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Winbond Electronics Corporation W25Q40EWSVIG TR
- Part No.:
- W25Q40EWSVIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q40EWSVIG TR.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,447
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Product details
Overview
W25Q40EWSVIG TR 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 max clock frequency, 4 KB uniform sector erase, and 100K program-erase cycles - used for code execution (XIP), firmware storage, and parameter retention in space-constrained embedded systems.
For engineers reviewing the W25Q40EWSVIG TR datasheet, W25Q40EWSVIG TR pinout, W25Q40EWSVIG TR application, or W25Q40EWSVIG TR equivalent, this page delivers verified electrical specs, SOIC-8 and VSOP-8 pin mapping, JEDEC ID and SFDP register support, Quad Enable (QE) bit behavior, and real-world XIP timing constraints - all confirmed from Winbond's official Revision H datasheet (Jan 2017).
Technical Context
The W25Q40EWSVIG TR implements a unified SPI command set with mode-selectable operation: Standard SPI uses DI/DO unidirectionally; Dual SPI repurposes DI/DO as bidirectional IO0/IO1; Quad SPI further enables IO2 (/WP) and IO3 (/HOLD) after setting the non-volatile QE bit in Status Register-2. QPI mode requires explicit entry via 38h instruction and uses all four IO lines for instruction fetch, reducing opcode latency from 8 to 2 clocks.
Its architecture features a 2,048-page array (256 bytes/page), 128 × 4 KB sectors, 8 × 64 KB blocks, and hardware write protection via /WP pin (active low) plus software-controlled BP[2:0], TB, SEC, and CMP bits. Erase/program suspend/resume capability enables concurrent background operations without interrupting host access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 K-byte), organized as 2,048 pages × 256 bytes - supports fine-grained firmware updates and parameter logging. |
| Supply Voltage | 1.65 V to 1.95 V - compatible with 1.8 V system rails; eliminates level-shifting in modern ultra-low-power MCUs. |
| Max Clock Frequency | 104 MHz for Dual/Quad SPI - enables 208 MB/s (Dual I/O) or 416 MB/s (Quad I/O) effective throughput using Fast Read instructions. |
| Erase Granularity | Uniform 4 KB sectors, 32 KB and 64 KB blocks - allows selective firmware patching without full chip erase. |
| Endurance & Retention | 100,000 program-erase cycles per sector; >20 years data retention - suitable for field-upgradable industrial controllers. |
| Interface Modes | Standard SPI (4-wire), Dual SPI (4-wire), Quad SPI (6-wire), QPI (6-wire) - selectable via QE bit and instruction set; no hardware mode pins required. |
| Unique ID & Security | 64-bit factory-programmed serial number; 3 × 256-byte OTP-lockable security registers; SFDP v1.6 compliant - enables secure boot binding and device authentication. |
Pinout & Package
W25Q40EWSVIG TR is packaged in 8-pin VSOP 150-mil (package code SV), with pin 1 marked by notch or dot. This leaded, surface-mount package supports reflow soldering and offers mechanical robustness for industrial temperature cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction; high-impedance DO when deasserted. |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; becomes IO1 in Dual/Quad SPI/QPI - carries read data or address LSBs. |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware write lock for status register when QE=0; repurposed as IO2 in Quad SPI/QPI - requires QE bit set to enable. |
| 4 GND | Ground Reference | Primary return path for VCC current and signal references; must be low-inductance connection for stable high-speed reads. |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; becomes IO0 in Dual/Quad SPI/QPI - carries instructions, addresses, and write data. |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference; supports SPI modes 0 and 3; max 104 MHz; duty cycle tolerance ±15% per datasheet AC specs. |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses active transfers when asserted low (QE=0); becomes IO3 in Quad SPI/QPI - function disabled if QE=1. |
