Winbond Electronics Corporation W25N04KVTBIR

Overview

W25N04KVTBIR 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 for embedded code storage and data logging in space-constrained industrial controllers.

For engineers reviewing the W25N04KVTBIR datasheet, W25N04KVTBIR pinout, W25N04KVTBIR application, or W25N04KVTBIR equivalent, key selection criteria include TFBGA-24 (8×6mm, 5×5 ball array) package compatibility, buffer vs. sequential read mode configuration (BUF bit), ECC enable control (ECC-E), and hardware write-protection behavior under WP-E=1.

Technical Context

The W25N04KVTBIR implements a QspiNAND architecture combining SPI command simplicity with NAND density-supporting standard, dual, and quad I/O protocols via shared IO0–IO3 pins. Its internal 2,048-byte buffer enables full-page programming and sequential read access across the entire 4G-bit array with a single instruction.

It integrates three volatile/OTP-configurable status registers (SR-1/SR-2/SR-3) governing block protection (BP3–BP0), ECC enable (ECC-E), hold disable (H-DIS), and buffer/sequential mode (BUF). Real-time ECC status (ECC-1/ECC-0) and failure flags (P-FAIL, E-FAIL) are reported in SR-3 for system-level error handling.

Key Specifications

Pinout & Package

W25N04KVTBIR uses a 24-ball TFBGA 8×6-mm package (Package Code TB, 5×5 ball array), with 8 functional terminals and 16 no-connect (NC) balls. Pin assignments follow JEDEC-standard layout for mechanical compatibility and thermal performance in high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF4GEIM-12G, W25N04KVTBIR offers superior firmware update efficiency via Sequential Read Mode and tighter voltage tolerance; versus MT29F4G08ABAEAWP-AIT, it eliminates NAND controller dependency and reduces BOM count by integrating ECC and command translation.

Availability

W25N04KVTBIR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device data logging, smart meter firmware & logs, and automotive telematics black box applications requiring stable component supply, long lifecycle support, and guaranteed traceable sourcing.

Supply support for W25N04KVTBIR 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 memory solutions, including NOR/NAND flash, RAM, and trusted computing ICs since 1987.

The W25N QspiNAND product line targets cost-sensitive, space-constrained embedded systems needing NAND density with SPI simplicity-designed specifically for code shadowing, XIP, and reliable data logging without external ECC or NAND controller overhead.

FAQ

What is the package type and footprint of W25N04KVTBIR?

W25N04KVTBIR uses a 24-ball TFBGA package measuring 8mm × 6mm with a 5×5 ball array (Package Code TB). It features 8 active signal balls (/CS, CLK, DI/IO0, DO/IO1, /WP/IO2, /HOLD/IO3, VCC, GND) and 16 no-connect (NC) balls. The land pattern matches JEDEC MO-276AA standards, enabling drop-in compatibility with other 8×6mm TFBGA flash devices in high-density layouts.

Does W25N04KVTBIR support execute-in-place (XIP) operation?

Yes, W25N04KVTBIR supports XIP via Dual and Quad SPI interfaces-allowing microcontrollers to execute code directly from flash without copying to RAM. Its 104MHz clock and Fast Read Quad I/O instructions deliver up to 416MHz effective bandwidth, while the 2,048-byte internal buffer ensures low-latency instruction fetches. XIP performance is optimized in Buffer Read Mode (BUF=1), where page-aligned reads minimize latency.

How does the hardware write protection work on W25N04KVTBIR?

Hardware write protection on W25N04KVTBIR is controlled by the WP-E bit in Status Register-1. When WP-E=1 and the /WP pin is pulled low (GND), the entire device-including memory array, OTP pages, and all status/configuration registers-becomes read-only. Quad SPI read commands are also disabled. This provides tamper-resistant firmware storage ideal for certified industrial or medical applications where accidental or malicious writes must be physically prevented.

What is the purpose of the BUF bit in W25N04KVTBIR's configuration register?

The BUF bit (bit 7 of Status Register-2) selects between two fundamental read modes in W25N04KVTBIR: Buffer Read Mode (BUF=1, default) enables traditional page-aligned random access, while Sequential Read Mode (BUF=0) allows a single Read command to stream data continuously across the entire 4G-bit memory array. This eliminates host-side address calculation overhead and simplifies firmware for bulk data transfers like firmware updates or log dumps.

Can W25N04KVTBIR operate across extended temperature ranges?

W25N04KVTBIR is qualified for Industrial Grade operation from -40°C to +85°C. An Industrial Plus Grade variant supports -40°C to +105°C, confirmed by Winbond's reliability testing and documented in the device's ordering information table. Both grades maintain full specification compliance-including 60,000 P/E cycles and 10-year data retention-across their respective temperature ranges, making W25N04KVTBIR suitable for under-hood automotive or outdoor industrial deployments.