Winbond Electronics Corporation W25N04KVTBIR TR

Overview

W25N04KVTBIR TR from Winbond is a 4G-bit (512MB) SLC QspiNAND Flash memory with Dual/Quad SPI interface, organized into 262,144 × 2,048-byte pages and 2,048 uniform 128KB erase blocks. It operates from 2.7V–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 reliability-used in embedded boot storage, firmware code shadowing, and data logging in space-constrained industrial controllers.

For engineers reviewing the W25N04KVTBIR TR datasheet, W25N04KVTBIR TR pinout, W25N04KVTBIR TR application, or W25N04KVTBIR TR equivalent, this page details its TFBGA-24 (8×6mm, 5×5 ball array, package code TB) mechanical interface, buffer/sequential read modes, hardware/software write protection, OTP page support, and JEDEC-compliant command set for robust NAND integration without external ECC logic.

Technical Context

The W25N04KVTBIR TR implements a QspiNAND architecture combining SPI protocol 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-enabling single-command linear access across the entire 4G-bit array. Its dual/quad I/O capability leverages IO0–IO3 pins dynamically: /WP and /HOLD serve as dedicated control inputs in Standard/Dual SPI but become IO2/IO3 in Quad mode.

Internal register control includes volatile and OTP-lockable Protection Register (SR-1) for block-level hardware write protection, Configuration Register (SR-2) for ECC enable (ECC-E), driver strength (ODS), and hold disable (H-DIS), plus Status Register-3 for real-time ECC status (ECC-1/ECC-0), program/erase failure flags (P-FAIL/E-FAIL), and BUSY indication. The device supports 60,000 program/erase cycles and 10-year data retention at -40°C to +85°C.

Key Specifications

Pinout & Package

W25N04KVTBIR TR is packaged in a 24-ball TFBGA (8×6mm, 5×5 ball array, package code TB), optimized for high-density PCB layouts with fine-pitch routing. Pin assignments follow JEDEC MO-270AB standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25N04KVTBIR TR, MX35LF4GEIM-12G offers matching density and speed but lacks integrated ECC and sequential read-increasing host validation burden. MT29F4G08ABAEAWP-AIT provides higher raw bandwidth but abandons SPI compatibility entirely, demanding full hardware redesign.

Availability

W25N04KVTBIR TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device data logging, and smart energy meter boot memory requiring stable component supply across extended product lifecycles.

Supply support for W25N04KVTBIR 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 semiconductor company specializing in specialty memory solutions, including SPI NOR/NAND, RAM, and trusted computing ICs since 1987.

The W25N QspiNAND product line was designed to bridge the gap between SPI NOR simplicity and NAND density-delivering cost-effective, pin-efficient, high-reliability flash for resource-constrained embedded systems.

FAQ

What is the package type and footprint of W25N04KVTBIR TR?

W25N04KVTBIR TR uses a 24-ball TFBGA package measuring 8mm × 6mm with a 5×5 ball array (package code TB). Its footprint complies with JEDEC MO-270AB, featuring 0.8mm ball pitch and exposed thermal pad. This compact form factor supports high-density PCB layouts in space-constrained applications like portable medical devices and smart meters-no larger than standard 8-pin SOIC but with 512MB capacity.

Does W25N04KVTBIR TR support Quad SPI and XIP (execute-in-place)?

Yes, W25N04KVTBIR TR supports Quad SPI operation using IO0–IO3 pins and enables execute-in-place (XIP) for code stored in flash. It implements Fast Read Quad I/O instructions (EBh/ECh) with up to 416MHz equivalent bandwidth, allowing microcontrollers to fetch and execute instructions directly from the memory array-eliminating RAM copy latency in boot-critical applications such as automotive ECUs and industrial HMIs.

How does the on-chip ECC in W25N04KVTBIR TR work, and is it mandatory?

W25N04KVTBIR TR includes configurable on-chip 8-bit ECC that automatically corrects up to 8 bit errors per 512-byte sector. The ECC-E bit in Status Register-2 enables or disables this feature at runtime. While not mandatory, enabling ECC is strongly recommended-especially in industrial or automotive environments-to prevent silent data corruption without burdening the host MCU with software ECC routines. Status bits ECC-1/ECC-0 report correction events for diagnostics.

Can W25N04KVTBIR TR be used as a direct replacement for standard SPI NOR flash?

W25N04KVTBIR TR is not a pin-compatible or functional drop-in replacement for SPI NOR flash due to fundamental architectural differences: it uses NAND-style block erase (128KB), requires page programming via buffer load, and lacks NOR's random read capability. However, it can replace NOR in applications tolerant of sequential access patterns-such as firmware storage-provided the host firmware implements NAND-aware drivers for erase management and bad block handling.

What is the purpose of the ten 2KB OTP pages in W25N04KVTBIR TR?

The ten 2KB OTP (one-time-programmable) pages in W25N04KVTBIR TR provide permanent, tamper-resistant storage for critical device-specific data such as cryptographic keys, calibration coefficients, unique serial numbers, or regulatory compliance identifiers. Once programmed, these pages cannot be erased or rewritten-even by power cycling-ensuring data integrity across the product lifetime. They are accessed via dedicated OTP-E and OTP-L bits in the Configuration Register.