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Winbond Electronics Corporation W25Q40EWSVIG
- Part No.:
- W25Q40EWSVIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q40EWSVIG.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,766
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Product details
Overview
W25Q40EWSVIG from Winbond is a 4 M-bit (512 KB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, operating from 1.65 V to 1.95 V, with 104 MHz clock capability, 4 KB uniform sector erase, and integrated hardware write protection via /WP and /HOLD pins - used for code storage and XIP in space-constrained embedded microcontrollers.
For engineers reviewing the W25Q40EWSVIG datasheet, W25Q40EWSVIG pinout, W25Q40EWSVIG application, or W25Q40EWSVIG equivalent, this page delivers verified electrical specs, SOIC-8 pin mapping, JEDEC ID and SFDP register support, Quad Enable (QE) bit behavior, and real-world use cases in boot code storage and firmware update systems.
Technical Context
The W25Q40EWSVIG implements a flexible SPI command architecture with three operational modes: Standard SPI (DI/DO), Dual SPI (IO0/IO1), and Quad SPI/QPI (IO0–IO3), where IO2 and IO3 are remapped from /WP and /HOLD only when the non-volatile QE bit in Status Register-2 is set. It supports both Mode 0 and Mode 3 clock polarity.
Its memory array comprises 2,048 pages of 256 bytes each, organized into 128 erasable 4 KB sectors and 8 erasable 64 KB blocks. Erase/program suspend/resume functionality enables concurrent background operations, while the 64-bit unique serial number and 3×256-byte OTP-locked security registers provide traceability and secure parameter storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB) - sufficient for bootloader + firmware image in compact MCU designs |
| Supply Voltage | 1.65 V to 1.95 V - compatible with low-voltage I/O domains of modern ARM Cortex-M and RISC-V SoCs |
| Max Clock Frequency | 104 MHz SPI - enables 416 MB/s effective throughput in Quad I/O mode using Fast Read Quad I/O (EBh) |
| Erase Granularity | Uniform 4 KB sectors - allows fine-grained firmware partitioning and OTA update rollback without full chip erase |
| Endurance & Retention | 100,000 program/erase cycles per sector; >20 years data retention - validated for industrial lifecycle requirements |
| Interface Modes | Standard/Dual/Quad SPI + QPI - QPI reduces instruction overhead to 2 clocks vs. 8 in SPI, improving XIP latency |
| Security Features | 64-bit unique ID, SFDP register, 3×256-byte OTP security registers - supports device authentication and secure key storage |
Pinout & Package
W25Q40EWSVIG is supplied in an 8-pin SOIC 150-mil package (package code SN), with industry-standard pinout compatible with legacy SPI flash footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction; controls DO high-impedance state |
| DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; becomes IO1 in Dual/Quad/QPI modes; used for status/data read on CLK falling edge |
| /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for Status Register when QE=0; remapped to IO2 in Quad/QPI mode when QE=1 |
| GND | Ground Reference | Signal and power return path; requires low-impedance connection to minimize noise during fast read/write |
| DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; becomes IO0 in all enhanced modes; carries instructions/addresses on CLK rising edge |
| CLK | Serial Clock Input | Synchronous timing reference; supports Mode 0 and Mode 3; max 104 MHz; edge-sensitive for all transfers |
| /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses active operation when low (CS must remain low); disabled and remapped to IO3 when QE=1 |
| VCC | Power Supply | 1.65–1.95 V core supply; decoupling capacitor required near pin to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Dual/Quad I/O & QPI Support | Enables 208 MB/s (Dual) and 416 MB/s (Quad) effective bandwidth; QPI cuts instruction latency by 75% vs. SPI |
| 4 KB Uniform Sector Architecture | Allows independent firmware partitioning (e.g., bootloader, app, config) without erasing unrelated regions |
| Erase/Program Suspend & Resume | Permits interrupt-driven execution: pause erase/program to service higher-priority tasks, then resume from exact point |
| Hardware Write Protection | /WP pin + BP/TB/SEC bits enable selective locking of sectors or top/bottom array halves - prevents accidental overwrite |
| JEDEC ID & SFDP Register | Enables automatic driver detection and configuration in Linux/RTOS; eliminates hard-coded timing parameters |
Applications
| Boot Code Storage | Firmware Over-the-Air (OTA) Updates |
|---|---|
Use Scenario: Storing primary bootloader and initial firmware image for ARM Cortex-M4 microcontrollers in medical sensor nodes. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP-capable Quad SPI interface enabling direct execution without RAM copy. Use Value: Reduces BOM cost and PCB area by eliminating parallel NOR flash; 104 MHz Quad I/O ensures sub-100 ms boot time. | Use Scenario: Secure field update of firmware in industrial gateways with dual-bank OTA scheme. IC Role / Device Role / Timing Role: Dual-sector storage for active/inactive firmware images; uses 4 KB sector erase for atomic swap. Use Value: Enables safe rollback on failed update; hardware write protection prevents corruption during power loss. |
| Secure Parameter Storage | Audio/Configuration Data Logging |
Use Scenario: Storing calibrated sensor offsets and cryptographic keys in automotive ADAS ECUs. IC Role / Device Role / Timing Role: OTP-locked security register usage with 64-bit unique ID for device binding. Use Value: Prevents key extraction via physical probing; SFDP register ensures consistent driver initialization across batches. | Use Scenario: Recording audio snippets and system logs in battery-powered voice assistants. IC Role / Device Role / Timing Role: Low-power data buffer with <1 µA power-down current and fast 4 KB sector erase for cyclic logging. Use Value: Extends battery life over 2 years; uniform sector size simplifies wear-leveling in firmware. |
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 W25Q40EWUXIE | Same die, USON 2x3-mm package (no leads); 0.5 mm pitch; thermal pad optional | Requires rework of PCB layout; better thermal performance in dense layouts | Select for space-constrained portable devices where SOIC footprint is prohibitive |
| Micron MT25QL04A | 4 M-bit, 1.7–2.0 V supply, 133 MHz max clock, supports octal DTR mode (not supported by W25Q40EWSVIG) | Higher bandwidth potential but requires controller with octal support; different SFDP structure | Select only if migrating to octal-capable host and needing >416 MB/s throughput |
Compared with W25Q40EWSVIG, the W25Q40EWUXIE offers identical functionality in a smaller USON package but demands layout revision, while the MT25QL04A provides higher clock speed and octal mode at the cost of firmware driver compatibility and increased host complexity.