| 8 VCC | Power Supply | 1.65–1.95 V supply; bypass capacitor (≥1 µF ceramic) required within 5 mm of pin for noise immunity during fast reads/writes. |
Key Features
| Feature | Design Value |
|---|---|
| Quad Enable (QE) Bit | Non-volatile bit in Status Register-2 that permanently reassigns /WP and /HOLD to IO2/IO3 - required for Quad SPI/QPI operation and irreversible without factory reset. |
| Erase/Program Suspend | Allows pausing a long erase or program operation (e.g., 64 KB block erase) to service urgent host reads - resumes from exact byte offset on resume command. |
| SFDP Register Support | JEDEC JESD216-compliant Serial Flash Discoverable Parameters table at 0x00000000 - enables automatic driver configuration without hard-coded timing parameters. |
| Top/Bottom Sector Protection | Configurable via TB and BP[2:0] bits to protect either highest or lowest 4 KB–512 KB region - prevents accidental bootloader overwrite during field updates. |
| 64-Bit Unique Serial Number | Factory-programmed, read-only identifier accessible via 4Bh instruction - used for device binding in secure boot and anti-cloning schemes. |
Applications
| IoT Edge Node Firmware Storage | Industrial PLC Boot Memory |
|---|---|
|
Use Scenario: Storing signed firmware images and OTA update payloads in battery-powered wireless sensors with limited PCB area. IC Role / Device Role / Timing Role: Primary non-volatile code storage enabling eXecute-In-Place (XIP) from Quad SPI bus to reduce external RAM footprint. Use Value: 4 KB sector granularity allows atomic update of individual firmware modules; 1 µA power-down current extends battery life beyond 10 years. |
Use Scenario: Holding boot loader, configuration tables, and calibration data in DIN-rail mounted programmable logic controllers operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Trusted boot source with hardware write protection preventing corruption during brown-out events or ESD transients. Use Value: /WP pin + TB/BP bits lock bootloader region; 100K endurance ensures >15-year field reliability under daily firmware revision cycles. |
| Medical Device Parameter Log | Automotive Infotainment Code Cache |
|
Use Scenario: Recording patient therapy settings and usage history in Class II medical instruments requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure parameter archive with 64-bit unique ID and OTP-lockable security registers for audit trail integrity. Use Value: 3×256-byte security registers store cryptographic keys; SFDP enables auto-negotiated read latencies across temperature ranges. |
Use Scenario: Caching navigation map tiles and UI assets in automotive head units where fast random-access read speed impacts perceived responsiveness. IC Role / Device Role / Timing Role: High-bandwidth XIP memory delivering 416 MB/s effective throughput via Fast Read Quad I/O (EBh) instruction. Use Value: 104 MHz Quad SPI clock reduces tile load latency by 4× vs. standard SPI - critical for <100 ms GUI frame rendering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L4006EM1I-12G | 4 M-bit, 1.65–2.0 V, 80 MHz max clock, SOIC-8; lacks QPI mode and SFDP register; uses different status register layout. | No Quad Peripheral Interface or auto-configurable SFDP - requires fixed driver timing; lower max throughput limits XIP performance. | Choose for cost-sensitive designs where QPI and SFDP are unnecessary and legacy driver compatibility is prioritized. |
| AT25SF041-SSHD-B | 4 M-bit, 1.7–2.0 V, 104 MHz, SOIC-8; supports Quad SPI and SFDP but no QPI mode; includes independent sector protection bits. | Missing QPI instruction set reduces instruction fetch efficiency in XIP; sector protection is more granular but lacks TB/BP complement mode. | Prefer when QPI is not needed but enhanced sector-level locking (per-sector WP enable) is required for multi-app partitioning. |
Compared with MX25L4006EM1I-12G and AT25SF041-SSHD-B, the W25Q40EWSVIG TR uniquely combines QPI mode for reduced instruction overhead, JEDEC SFDP for driver portability, and TB/BP complement protection - making it optimal for next-generation XIP-capable microcontrollers requiring field-upgradable, secure, and thermally robust firmware storage.
