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Winbond Electronics Corporation W25Q20EWSNIG TR
- Part No.:
- W25Q20EWSNIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q20EWSNIG TR.pdf
- Description:
- IC FLASH 2MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,399
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Product details
Overview
W25Q20EWSNIG TR from Winbond is a 2 M-bit (256 KB) serial NOR flash memory with 4 KB uniform sectors, supporting Standard/Dual/Quad SPI interfaces, 1.65–1.95 V single supply, and industrial temperature range (–40°C to +85°C). It enables XIP execution, code shadowing, and parameter storage in space-constrained embedded systems such as IoT edge nodes and MCU boot loaders.
For engineers reviewing the W25Q20EWSNIG TR datasheet, W25Q20EWSNIG TR pinout, W25Q20EWSNIG TR application, or W25Q20EWSNIG TR equivalent, this page delivers verified electrical specs, SOIC-8 (SN) package mapping, Quad SPI timing validation, sector/block erase architecture, and real-world security register behavior - all confirmed against Winbond's official Revision I datasheet (Aug 2017).
Technical Context
The W25Q20EWSNIG TR implements a SPI-compatible command set with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where Quad mode requires non-volatile QE bit (Status Register-2, bit 1) to be set. Its internal architecture includes a 256-byte page buffer, 64 × 4 KB sectors, eight 32 KB blocks, and four 64 KB blocks - enabling granular erase control for firmware partitioning and data logging.
Write protection combines hardware (/WP pin active-low during Standard/Dual SPI) and software (BP2–BP0, TB, SEC, CMP bits in Status Register-1), while Erase/Program Suspend (SUS bit) allows interrupt-driven background operations. The device supports JEDEC-standard SFDP (5Ah), 64-bit Unique ID (4Bh), and three 256-byte OTP-lockable Security Registers - all accessible via documented instructions without vendor-specific extensions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 M-bit (256 KB) organized as 1,024 × 256-byte pages |
| Supply Voltage | 1.65 V to 1.95 V - enables direct interface with 1.8 V logic families without level shifters |
| Max Clock Frequency | 104 MHz for Standard/Dual/Quad SPI - delivers up to 416 MHz effective throughput in Quad I/O mode |
| Erase Granularity | Uniform 4 KB sectors, plus 32 KB and 64 KB blocks - supports firmware OTA updates with minimal wasted space |
| Endurance & Retention | 100,000 program/erase cycles per sector; 20+ years data retention at 85°C |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics |
| Power Consumption | 1 mA typical active current; <1 µA in power-down - suitable for battery-backed sensor nodes |
Pinout & Package
W25Q20EWSNIG TR uses an 8-pin SOIC-150-mil package (package code SN), with pin 1 marked by a notch or dot. All pins are electrically identical across SOIC, VSOP, and USON variants per Winbond's pin description table.
| 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/O | Unidirectional output in Standard SPI; becomes IO1 in Dual/Quad modes - used for read data and status |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware write lock for Status Register when QE=0; repurposed as IO2 in Quad mode (QE=1) |
| 4 GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB connection to minimize noise |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; becomes IO0 in Dual/Quad modes - carries instructions, addresses, and write data |
| 6 CLK | Serial Clock Input | Edge-triggered timing source; supports SPI Modes 0 and 3; max 104 MHz frequency defines system bandwidth ceiling |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing SPI transaction when active-low; disabled in Quad mode (repurposed as IO3); critical for multi-device bus sharing |
| 8 VCC | Power Supply | 1.65–1.95 V nominal; internal voltage regulators stabilize core logic and charge pumps for erase/program operations |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI Support | Enables 416 MHz effective read throughput via EBh (Fast Read Quad I/O), accelerating boot time and firmware loading |
| Erase/Program Suspend | SUS bit allows pausing long erase/program operations to service interrupts - essential for real-time deterministic response |
| Security Registers | Three 256-byte OTP-lockable registers store cryptographic keys or calibration data immune to field reprogramming |
| JEDEC SFDP Compliance | 5Ah instruction returns standardized parameter table - enables automatic configuration by modern boot ROMs and flash tools |
| Unique 64-bit ID | 4Bh instruction reads factory-programmed serial number - supports device authentication and secure provisioning |
Applications
| MCU Boot Memory | Firmware Update Storage |
|---|---|
|
Use Scenario: Stores boot code for ARM Cortex-M or RISC-V microcontrollers that execute-in-place (XIP) directly from flash. IC Role / Device Role / Timing Role: Primary non-volatile code storage with Quad SPI interface providing deterministic 104 MHz clock-aligned instruction fetch. Use Value: Eliminates external RAM copy step during boot; 4 KB sector granularity allows safe dual-bank OTA updates without full chip erase. |
Use Scenario: Holds compressed firmware images and delta patches in smart home hubs and industrial gateways. IC Role / Device Role / Timing Role: Parameter and image repository with hardware write protection (/WP pin + BP bits) preventing corruption during power loss. Use Value: 100K endurance ensures >10 years of daily updates; SUS bit enables atomic patch application under RTOS scheduling. |
| IoT Sensor Data Logging | Automotive Body Control |
|
Use Scenario: Logs timestamped environmental readings (temperature, humidity) in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Low-power data sink using <1 µA power-down mode between 10-minute sampling intervals. Use Value: 4 KB sectors align with log file boundaries; 20-year retention guarantees data integrity over product lifetime. |
Use Scenario: Stores configuration profiles (lighting presets, seat positions) and diagnostic event logs in vehicle ECUs. IC Role / Device Role / Timing Role: Industrial-temp qualified storage interfacing with CAN-connected microcontrollers via SPI bridge ICs. Use Value: –40°C to +85°C operation meets AEC-Q100 Grade 3 requirements; SFDP support simplifies bootloader compatibility across ECU variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L2006EM1I-12G | 2 M-bit, 1.65–2.0 V, SOIC-8, but only supports Standard/Dual SPI (no Quad I/O or QE bit) | Lacks Quad SPI performance and SFDP register; no 64-bit UID or Security Registers | Choose if design uses only Standard/Dual SPI and requires lower cost; verify bootloader supports MXIC command set |
| AT25SF021-SSHD-B | 2 M-bit, 1.7–2.0 V, SOIC-8, supports Quad SPI and SFDP, but no Erase/Program Suspend or Security Registers | Missing SUS bit limits real-time responsiveness; no OTP-locked key storage for secure boot | Prefer when SFDP and Quad I/O are required but suspend/resume and crypto key isolation are not needed |
Compared with W25Q20EWSNIG TR, MX25L2006EM1I-12G offers lower cost but sacrifices Quad SPI speed and security features, while AT25SF021-SSHD-B matches Quad/SFDP capability but lacks suspend/resume and OTP-protected registers - making W25Q20EWSNIG TR the only option supporting full XIP, secure key storage, and deterministic interrupt handling in one package.
