Winbond Electronics Corporation W25N01JWSFIT TR

Overview

W25N01JWSFIT 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 Dual/Quad SPI up to 166MHz STR and 80MHz DTR, delivers 80MB/s continuous read throughput, and features on-chip 1-bit ECC, Bad Block Management, and configurable Buffer/Continuous Read modes. It is used in embedded boot storage, firmware code shadowing, and industrial data logging where space-constrained, low-power, high-reliability non-volatile memory is required.

For engineers reviewing the W25N01JWSFIT TR datasheet, W25N01JWSFIT TR pinout, W25N01JWSFIT TR application, or W25N01JWSFIT TR equivalent, key selection criteria include its 1.7–1.95V supply range, DTR-enabled 80MHz read interface, BUF/Continuous Read mode configuration, OTP page availability, and WSON-8 package compatibility with PCB layout constraints for compact designs.

Technical Context

The W25N01JWSFIT TR implements a standard SPI-compatible command set extended with Dual/Quad I/O and DTR protocols, enabling address/data transfers on both clock edges. Its internal architecture includes a 2,048-byte page buffer, dedicated ECC engine, and Look-Up Table (LUT) for bad block mapping - all managed via volatile and OTP-lockable status/configuration registers (SR1–SR4).

It supports two distinct read execution modes: Buffer Read (default at power-up for G-suffix parts) and Continuous Read (default for T-suffix), differing only in command structure but sharing identical program/erase timing, protection mechanisms, and register access. The device uses software/hardware write protection (/WP, /HOLD), deep power-down (B9h/ABh), and JEDEC-compliant ID reads (9Fh).

Key Specifications

Pinout & Package

W25N01JWSFIT TR is packaged in an 8-pad WSON 8×6-mm (package code ZE), RoHS-compliant, exposed-pad variant optimized for thermal performance and board area reduction in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX35LF1GE4AB-TI and GD5F1GQ4UCYIGR, the W25N01JWSFIT TR uniquely delivers DTR-enabled 80MHz read performance within a 1.8V, WSON-8 footprint while retaining full SPI command compatibility - making it optimal for next-generation compact, low-power, high-throughput embedded storage.

Availability

W25N01JWSFIT TR is available at Aetrix Electronics and suitable for industrial HMI boot storage, medical device firmware image storage, and smart energy meter data logging requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for W25N01JWSFIT 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 global semiconductor manufacturer specializing in specialty memory solutions including NOR/NAND flash, SRAM, and mobile DRAM.

The W25N SpiFlash family was designed to bring NAND density and cost-efficiency to SPI-based embedded systems - bridging the gap between traditional serial flash and parallel NAND by integrating ECC, BBM, and advanced read modes into a standard SPI interface.

FAQ

What is the default read mode for W25N01JWSFIT TR at power-up?

The W25N01JWSFIT TR powers up in Buffer Read Mode (BUF = 1) as indicated by its "G" suffix. This mode configures the device to require explicit Page Data Read (13h) commands before each 2,048-byte page access. Continuous Read Mode (BUF = 0) can be enabled via Write Status Register (1Fh) to allow linear array access with a single Read command - ideal for code shadowing. The W25N01JWSFIT TR supports both modes without hardware change.

Does W25N01JWSFIT TR support DTR (Double Transfer Rate) operation?

Yes, the W25N01JWSFIT TR supports DTR commands including DTR Fast Read (0Dh), DTR Fast Read Dual I/O (BDh), and DTR Fast Read Quad I/O (EDh), all operating up to 80MHz. In DTR mode, addresses and read data are transferred on both rising and falling clock edges, doubling effective bandwidth versus STR at the same clock frequency. DTR functionality requires proper setup of Configuration Register bits (HS=1, QE=1) and is validated per AC Electrical Characteristics in the datasheet.

How many OTP pages does W25N01JWSFIT TR provide, and what are their use cases?

The W25N01JWSFIT TR provides ten 2,048-byte One-Time Programmable (OTP) pages. These pages are used for storing immutable data such as cryptographic keys, device-specific calibration coefficients, unique identifiers, or firmware signature anchors. Once programmed, OTP pages cannot be erased or rewritten - ensuring data integrity and security. Access requires setting the OTP Enable bit (OTP-E) in Status Register-2, and programming follows the Write Enable (06h) → Load Program Data (02h) → Program Execute (10h) sequence.

What package type is used for W25N01JWSFIT TR, and is thermal pad soldering required?

W25N01JWSFIT TR uses the 8-pad WSON 8×6-mm package (package code ZE) with an exposed thermal pad on the bottom. Per Winbond's package specification, the thermal pad must be soldered to a PCB copper pour for reliable thermal dissipation and mechanical stability - especially critical during reflow and under sustained active current (25mA). The pad is internally connected to VSS and must be electrically tied to ground; omitting this connection risks overheating and parametric shift during high-speed Quad/DTR operation.

How does W25N01JWSFIT TR handle bad blocks, and is host firmware involvement required?

W25N01JWSFIT TR implements hardware-assisted Bad Block Management (BBM) using an internal Look-Up Table (LUT) stored in reserved blocks. Factory-defective blocks are pre-mapped at test; field failures trigger automatic remapping during program/erase. Host firmware accesses the LUT via Read BBM LUT (A5h) and manages replacements using Bad Block Management (A1h) instructions. While basic operation requires no host ECC handling, full BBM utilization - including dynamic replacement and LUT updates - demands explicit host implementation per Winbond Application Note AN201-01.