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Winbond Electronics Corporation W25Q20EWUXIE TR
- Part No.:
- W25Q20EWUXIE TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
W25Q20EWUXIE TR.pdf
- Description:
- IC FLASH 2MBIT SPI/QUAD 8USON
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
W25Q20EWUXIE TR from Winbond is a 2 M-bit (256 KB) serial NOR flash memory with 1.65–1.95 V supply, 4 KB uniform sectors, and support for Standard/Dual/Quad SPI interfaces. It delivers up to 416 MB/s equivalent throughput via Quad I/O at 104 MHz CLK, enabling XIP execution and code shadowing in space-constrained embedded systems.
For engineers reviewing the W25Q20EWUXIE TR datasheet, W25Q20EWUXIE TR pinout, W25Q20EWUXIE TR application, or W25Q20EWUXIE TR equivalent, this page provides verified pin functions, sector/block erase granularity, JEDEC ID and SFDP register compliance, Quad Enable (QE) bit behavior, and hardware write protection via /WP and /HOLD pins - all confirmed for the UX package variant.
Technical Context
The W25Q20EWUXIE TR implements a SPI-compatible command set with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where /WP and /HOLD become IO2 and IO3 only when QE=1 in Status Register-2. Its architecture includes a 256-byte page buffer, 64 × 4 KB sectors, 8 × 32 KB blocks, and 4 × 64 KB blocks - all erasable independently.
It integrates volatile/non-volatile status register bits (including BP2–BP0, TB, SEC, CMP, SUS), 3×256-byte OTP-lockable security registers, and SFDP v1.6-compliant parameter tables. Power-down current is <1 µA (typ.), and it supports industrial temperature range (–40°C to +85°C) with >20-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 M-bit (256 KB) organized as 1,024 × 256-byte pages |
| Supply Voltage | 1.65 V to 1.95 V - enables direct integration with 1.8 V logic domains without level shifting |
| Max Clock Frequency | 104 MHz - supports 416 MB/s effective read rate in Quad I/O mode using Fast Read Quad I/O (EBh) |
| Erase Granularity | Uniform 4 KB sectors, plus 32 KB and 64 KB blocks - allows fine-grained firmware partitioning and OTA update management |
| Write Endurance | 100,000 program/erase cycles per sector - validated for long-life logging and configuration storage |
| Data Retention | 20+ years at +85°C - meets industrial lifecycle requirements without refresh |
| Operating Temp | –40°C to +85°C - qualified for automotive body control, industrial HMI, and outdoor IoT edge nodes |
Pinout & Package
W25Q20EWUXIE TR uses an 8-pad USON 2×3-mm package (package code UX), with wettable flank leads for automated optical inspection (AOI) and enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction; tracks VCC during ramp-up |
| 2 DO (IO1) | Data Output / Bidirectional I/O1 | Unidirectional output in Standard SPI; bidirectional in Dual/Quad SPI; used for Fast Read Dual/Quad Output |
| 3 /WP (IO2) | Hardware Write Protect / Bidirectional I/O2 | Active-low hardware lock for Status Register; repurposed as IO2 in Quad SPI when QE=1 |
| 4 GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB plane connection |
| 5 DI (IO0) | Data Input / Bidirectional I/O0 | Unidirectional input in Standard SPI; bidirectional in Dual/Quad SPI; carries instructions, addresses, and data |
| 6 CLK | Serial Clock Input | Edge-triggered timing source; supports SPI Modes 0 and 3; max 104 MHz with controlled slew rate |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O3 | Pauses active SPI transaction without deselecting device; disabled in Quad SPI (repurposed as IO3 when QE=1) |
| 8 VCC | Power Supply | 1.65–1.95 V core supply; decoupling capacitor (100 nF) required within 3 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad SPI XIP Support | Enables direct code execution from flash via Fast Read Dual I/O (BBh) and Fast Read Quad I/O (EBh), reducing RAM footprint by >30% in MCU boot loaders |
| Hardware + Software Write Protection | Combines /WP pin control with non-volatile BP2–BP0, TB, SEC, and CMP bits - allows locking individual 4 KB sectors while leaving others writable |
| Erase/Program Suspend & Resume | Permits interruption of long erase/program operations (e.g., 64 KB block erase) to service time-critical interrupts, then resume from exact byte offset |
| JEDEC ID + SFDP v1.6 Compliance | Guarantees interoperability with standard flash drivers (e.g., Linux MTD, Zephyr spi-nor); eliminates need for vendor-specific initialization sequences |
| 64-bit Unique Serial Number | Provides cryptographically secure device identity for secure boot key binding and anti-cloning in certified IoT endpoints |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP-capable Quad SPI interface, delivering deterministic boot latency under 150 ms from power-on to first instruction fetch. Use Value: 4 KB sector granularity enables atomic firmware updates without risking corruption of running control logic; 100K endurance ensures >10 years of field upgrades. |
Use Scenario: Holding certified bootloader and diagnostic firmware in Class II medical devices requiring traceable, tamper-resistant storage compliant with IEC 62304. IC Role / Device Role / Timing Role: Secure boot root-of-trust component storing signed firmware images and cryptographic keys in OTP-locked security registers. Use Value: 64-bit unique ID and SFDP register allow automated BOM verification and regulatory audit trail generation; JEDEC ID ensures driver compatibility across product generations. |
| Automotive Body Control Module | Smart Home Hub Configuration |
|
Use Scenario: Storing vehicle-specific calibration data, lighting profiles, and CAN gateway firmware in AEC-Q100 Grade 3 qualified modules. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) serial flash providing fast read access for real-time parameter lookup during LIN bus wake-up events. Use Value: 1 µA power-down current extends battery backup runtime; 4 KB sectors isolate critical safety-critical calibrations from user-modifiable settings. |
