Winbond Electronics Corporation W25N01GWZEIG TR

Overview

W25N01GWZEIG TR from Winbond is a 1.8V serial SLC NAND flash memory IC with 1G-bit (128MB) capacity, organized as 65,536 × 2,048-byte pages and 1,024 × 128KB erasable blocks. It supports Standard/Dual/Quad SPI interfaces up to 104MHz clock (416MHz equivalent Quad I/O), delivers 40MB/s continuous read throughput, and features on-chip 1-bit ECC, hardware/software write protection, and dual boot-mode default (BUF=1 at power-up). It is used in embedded code shadowing, firmware storage, and industrial HMI systems requiring high-density non-volatile storage in space-constrained designs.

For engineers reviewing the W25N01GWZEIG TR datasheet, W25N01GWZEIG TR pinout, W25N01GWZEIG TR application, or W25N01GWZEIG TR equivalent, key selection considerations include its WSON-8 (8×6mm, ZE) package, 1.7–1.95V supply range, -40°C to +85°C operation, buffer vs. continuous read mode behavior, and Quad SPI timing compliance per JEDEC JESD216.

Technical Context

The W25N01GWZEIG TR implements a true serial NAND architecture with integrated Bad Block Management (BBM) and a configurable Look-Up Table (LUT) for invalid block tracking. Its dual-mode read interface-Buffer Read (default BUF=1) and Continuous Read (BUF=0)-enables flexible access: Buffer Read requires explicit Page Data Read commands between page accesses, while Continuous Read allows seamless sequential reads across pages with a single command.

It uses volatile and OTP-lockable status/configuration registers (SR-1/SR-2) to control ECC enable (ECC-E), output driver strength (ODS), OTP access (OTP-E), and write protection granularity (BP3–BP0, TB, SRP1/SRP0). The /WP and /HOLD pins serve dual roles: dedicated control inputs in Standard/Dual SPI, and bidirectional IO2/IO3 in Quad SPI-mode behavior is strictly governed by WP-E bit state and instruction context.

Key Specifications

Pinout & Package

W25N01GWZEIG TR is packaged in an 8-pad WSON (8×6 mm, package code ZE), with exposed pad thermal enhancement. Pin assignments are fixed and non-remappable; all signals comply with JEDEC-standard SPI pinout conventions for serial flash devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF1GE4AB, W25N01GWZEIG TR adds Continuous Read Mode and user-accessible BBM LUT-reducing host software complexity and enabling field diagnostics. Against MT29F1G01ABAGDWB, it offers SPI-native integration, 1.8V operation, and embedded ECC-eliminating need for external controller logic and lowering BOM count.

Availability

W25N01GWZEIG TR is available at Aetrix Electronics and suitable for industrial HMI firmware storage, edge gateway code shadowing, and medical diagnostic device logging requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for W25N01GWZEIG 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 manufacturer 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 embedded systems-bridging the gap between traditional serial NOR flash and parallel NAND controllers through integrated ECC, BBM, and multi-I/O protocols.

FAQ

What is the default read mode for W25N01GWZEIG TR at power-up?

W25N01GWZEIG TR powers up with Buffer Read Mode enabled (BUF=1), as indicated by the "IG" suffix in its part number. This means the device expects explicit Page Data Read (13h) commands between page accesses unless the Configuration Register is modified to set BUF=0 for Continuous Read Mode. The default behavior ensures backward compatibility with existing SPI flash drivers that assume buffer-based access.

Does W25N01GWZEIG TR support Quad SPI commands with hardware write protection active?

No. When WP-E=1 (hardware protection enabled), the /WP pin becomes a dedicated active-low write lock, and Quad SPI read operations-including Fast Read Quad I/O (EBh/ECh)-are disabled. Only Standard and Dual SPI reads remain functional. To use Quad SPI, WP-E must be cleared to 0, allowing /WP to operate as IO2 and enabling full Quad I/O functionality.

How is bad block management implemented in W25N01GWZEIG TR?

W25N01GWZEIG TR implements on-die Bad Block Management using a user-accessible 2KB Look-Up Table (LUT) stored in dedicated flash space. The LUT is readable via instruction A5h and writable only by the internal BBM engine during erase/program operations. Host software can query the LUT to identify invalid blocks before allocation, enabling robust wear leveling and field failure analysis without requiring external mapping tables.

What is the purpose of the OTP pages in W25N01GWZEIG TR?

W25N01GWZEIG TR includes ten 2KB One-Time-Programmable (OTP) pages used to store immutable data such as device-specific calibration constants, cryptographic keys, or manufacturing traceability codes. Once programmed, OTP pages cannot be erased or rewritten-providing hardware-enforced security for sensitive information. Access requires setting OTP-E=1 in the Configuration Register, and programming is performed using standard program instructions.

Can W25N01GWZEIG TR operate with a 3.3V SPI controller interface?

No. W25N01GWZEIG TR is a 1.8V-only device with absolute maximum ratings specifying VCC ≤ 2.0V. Direct connection to a 3.3V SPI bus will damage the device. Level translation-using bidirectional translators like TXS0108E or discrete MOSFET buffers-is mandatory for interfacing with 3.3V microcontrollers. Signal integrity and timing margins must be re-validated after translation.