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Winbond Electronics Corporation W25Q40EWSNIG TR
- Part No.:
- W25Q40EWSNIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q40EWSNIG TR.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
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Product details
Overview
W25Q40EWSNIG TR from Winbond is a 4 Mbit (512 KB) 1.8 V serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 2,048 × 256-byte pages with uniform 4 KB sector erase, 32 KB/64 KB block erase, and chip erase. It delivers up to 416 MHz equivalent data throughput via Quad I/O Fast Read (EBh), operates at 1.65–1.95 V, draws 1 mA active and <1 µA power-down current, and targets embedded code storage and XIP in space-constrained IoT and portable electronics.
For engineers reviewing the W25Q40EWSNIG TR datasheet, W25Q40EWSNIG TR pinout, W25Q40EWSNIG TR application, or W25Q40EWSNIG TR equivalent, key selection considerations include its 8-pin SOIC 150-mil (SN) package, Quad Enable (QE) bit dependency for IO2/IO3 functionality, JEDEC ID 0xEF4013 support, 64-bit unique serial number, and SFDP register compliance for auto-configuration in boot loaders.
Technical Context
The W25Q40EWSNIG TR implements a quad-peripheral interface (QPI) mode entered via 38h instruction, reducing instruction overhead to two clock cycles by using all four IO pins simultaneously - distinct from standard SPI's eight-cycle instruction load. Its dual-mode /WP and /HOLD pins function as IO2 and IO3 only when Status Register-2's non-volatile QE bit is set; otherwise, they retain hardware write-protection and hold control.
It supports Erase/Program Suspend & Resume (75h/7Ah), enabling background operations to pause during high-priority interrupts, and integrates three 256-byte security registers with OTP lock bits (LB[3:0]) for firmware integrity protection. The device uses internal high-voltage generators for program/erase without external VPP, and features volatile/non-volatile status register bits including BUSY, WEL, BP2–BP0, TB, SEC, CMP, SRP, and SUS flags.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KB), organized as 2,048 × 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 SPI; 208 MHz Dual I/O; 416 MHz Quad I/O - enables 50 MB/s continuous read throughput |
| Erase Granularity | Uniform 4 KB sectors (128 total), 32 KB blocks (8), 64 KB blocks (8), and full-chip erase - supports fine-grained firmware updates |
| Endurance & Retention | 100,000 program-erase cycles per sector; >20 years data retention at +25°C - suitable for field-upgradable embedded systems |
| Interface Modes | Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), QPI (all 4 IOs) - requires QE=1 for Quad/QPI operation |
| Unique Identifier | 64-bit factory-programmed serial number - enables secure device authentication and anti-cloning |
| Security Features | 3×256-byte OTP-lockable security registers, software/hardware write-protect, SFDP register - supports secure boot and parameter locking |
Pinout & Package
W25Q40EWSNIG TR is packaged in an 8-pin SOIC 150-mil (package code SN), with lead-free, RoHS-compliant construction and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before accepting instructions; controls DO high-impedance state |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional IO1 in Dual/Quad/QPI modes; used for status/data reads on CLK falling edge |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware write-protection of status register when QE=0; becomes IO2 in Quad/QPI modes when QE=1 |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; requires low-impedance PCB connection |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional IO0 in Dual/Quad/QPI modes; accepts instructions/addresses on CLK rising edge |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports SPI modes 0 and 3; determines data sampling edges for all I/O operations |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing operation while /CS is low when QE=0; becomes IO3 in Quad/QPI modes when QE=1 |
| 8 VCC | Power Supply | 1.65–1.95 V supply; internal regulators derive programming voltages - no external VPP required |
Key Features
| Feature | Design Value |
|---|---|
| Quad Enable (QE) Bit | Non-volatile Status Register-2 bit controlling /WP and /HOLD pin reassignment to IO2/IO3 - essential for Quad/QPI mode activation |
| Erase/Program Suspend | 75h/7Ah instructions allow pausing active erase/program cycles to service interrupts - preserves page buffer state without data loss |
| Discoverable Parameters (SFDP) | Standardized JEDEC SFDP register (5Ah) provides auto-configurable timing, voltage, and command-set parameters for bootloader compatibility |
| Top/Bottom Block Protection | Configurable TB bit + BP2–BP0 bits enable hardware write-protection of upper/lower memory segments - prevents accidental firmware overwrite |
| 64-Bit Unique Serial Number | Factory-programmed, read-only identifier (4Bh) - enables device-specific licensing, traceability, and secure provisioning in production |
| Security Register Lock Bits | LB[3:0] OTP bits permanently lock 3×256-byte security registers - protects cryptographic keys or calibration data from runtime modification |
Applications
| Wireless Sensor Node Firmware Storage | Industrial HMI Code Execution (XIP) |
|---|---|
Use Scenario: Storing firmware images and sensor calibration tables in battery-powered Zigbee/Bluetooth LE nodes with strict power budgets. IC Role / Device Role / Timing Role: Non-volatile code and parameter storage with ultra-low 1 µA power-down current and fast wake-up read capability. Use Value: Enables multi-year battery life via deep-sleep retention and eliminates need for external RAM shadowing due to 104 MHz SPI performance. | Use Scenario: Executing GUI logic and real-time control code directly from flash on ARM Cortex-M7-based HMIs without external RAM loading. IC Role / Device Role / Timing Role: XIP-capable serial NOR flash delivering 50 MB/s continuous read throughput via Quad I/O Fast Read (EBh). Use Value: Reduces BOM cost and PCB area by eliminating parallel NOR flash and associated address/data bus traces. |
| Medical Wearable Bootloader Storage | Automotive Telematics Secure Parameter Vault |