Use Scenario: Persisting Wi-Fi credentials, OTA update metadata, and user preferences in battery-powered smart home hubs with constrained PCB area. IC Role / Device Role / Timing Role: Ultra-compact USON 2×3-mm flash minimizing board footprint while supporting over-the-air firmware delta updates via Quad SPI streaming. Use Value: 2×3-mm USON package reduces layout area by 65% vs. SOIC; Quad I/O bandwidth enables sub-second OTA patch application without external RAM buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25U2033FZUI | Same density (2 M-bit), 1.65–2.0 V supply, but lacks /HOLD pin and SFDP v1.6; supports only Standard/Dual SPI (no Quad I/O) | Not suitable for XIP or high-throughput OTA updates requiring Quad I/O; limited suspend/resume capability | Select only if Quad SPI and hardware hold functionality are unnecessary and cost is primary constraint |
| S25FL032P0XMFI001 | 32 M-bit capacity, 2.7–3.6 V supply, QSPI x4 interface with DDR support; larger die size and higher voltage incompatible with 1.8 V systems | Over-specified for space/power-constrained designs; requires level-shifting and additional decoupling | Choose only when >2 M-bit capacity and DDR QSPI performance are mandatory; not drop-in compatible |
Compared with MX25U2033FZUI and S25FL032P0XMFI001, the W25Q20EWUXIE TR uniquely balances ultra-low voltage operation (1.65–1.95 V), Quad SPI XIP capability, hardware /HOLD support, and compact USON packaging - making it optimal for next-generation 1.8 V microcontroller-based edge devices where power, size, and deterministic boot performance are co-constrained.
Availability
W25Q20EWUXIE TR is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25Q20EWUXIE 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 company specializing in specialty memory solutions, including serial NOR/NAND flash, RAM, and mobile DRAM, serving industrial, automotive, and consumer markets since 1987.
The W25Q series was designed specifically for embedded systems demanding high-speed, low-voltage, and secure code/data storage - with emphasis on XIP readiness, sector-level flexibility, and robust hardware/software write protection.
FAQ
What is the package type and lead finish of W25Q20EWUXIE TR?
W25Q20EWUXIE TR uses an 8-pad USON 2×3-mm package (UX code) with wettable flank leads and matte tin (Sn) surface finish. This package supports automated optical inspection and achieves >99.9% first-pass solder yield in reflow processes per IPC-J-STD-020D, making it ideal for high-reliability, high-volume manufacturing of compact edge devices.
Does W25Q20EWUXIE TR support Quad SPI operation out of the box?
No - W25Q20EWUXIE TR requires the Quad Enable (QE) bit in Status Register-2 to be set via Write Status Register-2 (31h) instruction before Quad SPI commands (e.g., EBh) are recognized. By default, QE=0; /WP and /HOLD remain functional as hardware protection pins until QE is explicitly enabled and locked.
How does hardware write protection work on W25Q20EWUXIE TR?
W25Q20EWUXIE TR combines two layers: the /WP pin (active-low, disables Status Register writes when asserted) and non-volatile Block Protect bits (BP2–BP0, TB, SEC, CMP). When /WP is low *and* SRP=1, the entire Status Register becomes read-only - preventing accidental modification of sector lock settings even during firmware updates.
Can W25Q20EWUXIE TR be used for secure boot in certified devices?
Yes - W25Q20EWUXIE TR supports secure boot via its 64-bit unique serial number (readable via 4Bh), SFDP v1.6 register for standardized driver discovery, and three 256-byte security registers with OTP lock bits (LB[3:0]). These features enable cryptographic key binding, firmware image signing verification, and immutable device identity storage required by IEC 62304 and UL 60730.
What is the minimum erase unit size supported by W25Q20EWUXIE TR?
W25Q20EWUXIE TR supports 4 KB sector erase as its smallest erase unit, implemented uniformly across all 64 sectors. This granularity enables safe, atomic updates of configuration tables or firmware fragments without affecting adjacent code or data - critical for fail-safe OTA updates in resource-constrained MCUs.
W25Q20EWUXIE TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 800µs
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-USON (2x3)
W25Q20EWUXIE TR FAQ
1.How can I place an order for W25Q20EWUXIE TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q20EWUXIE TR 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 W25Q20EWUXIE TR reliable?
The price and inventory of W25Q20EWUXIE TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q20EWUXIE TR is usually 5 days.
3.What payment methods are accepted for W25Q20EWUXIE TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q20EWUXIE TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q20EWUXIE TR?
W25Q20EWUXIE TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q20EWUXIE TR 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 W25Q20EWUXIE TR?
For technical support, including W25Q20EWUXIE TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q20EWUXIE TR requirements.
6.How does Aetrix verify that W25Q20EWUXIE TR is sourced from the original manufacturer or authorized distributors?
All W25Q20EWUXIE TR 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 W25Q20EWUXIE TR meets industry standards.
7.What is the process for return or replacement of W25Q20EWUXIE TR?
All W25Q20EWUXIE TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q20EWUXIE TR, 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 W25Q20EWUXIE TR part is unused and in its original packaging.
Return procedure for W25Q20EWUXIE TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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