC and simplifies firmware development; versus MT29F2G01ABAGDWB, it eliminates parallel bus routing and controller dependency - making it optimal for SPI-native, size- and power-constrained designs.

Availability

W25N02KVZEIR is available at Aetrix Electronics and suitable for industrial HMI, IoT edge node firmware storage, and medical device boot code applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25N02KVZEIR 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 - serving automotive, industrial, and communications markets since 1987.

The W25N QspiNAND product line was developed to bridge the density gap between serial NOR and traditional NAND, delivering NAND economics with SPI simplicity - targeting cost-sensitive, space-constrained embedded systems needing >128MB non-volatile storage.

FAQ

What is the package type and dimensions of W25N02KVZEIR?

W25N02KVZEIR uses an 8-pad WSON package measuring 8mm × 6mm with exposed thermal pad (JEDEC MO-252, package code ZE). This compact footprint supports high-density PCB layouts and provides adequate thermal dissipation for sustained read/write operations without heatsinking.

Does W25N02KVZEIR support Quad SPI operation, and how is it enabled?

Yes, W25N02KVZEIR supports Quad SPI using IO0–IO3 pins (DI, DO, /WP, /HOLD). It is enabled by issuing Fast Read Quad I/O (6Bh/6Ch) or Quad Load Program Data (32h/34h) instructions - with /WP and /HOLD automatically repurposed as IO2 and IO3 when quad mode is active.

How does the on-chip ECC work in W25N02KVZEIR, and where are status flags reported?

W25N02KVZEIR implements an 8-bit Hamming-based ECC engine correcting up to 8-bit errors per 512-byte sector. ECC status is reported in Status Register-3 (Cxh) via ECC-1 and ECC-0 bits - indicating "No Error", "1–3 Bit Correction", "4–8 Bit Correction", or "Uncorrectable Error" - enabling host-level error response without external logic.

Can W25N02KVZEIR be used for Execute-in-Place (XIP) applications?

Yes, W25N02KVZEIR supports XIP via Dual/Quad SPI Fast Read instructions (e.g., 3Bh, 6Bh) at up to 104MHz clock rate, delivering effective bandwidths of 208Mbps or 416Mbps. Its uniform 128KB block structure and low-latency sequential read mode make it suitable for direct code execution in resource-constrained microcontrollers.

What is the difference between Buffer Read and Sequential Read modes in W25N02KVZEIR?

Buffer Read (BUF=1, default) loads one 2,048-byte page into internal buffer for burst reads; Sequential Read (BUF=0) enables continuous linear access across multiple pages with a single command - reducing instruction overhead and improving throughput for large data transfers like firmware images or log files.