Availability
W25Q40EWSVIG is available at Aetrix Electronics and suitable for boot code storage, firmware OTA updates, and secure parameter storage requiring stable component supply, long-term industrial availability, and RoHS-compliant sourcing.
Supply support for W25Q40EWSVIG 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 DRAM, mobile DRAM, and serial flash memory solutions for consumer, industrial, and automotive markets.
The W25Q series targets embedded systems requiring high-speed, low-voltage, and secure code/data storage - designed specifically for XIP, OTA, and trusted boot applications in resource-constrained MCUs.
FAQ
What voltage range does the W25Q40EWSVIG support, and is it compatible with 1.8 V I/O systems?
The W25Q40EWSVIG operates strictly within 1.65 V to 1.95 V, making it fully compatible with 1.8 V nominal I/O domains. Its logic thresholds are specified relative to VCC, so no level-shifting is required when interfaced with 1.8 V microcontrollers. The W25Q40EWSVIG datasheet confirms VIH min = 0.7×VCC and VIL max = 0.3×VCC across temperature, ensuring robust noise margins in 1.8 V systems.
Does the W25Q40EWSVIG support execute-in-place (XIP), and what interface mode delivers optimal performance?
Yes, the W25Q40EWSVIG supports XIP via Dual and Quad SPI modes, with Quad SPI delivering optimal performance: Fast Read Quad I/O (EBh) achieves up to 416 MB/s effective throughput at 104 MHz clock. The W25Q40EWSVIG's uniform 4 KB sectors and erase/program suspend allow seamless XIP during background firmware updates without halting execution.
How is Quad SPI mode enabled on the W25Q40EWSVIG, and what happens to the /WP and /HOLD pins?
Quad SPI mode is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 (SR2) using Write Status Register-2 (31h). Once QE = 1, the W25Q40EWSVIG remaps /WP to IO2 and /HOLD to IO3 for bidirectional data transfer. These pins lose their hardware protection functions - write protection must then be managed exclusively via status register bits (BP, TB, SEC).
What is the purpose of the 64-bit Unique ID in the W25Q40EWSVIG, and how is it accessed?
Each W25Q40EWSVIG unit contains a factory-programmed, unalterable 64-bit Unique ID used for device authentication, secure boot binding, and anti-counterfeiting. It is read via the Read Unique ID Number instruction (4Bh), which outputs the ID on IO0–IO3 in Quad I/O mode or DI/DO in Standard SPI mode - accessible without prior configuration or unlock sequence.
Can the W25Q40EWSVIG be used in systems requiring data retention beyond 10 years, and what validates this claim?
Yes, the W25Q40EWSVIG guarantees >20 years of data retention at +85°C, validated per JEDEC JESD22-A117 stress testing. This specification is explicitly stated in Section 2 (Features) and Table 8.4 (DC Electrical Characteristics) of the official datasheet, making it suitable for industrial and automotive applications where long-term firmware integrity is critical.
W25Q40EWSVIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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-VSOP
W25Q40EWSVIG FAQ
1.How can I place an order for W25Q40EWSVIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q40EWSVIG 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 W25Q40EWSVIG reliable?
The price and inventory of W25Q40EWSVIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q40EWSVIG is usually 5 days.
3.What payment methods are accepted for W25Q40EWSVIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q40EWSVIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q40EWSVIG?
W25Q40EWSVIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q40EWSVIG 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 W25Q40EWSVIG?
For technical support, including W25Q40EWSVIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q40EWSVIG requirements.
6.How does Aetrix verify that W25Q40EWSVIG is sourced from the original manufacturer or authorized distributors?
All W25Q40EWSVIG 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 W25Q40EWSVIG meets industry standards.
7.What is the process for return or replacement of W25Q40EWSVIG?
All W25Q40EWSVIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q40EWSVIG, 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 W25Q40EWSVIG part is unused and in its original packaging.
Return procedure for W25Q40EWSVIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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