Winbond Electronics Corporation W25N02JWZEIF TR

Overview

W25N02JWZEIF TR from Winbond is a 1.8V serial SLC NAND flash memory IC with 2G-bit (256MB) capacity, organized as 131,072 pages × 2,048 bytes, supporting Dual/Quad SPI and DTR interfaces up to 166MHz STR / 80MHz DTR. It delivers 80MB/s continuous read throughput in Continuous Read Mode and integrates on-chip 1-bit ECC, bad block management, and ten 2KB OTP pages. It targets embedded boot code storage and firmware update storage in space-constrained industrial controllers.

For engineers reviewing the W25N02JWZEIF TR datasheet, W25N02JWZEIF TR pinout, W25N02JWZEIF TR application, or W25N02JWZEIF TR equivalent, key selection criteria include 1.8V operation, 2G-bit density, WSON-8 package compatibility, BUF-mode default configuration, and DTR-enabled high-speed read performance for real-time firmware access.

Technical Context

The W25N02JWZEIF TR implements a true serial NAND architecture with internal page buffer (2,048B), uniform 128KB block erase granularity (2,048 blocks total), and hardware-managed bad block replacement via LUT. Its command set fully supports JEDEC-standard SPI opcodes plus extended instructions for DTR reads, ECC status polling, and OTP page access.

It operates in two configurable data transfer modes: Buffer Read Mode (BUF=1, default for G-suffix parts) and Continuous Read Mode (BUF=0, default for T-suffix parts). The ZEIF TR variant uses WSON-8 package (ZE code) with exposed thermal pad, and supports both software and hardware write protection via /WP and /HOLD pins alongside volatile and OTP-lockable status registers.

Key Specifications

Pinout & Package

W25N02JWZEIF TR is housed in an 8-pad WSON-8 (8×6 mm, package code ZE) with exposed thermal pad. Pin 1 is marked by dot; pin 5 is thermal pad (must be connected to ground plane for thermal and electrical stability).

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25N01JWZEIF TR, the W25N02JWZEIF TR doubles storage capacity while retaining identical pinout, timing, and feature set - enabling seamless upgrade in footprint-constrained designs. Against MT29F2G01ABAGDWB-IT:C, it delivers 2× DTR-enabled read bandwidth and unified Winbond command compatibility, reducing firmware porting effort.

Availability

W25N02JWZEIF TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot image retention, automotive ADAS camera modules, and smart energy meter firmware requiring stable component supply across multi-year production cycles.

Supply support for W25N02JWZEIF 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 flash, RAM, and trusted computing devices since 1987.

The W25N SpiFlash family was designed specifically to bring NAND density and cost-efficiency to SPI-based embedded systems - bridging the gap between traditional serial flash and parallel NAND in space- and pin-constrained applications.

FAQ

What is the default BUF mode setting for W25N02JWZEIF TR after power-up?

The W25N02JWZEIF TR uses the 'G' suffix designation, which means its BUF bit is factory-configured to 1 (Buffer Read Mode) by default after power-on reset. This enables immediate page-aligned reads using the 2,048-byte internal buffer. To switch to Continuous Read Mode, the host must issue a Write Status Register command (01h) to clear the BUF bit in Status Register-2 (address Bxh).

Does W25N02JWZEIF TR support DTR (Double Transfer Rate) commands, and what is the maximum DTR clock frequency?

Yes, W25N02JWZEIF TR supports DTR commands for address and data transfers on both clock edges. Its maximum DTR clock frequency is 80MHz, enabling efficient high-speed reads such as DTR Fast Read Quad I/O (EDh/EEh). This achieves effective throughput up to 80MB/s in Continuous Read Mode, verified across the full -40°C to +85°C operating range.

How many OTP pages does W25N02JWZEIF TR provide, and what is their programming restriction?

W25N02JWZEIF TR provides ten 2,048-byte OTP (One-Time Programmable) pages. These pages can be programmed only once per byte - subsequent writes to an already-programmed location are ignored. Programming requires first setting the OTP-E bit (bit 1 of Status Register-2), then issuing the Write Enable (06h) and Page Program (10h) commands. Once locked via OTP-L bit, further programming is permanently disabled.

What package type and dimensions does W25N02JWZEIF TR use, and is thermal pad connection required?

W25N02JWZEIF TR uses the WSON-8 package (8×6 mm, package code ZE) with an exposed thermal pad on the bottom. This pad must be soldered to a PCB ground plane to ensure proper thermal dissipation and electrical stability. The pad is electrically connected to VSS and contributes significantly to reliability under sustained 25mA active current conditions.

How does W25N02JWZEIF TR handle bad blocks, and where is the Look-Up Table stored?

W25N02JWZEIF TR implements hardware-assisted Bad Block Management (BBM) using a dedicated Look-Up Table (LUT) stored in reserved system blocks. The LUT is accessed via Read BBM LUT instruction (A5h) and updated automatically during program/erase operations. Invalid blocks are remapped transparently, and the LUT remains persistent across power cycles - eliminating need for host-side bad block tracking logic.