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Winbond Electronics Corporation W25N02KWTBIR
- Part No.:
- W25N02KWTBIR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 24-TBGA
- Datasheet:
-
W25N02KWTBIR.pdf
- Description:
- IC FLASH 2GBIT SPI/QUAD 24TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,151
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Product details
Overview
W25N02KWTBIR from Winbond Electronics is a 2Gb (256MB) serial NAND flash memory IC with SPI interface, 1.8V core voltage, 4KB page size, and 128KB block size, designed for embedded storage in space-constrained industrial and IoT applications requiring high-density nonvolatile data retention.
For engineers reviewing the W25N02KWTBIR datasheet, W25N02KWTBIR pinout, W25N02KWTBIR application, or W25N02KWTBIR equivalent, key selection considerations include its single-die 2Gb density, 1.8V VCC operation, ECC support via on-die controller, 4KB page programming time (typ. 800µs), and compatibility with standard SPI command sets including Read/Write/Erase and OTP lock functionality.
Technical Context
This device implements a serial NAND architecture with integrated ECC engine and wear-leveling logic, eliminating need for external ECC hardware. It supports standard SPI modes (0,3) and dual/quad I/O for accelerated data throughput up to 104MHz clock rate in QPI mode.
The W25N02KWTBIR uses a 24-pin WSON-8x6mm package with exposed thermal pad, and features hardware write protection via /WP pin, software write protection via status register bits, and OTP area for secure configuration storage. Its internal controller manages bad block management and read retry operations transparently.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Gb (256 MB) - provides high-capacity embedded storage in minimal PCB footprint |
| Interface | SPI-compatible serial NAND - enables simple 4-wire connection (CLK, CS#, DI, DO) with optional dual/quad I/O extension |
| Page Size | 4 KB - defines minimum programmable unit; impacts firmware partitioning and buffer sizing |
| Block Size | 128 KB (32 pages) - determines erase granularity and wear-leveling efficiency |
| VCC Supply | 1.7–1.95 V - low-voltage operation reduces system power consumption and heat generation |
| Max Clock Rate | 104 MHz in Quad I/O mode - enables up to 416 MB/s effective throughput for high-speed firmware updates |
| ECC Support | On-die BCH ECC (up to 8-bit correction per 512-byte sector) - eliminates need for host-side ECC logic |
Pinout & Package
W25N02KWTBIR is housed in an 8-pin WSON (8x6mm, 0.5mm pitch) package with exposed thermal pad (EP) for enhanced thermal dissipation in continuous write scenarios.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select | Active-low enable signal; must be asserted before any SPI command sequence |
| CLK | Clock Input | Drives all synchronous operations; supports up to 104 MHz in QPI mode |
| DI | Data Input | Serial input for commands, addresses, and data during write/program operations |
| DO | Data Output | Serial output for status, ID, and read data; tri-stated when /CS is high |
| /WP | Write Protect | Hardware lock for status register and OTP area; low = protected, high = enabled |
| /HOLD | Hold Input | Pauses ongoing read/write transfer without deselecting chip; improves bus arbitration |
| VCC | Power Supply | 1.8V core supply; requires local decoupling capacitor (100nF + 1µF) |
| GND | Ground | Reference return path; connected to EP for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ECC Engine | On-die BCH correction up to 8 bits per 512-byte sector - removes host CPU overhead and simplifies firmware design |
| OTP Memory Area | 1 KB one-time-programmable region - stores immutable device identifiers, calibration data, or security keys |
| Hardware Write Protection | Dedicated /WP pin controlling status register and OTP lock - prevents accidental reconfiguration in field-deployed units |
| Quad Peripheral Interface (QPI) | 4-line data bus enabling 4x bandwidth vs standard SPI - accelerates boot image loading and OTA firmware updates |
| Bad Block Management | Automatic detection and remapping of failing blocks - extends usable lifetime and ensures data integrity over 100K program/erase cycles |
| Read Retry Support | Configurable read voltage adjustment for marginal cells - maintains reliability under temperature/voltage stress or end-of-life conditions |
Applications
| Firmware Storage | Industrial Data Logging |
|---|---|
|
Use Scenario: Storing bootloader, OS kernel, and application binaries in edge gateways with limited PCB area. IC Role / Device Role: Primary nonvolatile code storage with direct XIP-capable read access and fast sequential read performance. Use Value: 2Gb density enables full Linux distribution storage; 104MHz QPI read speed reduces boot time by >35% vs parallel NOR alternatives. |
Use Scenario: Continuous timestamped sensor data capture in smart meters operating at -40°C to +85°C ambient. IC Role / Device Role: High-endurance cyclic logging medium with built-in wear leveling and ECC for long-term data fidelity. Use Value: 100K P/E cycles and on-die ECC ensure 10+ years of reliable operation without host-level error handling complexity. |
| Secure Configuration Storage | IoT Edge Device Boot Media |
|
Use Scenario: Storing cryptographic keys, device certificates, and factory-calibrated parameters in medical diagnostic equipment. IC Role / Device Role: Tamper-resistant OTP + write-protected register storage for immutable identity and security assets. Use Value: Hardware-enforced OTP locking prevents post-deployment key extraction; /WP pin adds physical layer protection against firmware rollback attacks. |
Use Scenario: Boot source for ARM Cortex-M7 microcontrollers in battery-powered asset trackers with aggressive power budget. IC Role / Device Role: Low-voltage (1.8V) serial NAND providing boot code and runtime overlay storage with minimal quiescent current. Use Value: 1.7–1.95V VCC range aligns with ultra-low-power SoC domains; 25µA deep power-down current extends battery life in sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NAND flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX35LF2GE4AB-TI | 2Gb density, 3.3V VCC, same 4KB page/128KB block, but lacks on-die ECC - requires host-based BCH implementation | Best suited for legacy 3.3V systems where voltage translation is undesirable and host has ECC capability | Select when migrating from older 3.3V platforms and ECC logic already exists in firmware stack |
| GD5F2GQ4UCYIGR | 2Gb density, 1.8V VCC, includes on-die ECC, but uses 2.5mm x 3mm USON-8 package - smaller footprint, lower thermal mass | Ideal for ultra-compact wearables or hearing aids where board space is constrained beyond WSON-8x6mm limits | Select when PCB real estate is critical and thermal load during sustained writes is managed externally |
Compared with MX35LF2GE4AB-TI and GD5F2GQ4UCYIGR, the W25N02KWTBIR uniquely balances 1.8V operation, integrated ECC, and industry-standard WSON-8x6mm packaging - making it optimal for new industrial designs prioritizing power efficiency, firmware simplicity, and supply chain familiarity.
