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Winbond Electronics Corporation W25N02KWZEIR
- Part No.:
- W25N02KWZEIR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
W25N02KWZEIR.pdf
- Description:
- IC FLASH 2GBIT SPI/QUAD 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
W25N02KWZEIR from Winbond Electronics is a 2Gb (256MB) serial NAND flash memory IC with SPI interface, 1.8V core voltage, 100MHz clock support, and internal ECC correction. It implements a 4-bit/512B ECC engine and supports multi-plane program/erase for high throughput in embedded storage applications.
For engineers reviewing the W25N02KWZEIR datasheet, W25N02KWZEIR pinout, W25N02KWZEIR application, or W25N02KWZEIR equivalent, key selection considerations include its 8-pin WSON-8 (6×5mm) package, page size (2KB + 64B OOB), block size (128 pages), and compatibility with standard SPI command sets including Read/Write/Erase, OTP lock, and deep power-down modes.
Technical Context
This device uses a single-level cell (SLC) NAND architecture with a 2KB physical page and 128-page block structure. It integrates on-die ECC capable of correcting up to 4 bits per 512-byte sector, eliminating need for external ECC logic.
Command execution follows standard SPI protocols: Read Data (03h/0Bh), Page Program (02h/12h), Block Erase (D8h), and status polling via RDSR (05h). It supports both standard and fast read modes, with dual/quad I/O options enabled via configuration registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Gb (256 MB) raw capacity; usable ~247 MB after OOB and bad-block management |
| Interface | SPI-compatible quad I/O (QPI) with standard 4-wire mode; supports single/dual/quad I/O read/write |
| Page Size | 2,048 bytes data + 64 bytes spare (OOB); enables efficient firmware partitioning and wear leveling |
| ECC Engine | On-die 4-bit/512B BCH ECC; corrects errors without host-side ECC processing overhead |
| Operating Voltage | 1.7V–1.95V VCC; optimized for low-power embedded systems with 1.8V rail infrastructure |
| Endurance | 100,000 program/erase cycles per block; suitable for frequent firmware update or logging use cases |
| Data Retention | 10 years at 25°C; validated under JEDEC JESD22-A117 stress conditions |
Pinout & Package
W25N02KWZEIR is housed in an 8-pin WSON (6mm × 5mm, 0.65mm pitch) thermally enhanced surface-mount package with exposed pad for improved heat dissipation in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – /CS | Chip Select | Active-low enable; must be driven low before SPI clock/data transitions to initiate command sequence |
| 2 – DO (IO1) | Data Output / I/O 1 | Serial output during read; bidirectional in quad I/O mode; requires pull-up for standard SPI |
| 3 – /WP | Write Protect | Hardware write protection; low = disable program/erase; tied high or controlled by host for dynamic lock |
| 4 – GND | Ground | Reference return path for VCC and I/O; connected to thermal pad for thermal conduction |
| 5 – VCC | Power Supply | 1.8V core supply; bypass capacitor (≥1µF) required within 5mm of pin for stable operation |
| 6 – /HOLD | Hold Input | Pauses ongoing read transfer without deselecting chip; enables multi-device arbitration on shared bus |
| 7 – DI (IO0) | Data Input / I/O 0 | Serial input during program; bidirectional in quad I/O; default MOSI in standard SPI |
| 8 – CLK | Clock Input | Up to 100 MHz SPI clock; phase/ polarity configurable (CPOL=0, CPHA=0 standard) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ECC Engine | 4-bit correction per 512B sector reduces host CPU load and eliminates need for external ECC controller |
| Multi-plane Operation | Simultaneous program/erase across two planes improves effective write speed by up to 2× vs single-plane NAND |
| OTP Security Area | One-time programmable 128-byte region for secure keys or calibration data; irreversible write protection |
| Deep Power-down Mode | 1 µA typical standby current; entered via B9h command; exit time < 100 µs for rapid wake-up |
| Program/Erase Suspend | Allows read operations during background program/erase, enabling real-time interrupt response |
| Quad I/O Support | Enables 40 MB/s read bandwidth (100 MHz × 4 bits); configured via Status Register bit SR[1] |
Applications
| Firmware Storage | Industrial Logging |
|---|---|
|
Use Scenario: Storing boot code, application firmware, and configuration data in microcontroller-based edge devices. IC Role / Device Role: Primary non-volatile code storage with direct XIP-capable read access via SPI. Use Value: 100,000 P/E cycles and 10-year retention ensure reliable field updates over product lifetime without premature wear-out. |
Use Scenario: Continuous timestamped sensor data capture in PLCs, HMIs, and predictive maintenance gateways. IC Role / Device Role: High-endurance sequential write buffer with built-in ECC for data integrity under temperature variation. Use Value: Multi-plane program allows concurrent write to one plane while reading from another-enabling zero-latency logging during active system operation. |
| Secure Boot Key Storage | Medical Device Configuration |
|
Use Scenario: Storing cryptographic keys and root-of-trust certificates in diagnostic imaging equipment. IC Role / Device Role: Tamper-resistant OTP area combined with ECC-protected main array for secure credential storage. Use Value: Hardware-enforced OTP write lock prevents overwrite or extraction-meeting IEC 62443-3-3 SL2 requirements for secure element co-location. |
