Winbond Electronics Corporation W25N02JWZEIC

Overview

W25N02JWZEIC from Winbond is a 1.8V 2G-bit Serial SLC NAND Flash Memory with Dual/Quad SPI interface, supporting up to 166MHz STR and 80MHz DTR operation. It features 128KB uniform block erase, on-chip 1-bit ECC, and dual read modes (Buffer Read and Continuous Read). The device is configured in 8-pad WSON 8×6-mm package (ZE) and targets embedded code storage and firmware update applications in space-constrained industrial controllers.

For engineers reviewing the W25N02JWZEIC datasheet, W25N02JWZEIC pinout, W25N02JWZEIC application, or W25N02JWZEIC equivalent, key selection criteria include its 2G-bit density, 1.7–1.95V supply range, DTR timing compliance, internal ECC capability, and WSON-8 package compatibility with high-density PCB layouts.

Technical Context

The W25N02JWZEIC implements a standard SPI command set extended with Dual/Quad I/O and DTR protocols, enabling address/data transfers on both clock edges. Its architecture includes a 2,048-byte page buffer, 128KB erasable blocks (2,048 total), and configurable BUF bit selecting between Buffer Read (default for G-suffix) and Continuous Read (T-suffix) modes.

It integrates JEDEC-compliant manufacturer/device ID, programmable write protection (via /WP, /HOLD, and status register bits), and dedicated registers for ECC control (ECC-E), quad enable (QE), and output driver strength (ODS). Bad Block Management uses an on-die Look-Up Table accessible via A5h instruction.

Key Specifications

Pinout & Package

W25N02JWZEIC is housed in an 8-pad WSON 8×6-mm package (JEDEC MO-252, package code ZE), with wettable flank leads for automated optical inspection. Pin 1 is marked by a dot; pins are arranged in a 2×4 grid with 0.5mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT29F2G01ABAGDWB-IT and GD5F2GQ4UCYIGR, W25N02JWZEIC delivers tighter timing margins via DTR, eliminates host-side ECC implementation, and reduces BOM count by integrating BBM-making it optimal for resource-constrained industrial and automotive edge nodes.

Availability

W25N02JWZEIC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot image hosting, smart meter application code deployment, and automotive telematics log buffering requiring stable component supply and long-term lifecycle assurance.

Supply support for W25N02JWZEIC 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, SRAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.

The W25N SpiFlash family was designed to bring NAND density and cost efficiency to SPI-based microcontroller platforms-enabling code execution, firmware updates, and data logging without NAND controller complexity.

FAQ

What is the default read mode for W25N02JWZEIC at power-up?

W25N02JWZEIC powers up in Buffer Read mode (BUF = 1), as indicated by its 'G' suffix in the part numbering scheme. This mode requires explicit Page Data Read (13h) commands before each read operation. The alternative Continuous Read mode (BUF = 0) is enabled by writing '0' to the BUF bit in Status Register-2 (address Bxh), but is not the default for this variant.

Does W25N02JWZEIC support Quad SPI and DTR simultaneously?

Yes, W25N02JWZEIC supports Quad I/O with DTR in Fast Read Quad I/O (EDh) and DTR Fast Read Quad I/O (EDh) instructions. When QE is set and DTR mode is active, data and addresses are transferred on both clock edges across all four I/O lines, achieving up to 640MB/s theoretical bandwidth (80MHz × 8 bits/cycle) under ideal conditions.

How is bad block management implemented in W25N02JWZEIC?

W25N02JWZEIC implements on-die Bad Block Management using a Look-Up Table (LUT) stored in reserved memory space. Invalid blocks are mapped automatically during manufacturing and runtime; the LUT is readable via the A5h instruction. Host software can query and manage replacements without low-level NAND controller logic, reducing firmware development effort.

What is the purpose of the ten 2KB OTP pages in W25N02JWZEIC?

The ten 2,048-byte OTP (One-Time-Programmable) pages in W25N02JWZEIC are used to store immutable data such as device-specific calibration constants, cryptographic keys, or factory-programmed configuration parameters. Once written, these pages cannot be erased or rewritten-ensuring data integrity and security for critical system-level information.

Can W25N02JWZEIC operate reliably at 1.7V supply voltage?

Yes, W25N02JWZEIC is fully specified for operation across 1.70V–1.95V. At 1.7V, all AC/DC parameters-including 166MHz STR clock timing, 80MHz DTR setup/hold, and 25mA active current-are guaranteed per the datasheet's Operating Ranges table (Section 9.2). No derating or performance loss occurs within this range.