Availability
W25Q40EWSVIG TR is available at Aetrix Electronics and suitable for IoT edge node firmware storage, industrial PLC boot memory, medical device parameter logging, automotive infotainment code caching, and secure bootloader applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for W25Q40EWSVIG 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 DRAM, mobile DRAM, and serial flash memory solutions since 1987.
The W25Q series - including the W25Q40EWSVIG TR - was designed specifically for embedded systems requiring high-speed, low-voltage, and secure code storage with flexible interface options and industrial-grade reliability.
FAQ
What is the correct power-up sequence for reliable initialization of the W25Q40EWSVIG TR?
The W25Q40EWSVIG TR requires VCC to stabilize within 1.65–1.95 V before /CS transitions from high to low; /CS must remain high until VCC reaches valid level, then go low to accept first instruction. A pull-up resistor on /CS ensures proper tracking of VCC ramp. Failure to follow this sequence may result in undefined status register state or failed Write Enable commands. Always verify power rail monotonicity and timing margins per Section 8.3 of the datasheet.
Does the W25Q40EWSVIG TR support Quad SPI mode out-of-the-box?
No - the W25Q40EWSVIG TR ships with Quad Enable (QE) bit cleared (QE = 0) in Status Register-2, disabling /WP and /HOLD as IO2/IO3. To enable Quad SPI, software must first issue Write Enable (06h), then Write Status Register-2 (31h) with QE = 1. This change is non-volatile and persists across power cycles. Confirm QE status via Read Status Register-2 (35h) before issuing Quad I/O instructions like EBh.
How does the /HOLD pin behave when the W25Q40EWSVIG TR is in Quad SPI mode?
In Quad SPI mode (QE = 1), the /HOLD pin is reassigned as IO3 and loses its hold functionality entirely - asserting /HOLD low has no effect on ongoing transfers. The hold feature is only available in Standard and Dual SPI modes (QE = 0). Attempting to use /HOLD during Quad SPI will cause undefined behavior or bus contention. Always disable /HOLD control logic in firmware when enabling Quad SPI operation for the W25Q40EWSVIG TR.
Can the W25Q40EWSVIG TR be used for secure boot verification?
Yes - the W25Q40EWSVIG TR supports secure boot via its 64-bit unique serial number (readable with 4Bh), SFDP register for deterministic timing, and three 256-byte security registers with OTP lock bits (LB[3:0]). These registers can store public key hashes or signature certificates. Combined with hardware write protection (BP/TB bits), it prevents tampering of boot-critical regions - a capability confirmed in Sections 2 and 7.1.9 of the official datasheet.
What is the minimum erase block size supported by the W25Q40EWSVIG TR?
The W25Q40EWSVIG TR supports uniform 4 KB sector erase as its smallest erasable unit - corresponding to one contiguous group of 16 pages (16 × 256 bytes). This granularity enables precise firmware patching without disturbing adjacent application code or configuration data. Larger erases (32 KB and 64 KB blocks, or full chip) are also supported, but 4 KB is the atomic unit for partial updates and wear leveling algorithms.
W25Q40EWSVIG 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-VSOP
W25Q40EWSVIG TR FAQ
1.How can I place an order for W25Q40EWSVIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q40EWSVIG 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 W25Q40EWSVIG TR reliable?
The price and inventory of W25Q40EWSVIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q40EWSVIG TR is usually 5 days.
3.What payment methods are accepted for W25Q40EWSVIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q40EWSVIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q40EWSVIG TR?
W25Q40EWSVIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q40EWSVIG 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 W25Q40EWSVIG TR?
For technical support, including W25Q40EWSVIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q40EWSVIG TR requirements.
6.How does Aetrix verify that W25Q40EWSVIG TR is sourced from the original manufacturer or authorized distributors?
All W25Q40EWSVIG 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 W25Q40EWSVIG TR meets industry standards.
7.What is the process for return or replacement of W25Q40EWSVIG TR?
All W25Q40EWSVIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q40EWSVIG 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 W25Q40EWSVIG TR part is unused and in its original packaging.
Return procedure for W25Q40EWSVIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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