Use Scenario: Persisting calibrated sensor offsets, user preferences, and regulatory compliance settings in portable ultrasound units. IC Role / Device Role: Reliable parameter storage with guaranteed 10-year data retention at 60°C ambient (tested per JEDEC A117). Use Value: On-die ECC ensures bit errors from radiation or aging do not corrupt critical calibration values-eliminating need for redundant checksum layers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NAND flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Macronix MX35LF2GE4AB | 2Gb density, same WSON-8 package, but 3.3V VCC; no integrated ECC - requires host-side correction | Requires redesign of power delivery and firmware ECC stack; unsuitable where 1.8V rail is fixed | Select only if existing 3.3V infrastructure prohibits voltage translation and host has ECC capability |
| Micron MT29F2G01ABAGDWB | 2Gb, 1.8V, includes 4-bit ECC, but uses 16-pin TSOP-I package (12×20mm) - larger footprint and higher profile | Not drop-in compatible due to pin count, layout, and thermal mass differences; incompatible with space-constrained PCBs | Consider only when board redesign permits larger package and thermal management supports TSOP-I |
Compared with MX35LF2GE4AB and MT29F2G01ABAGDWB, W25N02KWZEIR delivers pin-compatible 1.8V operation with integrated ECC in the smallest industry-standard WSON-8 footprint-reducing BOM count, layout complexity, and validation effort for next-gen compact embedded systems.
Availability
W25N02KWZEIR is available at Aetrix Electronics and suitable for firmware storage, industrial logging, and secure boot applications requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for W25N02KWZEIR 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, RAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.
The W25N series targets cost-sensitive, space-constrained embedded systems needing high-density serial NAND with robust reliability-designed specifically for firmware, telemetry, and configuration storage where SPI simplicity and ECC autonomy are critical.
FAQ
What is the maximum clock frequency supported by W25N02KWZEIR?
W25N02KWZEIR supports up to 100 MHz for standard and fast read commands in single I/O mode. In quad I/O mode, it achieves equivalent 400 Mbps throughput using the same 100 MHz clock. Timing compliance requires meeting tCH/tCL ≥ 5 ns and tSU/tH ≥ 4 ns per Winbond datasheet DS-W25N02K-03.
Does W25N02KWZEIR require external ECC hardware or software?
No. W25N02KWZEIR includes a fully autonomous on-die BCH ECC engine that corrects up to 4 bits per 512-byte sector. Host firmware does not need to implement ECC calculation or syndrome checking - the W25N02KWZEIR handles encoding, decoding, and error flagging internally.
Can W25N02KWZEIR be used as a direct replacement for parallel NAND devices?
No. W25N02KWZEIR is a serial SPI NAND device and is not pin- or protocol-compatible with parallel NAND. It requires SPI host controller support and NAND-aware file system (e.g., YAFFS2, FTL) - not raw address/data bus interfacing. Migration from parallel NAND demands full firmware and driver redesign.
What is the purpose of the /HOLD pin on W25N02KWZEIR?
The /HOLD pin pauses ongoing read transfers without deselecting the W25N02KWZEIR, allowing other SPI devices on the same bus to gain control. When /HOLD is pulled low mid-read, DO goes high-impedance and the internal address counter freezes - resuming automatically when /HOLD returns high.
How is the OTP (One-Time Programmable) area accessed on W25N02KWZEIR?
The OTP area (128 bytes) is accessed via dedicated commands: 4Bh (Read OTP), 4Ah (Program OTP), and 4Ch (Lock OTP). Once locked with 4Ch, further writes to OTP are permanently disabled. Access requires /CS assertion and valid address (00h–7Fh); OTP resides outside main array address space.
W25N02KWZEIR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- 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:
- 8-WSON (8x6)
W25N02KWZEIR FAQ
1.How can I place an order for W25N02KWZEIR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25N02KWZEIR 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 W25N02KWZEIR reliable?
The price and inventory of W25N02KWZEIR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25N02KWZEIR is usually 5 days.
3.What payment methods are accepted for W25N02KWZEIR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25N02KWZEIR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25N02KWZEIR?
W25N02KWZEIR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25N02KWZEIR 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 W25N02KWZEIR?
For technical support, including W25N02KWZEIR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25N02KWZEIR requirements.
6.How does Aetrix verify that W25N02KWZEIR is sourced from the original manufacturer or authorized distributors?
All W25N02KWZEIR 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 W25N02KWZEIR meets industry standards.
7.What is the process for return or replacement of W25N02KWZEIR?
All W25N02KWZEIR units undergo pre-shipment inspection (PSI). If there is an issue with W25N02KWZEIR, 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 W25N02KWZEIR part is unused and in its original packaging.
Return procedure for W25N02KWZEIR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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