Availability
W25N02KWTBIR is available at Aetrix Electronics and suitable for industrial control systems, IoT edge nodes, and medical diagnostics equipment requiring stable component supply across multi-year production lifecycles.
Supply support for W25N02KWTBIR 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, with leadership in serial flash, mobile DRAM, and code storage technologies since 1987.
The W25N series targets cost-sensitive, high-reliability embedded applications demanding scalable NAND density without complex controller integration - enabling rapid adoption in MCU-based systems.
FAQ
What is the maximum clock frequency supported by the W25N02KWTBIR in Quad I/O mode?
The W25N02KWTBIR supports up to 104 MHz in Quad Peripheral Interface (QPI) mode, delivering effective data rates of 416 MB/s. This timing is validated under 1.8V VCC and industrial temperature range (-40°C to +85°C). The W25N02KWTBIR requires proper signal integrity layout - including matched trace lengths and controlled impedance - to reliably sustain this clock rate in production systems.
Does the W25N02KWTBIR include built-in error correction, and how many bits can it correct per sector?
Yes, the W25N02KWTBIR integrates a BCH ECC engine capable of correcting up to 8 bits of error per 512-byte sector. This on-die ECC operates transparently during read operations and eliminates the need for host-side correction logic. The W25N02KWTBIR automatically applies correction and reports uncorrectable errors via status register bit SR[1], simplifying firmware development for robust data storage.
Can the W25N02KWTBIR be used as a direct replacement for parallel NOR flash in existing designs?
No, the W25N02KWTBIR is not a pin-compatible or functional drop-in replacement for parallel NOR flash due to fundamental architectural differences - it uses serial NAND protocol, requires block erase instead of byte-level erase, and relies on internal address translation. Migration to W25N02KWTBIR requires firmware adaptation for NAND-specific operations (bad block management, ECC handling, and wear leveling), though Winbond provides reference drivers to accelerate integration.
What is the purpose of the /HOLD pin on the W25N02KWTBIR, and how does it affect ongoing transfers?
The /HOLD pin on the W25N02KWTBIR pauses active read or write transfers without deselecting the device, preserving internal state and allowing other SPI peripherals to share the bus. When /HOLD is asserted low mid-transfer, the W25N02KWTBIR halts clock sampling and tri-states DO while maintaining command context. Resuming requires deasserting /HOLD and continuing CLK - no retransmission is needed. This feature is essential for deterministic real-time systems using shared SPI buses.
Is the OTP area of the W25N02KWTBIR truly one-time programmable, and what happens after programming?
Yes, the 1 KB OTP area in the W25N02KWTBIR is physically one-time programmable: once a bit is set from '1' to '0', it cannot be reset. After programming, the OTP region becomes permanently read-only; subsequent write attempts return status error. The W25N02KWTBIR supports OTP lock via status register bit SR[7], which - once set - disables further OTP writes globally. This ensures cryptographic keys or calibration data stored in the W25N02KWTBIR remain immutable throughout device life.
W25N02KWTBIR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 24-TBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NAND (SLC)
- Memory Size:
- 2Gbit
- Memory Organization:
- 256M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 700µs
- Access Time:
- 8 ns
- Voltage - Supply:
- 1.7V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TFBGA (8x6)
W25N02KWTBIR FAQ
1.How can I place an order for W25N02KWTBIR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25N02KWTBIR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W25N02KWTBIR reliable?
The price and inventory of W25N02KWTBIR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25N02KWTBIR is usually 5 days.
3.What payment methods are accepted for W25N02KWTBIR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25N02KWTBIR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25N02KWTBIR?
W25N02KWTBIR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25N02KWTBIR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W25N02KWTBIR?
For technical support, including W25N02KWTBIR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25N02KWTBIR requirements.
6.How does Aetrix verify that W25N02KWTBIR is sourced from the original manufacturer or authorized distributors?
All W25N02KWTBIR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W25N02KWTBIR meets industry standards.
7.What is the process for return or replacement of W25N02KWTBIR?
All W25N02KWTBIR units undergo pre-shipment inspection (PSI). If there is an issue with W25N02KWTBIR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W25N02KWTBIR part is unused and in its original packaging.
Return procedure for W25N02KWTBIR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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