Availability
W25Q20EWSNIG TR is available at Aetrix Electronics and suitable for MCU boot memory, firmware update storage, IoT sensor data logging, automotive body control, and industrial HMI applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for W25Q20EWSNIG 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 serial NOR/NAND flash, RAM, and mobile DRAM.
The W25Q20EWSNIG TR belongs to Winbond's W25Q20EW family - designed specifically for embedded systems needing high-speed, low-voltage, and secure code/data storage with flexible erase architecture and industrial temperature reliability.
FAQ
What is the maximum SPI clock frequency supported by the W25Q20EWSNIG TR?
The W25Q20EWSNIG TR supports up to 104 MHz for Standard, Dual, and Quad SPI operations. In Quad I/O mode using instruction EBh (Fast Read Quad I/O), this yields an effective throughput of 416 MHz (104 MHz × 4 lines), validated per AC Electrical Characteristics Table 9.6 in Winbond's Revision I datasheet. This frequency is achievable under 1.65–1.95 V supply and industrial temperature conditions with proper signal integrity layout.
Does the W25Q20EWSNIG TR support Execute-in-Place (XIP) operation?
Yes, the W25Q20EWSNIG TR supports XIP via Dual and Quad SPI interfaces. Its Fast Read Dual I/O (BBh) and Fast Read Quad I/O (EBh) instructions enable high-bandwidth instruction fetch directly from flash, eliminating the need for RAM copy during boot. XIP functionality requires the Quad Enable (QE) bit in Status Register-2 to be set for Quad mode, and is explicitly cited in Winbond's General Description section as ideal for "executing code directly from Dual/Quad SPI (XIP)."
How is hardware write protection implemented on the W25Q20EWSNIG TR?
Hardware write protection on the W25Q20EWSNIG TR uses the /WP pin (Pin 3), which is active-low and functional only in Standard and Dual SPI modes (QE = 0). When /WP is held low, writes to the Status Register are blocked - preventing accidental changes to block protection bits (BP2–BP0) or Quad Enable. This complements software protection via Status Register bits and is detailed in Section 7.2.1 and Pin Description 5.3 of the official datasheet.
What package type does the W25Q20EWSNIG TR use, and is it compatible with standard SOIC-8 footprints?
The W25Q20EWSNIG TR uses an 8-pin SOIC-150-mil package (package code SN), matching industry-standard SOIC-8 land patterns with 1.27 mm pitch and 3.9 mm body width. It is pin- and footprint-compatible with other SOIC-8 serial flash devices, including legacy W25Q20CL and competing parts - confirmed by Winbond's Package Specification section (10.1) and mechanical drawings in the datasheet.
Can the W25Q20EWSNIG TR store unique device identifiers for secure provisioning?
Yes, the W25Q20EWSNIG TR includes a factory-programmed 64-bit Unique ID accessible via instruction 4Bh (Read Unique ID Number), as specified in Section 8.3.26 of the datasheet. This immutable identifier supports secure device onboarding, cryptographic key binding, and anti-cloning measures - distinct from user-programmable memory and independent of the main array's endurance rating.
W25Q20EWSNIG TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
W25Q20EWSNIG TR FAQ
1.How can I place an order for W25Q20EWSNIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q20EWSNIG 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 W25Q20EWSNIG TR reliable?
The price and inventory of W25Q20EWSNIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q20EWSNIG TR is usually 5 days.
3.What payment methods are accepted for W25Q20EWSNIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q20EWSNIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q20EWSNIG TR?
W25Q20EWSNIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q20EWSNIG 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 W25Q20EWSNIG TR?
For technical support, including W25Q20EWSNIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q20EWSNIG TR requirements.
6.How does Aetrix verify that W25Q20EWSNIG TR is sourced from the original manufacturer or authorized distributors?
All W25Q20EWSNIG 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 W25Q20EWSNIG TR meets industry standards.
7.What is the process for return or replacement of W25Q20EWSNIG TR?
All W25Q20EWSNIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q20EWSNIG 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 W25Q20EWSNIG TR part is unused and in its original packaging.
Return procedure for W25Q20EWSNIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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