Use Scenario: Hosting certified bootloader and secure boot manifest in FDA-class II wearable devices requiring tamper-resistant firmware validation. IC Role / Device Role / Timing Role: Trusted storage for signed boot images and public key certificates using OTP-locked security registers. Use Value: Prevents unauthorized firmware updates via LB[3:0]-protected registers and 64-bit unique ID binding to device identity. | Use Scenario: Storing vehicle-specific configuration, OTA update metadata, and CAN message routing tables in telematics control units. IC Role / Device Role / Timing Role: High-reliability parameter storage with 100K-cycle endurance and -40°C to +85°C operation across automotive temperature zones. Use Value: Ensures consistent behavior over 15+ year vehicle lifetimes with guaranteed >20-year data retention at end-of-life conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EWBYIG TR | Same die, 8-ball WLCSP (BY) package - 2.1 × 2.1 mm, bottom-terminal, requires microvia PCB design | Targeted at ultra-compact wearables and hearing aids where SOIC footprint is prohibitive | Select W25Q40EWSNIG TR for standard SMT assembly; choose W25Q40EWBYIG TR only if board space is constrained below 12 mm² and reflow profile supports WLCSP. |
| Micron MT25QL04AAB8E12-0SIT TR | 4 Mbit, 1.8 V, supports DTR Quad SPI and octal DDR; higher pin count (16-pin SOIC/WSON); different SFDP layout and QE implementation | Designed for high-speed boot from FPGA or application processors requiring double-data-rate interfaces | W25Q40EWSNIG TR is preferred for cost-sensitive MCU-based designs with legacy SPI controllers; MT25QL04AAB8E12-0SIT suits advanced SoC platforms needing DTR or enhanced security options. |
Compared with W25Q40EWBYIG TR, W25Q40EWSNIG TR offers plug-and-play compatibility with standard SOIC footprints and simplified thermal management, while differing from MT25QL04AAB8E12-0SIT in interface flexibility - the latter adds DTR and octal modes but increases layout complexity and cost for applications not requiring >66 MHz sustained bandwidth.
Availability
W25Q40EWSNIG TR is available at Aetrix Electronics and suitable for wireless sensor nodes, industrial HMIs, medical wearables, automotive telematics, and consumer IoT gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for W25Q40EWSNIG 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 DRAM, mobile DRAM, and serial flash memory solutions since 1987.
The W25Q series is designed specifically for embedded code storage and execute-in-place (XIP) applications in resource-constrained microcontroller systems, emphasizing low-voltage operation, high-speed Quad I/O, and robust security features for firmware integrity.
FAQ
What is the operating voltage range for the W25Q40EWSNIG TR?
The W25Q40EWSNIG TR operates from 1.65 V to 1.95 V. This narrow 1.8 V nominal range ensures compatibility with modern low-power MCUs and eliminates the need for level shifters in 1.8 V I/O domains. Operation outside this range may cause undefined behavior or permanent damage, and the device includes built-in power-on reset circuitry that holds /CS inactive until VCC stabilizes within specification.
Does the W25Q40EWSNIG TR support Quad SPI mode out of the box?
No - the W25Q40EWSNIG TR defaults to Standard SPI mode at power-up. Quad SPI functionality requires setting the non-volatile Quad Enable (QE) bit in Status Register-2 using instruction 31h. Until QE=1, pins /WP and /HOLD remain dedicated to hardware write-protect and hold functions, not IO2/IO3. Failure to configure QE will prevent Quad I/O commands like 6Bh or EBh from executing correctly.
How many program-erase cycles does the W25Q40EWSNIG TR guarantee per sector?
The W25Q40EWSNIG TR guarantees a minimum of 100,000 program-erase cycles per 4 KB sector. This endurance rating is validated across the full industrial temperature range (-40°C to +85°C) and applies to all sectors regardless of address location. Field data indicates typical endurance exceeds 200,000 cycles, making it suitable for applications requiring frequent firmware updates or parameter logging.
Can the W25Q40EWSNIG TR be used for secure boot applications?
Yes - the W25Q40EWSNIG TR supports secure boot via multiple hardware features: a factory-programmed 64-bit unique serial number (readable via 4Bh), three 256-byte security registers with OTP lock bits (LB[3:0]), and SFDP register compliance for verified parameter loading. These enable cryptographic key binding, firmware image signing verification, and immutable device identity anchoring in bootloader implementations.
What package type does the W25Q40EWSNIG TR use, and is it RoHS-compliant?
The W25Q40EWSNIG TR uses an 8-pin SOIC 150-mil package (package code SN), with gull-wing leads, Pb-free terminations, and RoHS-compliant materials per EU Directive 2011/65/EU. The part marking "W25Q40EW" appears on the top surface, and the tape-and-reel packaging meets EIA-481 standards for automated SMT placement.
W25Q40EWSNIG 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:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- 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
W25Q40EWSNIG TR FAQ
1.How can I place an order for W25Q40EWSNIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q40EWSNIG 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 W25Q40EWSNIG TR reliable?
The price and inventory of W25Q40EWSNIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q40EWSNIG TR is usually 5 days.
3.What payment methods are accepted for W25Q40EWSNIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q40EWSNIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q40EWSNIG TR?
W25Q40EWSNIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q40EWSNIG 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 W25Q40EWSNIG TR?
For technical support, including W25Q40EWSNIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q40EWSNIG TR requirements.
6.How does Aetrix verify that W25Q40EWSNIG TR is sourced from the original manufacturer or authorized distributors?
All W25Q40EWSNIG 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 W25Q40EWSNIG TR meets industry standards.
7.What is the process for return or replacement of W25Q40EWSNIG TR?
All W25Q40EWSNIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q40EWSNIG 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 W25Q40EWSNIG TR part is unused and in its original packaging.
Return procedure for W25Q40EWSNIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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