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Winbond Electronics Corporation W25Q40BWSNIG TR
- Part No.:
- W25Q40BWSNIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q40BWSNIG TR.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
W25Q40BWSNIG TR from Winbond is a 4 M-bit (512 KB) serial NOR flash memory IC designed for code storage and XIP (execute-in-place) in space-constrained embedded systems. It supports standard, dual, and quad SPI interfaces with up to 80 MHz clock frequency, delivers 40 MB/s continuous read throughput, operates from 1.65–1.95 V, and features uniform 4 KB sector erase architecture.
For engineers reviewing the W25Q40BWSNIG TR datasheet, W25Q40BWSNIG TR pinout, W25Q40BWSNIG TR application, or W25Q40BWSNIG TR equivalent, key selection criteria include Quad SPI enable status, 1.8 V supply compatibility, SOIC-8 (150-mil) package footprint, hardware write protection via /WP pin, and JEDEC-compliant device identification support.
Technical Context
The W25Q40BWSNIG TR implements a SPI-compatible command set with Mode 0/3 support, configurable Quad Enable (QE) bit in Status Register-2, and flexible I/O mapping: DI/DO for standard/dual SPI, plus /WP and /HOLD repurposed as IO2/IO3 in quad mode. Its block diagram integrates 2,048 × 256-byte pages, high-voltage generators, and dedicated security register array.
It supports full instruction-level control over erasure (sector/32KB/64KB/chip), programming (1–256 bytes per page), and suspend/resume operations. Write protection combines volatile/non-volatile status bits (SRP0/SRP1, BP2–BP0), hardware /WP pin control, and OTP-locked security registers - all validated across -40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB), organized as 2,048 × 256-byte pages |
| Supply Voltage | 1.65–1.95 V - enables direct integration into 1.8 V logic domains without level shifting |
| Max Clock Frequency | 80 MHz - supports 160 MHz dual-I/O and 320 MHz quad-I/O effective data rates |
| Erase Granularity | Uniform 4 KB sectors (128 total), plus 32 KB and 64 KB blocks - enables fine-grained firmware partitioning |
| Write Endurance | 100,000 program/erase cycles per sector - suitable for field-upgradable firmware storage |
| Data Retention | 20 years at +85°C - meets industrial lifecycle requirements for unattended operation |
| Operating Temperature | -40°C to +85°C - qualified for automotive infotainment and industrial control environments |
| Power Consumption | 4 mA active current; <1 µA power-down - critical for battery-backed or energy-harvesting systems |
Pinout & Package
W25Q40BWSNIG TR uses an 8-pin SOIC-150-mil (package code SN) with gull-wing leads, 1.27 mm pitch, and 3.94 mm × 4.90 mm body size - compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable signal; must transition high→low after power-up before first instruction |
| DO (IO1) | Data Output / Bidirectional I/O1 | Unidirectional output in standard SPI; bidirectional in dual/quad modes - used for read data and status |
| /WP (IO2) | Write Protect Input / Bidirectional I/O2 | Hardware lock for status register writes; repurposed as IO2 when QE=1 (quad mode enabled) |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB connection |
| DI (IO0) | Data Input / Bidirectional I/O0 | Unidirectional input in standard SPI; bidirectional in dual/quad modes - carries instructions, addresses, and write data |
| CLK | Serial Clock Input | Synchronous timing reference for all SPI transfers; supports Mode 0 and Mode 3 polarity/phase |
| /HOLD (IO3) | Hold Input / Bidirectional I/O3 | Pauses ongoing SPI transaction; repurposed as IO3 when QE=1 - not available during quad operation |
| VCC | Power Supply | 1.65–1.95 V core supply; requires local 100 nF ceramic decoupling near pin |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI Interface | Enabled via non-volatile QE bit; allows 320 MHz effective read rate using Fast Read Quad I/O (EBh) |
| Continuous Read Mode | As few as 8 clocks overhead per 24-bit address - enables true XIP execution without external RAM buffering |
| Flexible Erase Architecture | Independent 4 KB sector, 32 KB block, and 64 KB block erase - supports differential firmware updates and parameter logging |
| Hardware + Software Write Protection | /WP pin + SRP/BP bits allow hierarchical locking - protects bootloader region while permitting application update |
| 64-Bit Unique Serial Number | Factory-programmed per-device ID - enables secure device authentication and anti-cloning in IoT endpoints |
| Security Register Array | 4 × 256-byte OTP-lockable registers - stores cryptographic keys or calibration data with irreversible write protection |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code storage with XIP capability and sector-level update isolation. Use Value: Enables field firmware upgrades without full chip erase; 4 KB sectors allow patching of individual function modules while preserving runtime-critical code. |
Use Scenario: Hosting boot code and UI assets for head-unit systems requiring fast startup and secure OTA updates. IC Role / Device Role / Timing Role: Primary boot memory accessed directly by ARM Cortex-A application processor via Quad SPI. Use Value: 40 MB/s read throughput reduces boot time by >3× vs. standard SPI; unique serial number supports secure key binding per unit. |
| Medical Sensor Data Logger | Smart Home Gateway Configuration |
Use Scenario: Recording calibrated sensor readings and diagnostic logs in portable medical devices operating on coin-cell batteries. IC Role / Device Role / Timing Role: Low-power persistent storage with hardware write protect for calibration constants. Use Value: <1 µA power-down current extends battery life; /WP pin physically locks critical calibration data against accidental overwrite during field servicing. |
Use Scenario: Storing Wi-Fi credentials, mesh network topology, and user preferences in residential gateways with no external storage. IC Role / Device Role / Timing Role: Secure configuration store with OTP-locked security registers for encryption keys. Use Value: 4×256-byte OTP registers prevent key extraction during physical tampering; JEDEC ID enables vendor-agnostic provisioning in mass production. |
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 |
|---|---|---|---|
| W25Q40EWSSIG | Same density and pinout; supports 1.7–2.0 V supply and extended -40°C to +105°C temp range | Required for under-hood automotive or high-ambient industrial deployments | Select W25Q40EWSSIG when operating above +85°C or requiring tighter voltage tolerance |
| MX25L4006EM1I-12G | 4 M-bit, SOIC-8, 1.65–2.0 V; supports standard/dual SPI only (no Quad SPI or QE bit) | Lacks quad interface and continuous read mode - limits XIP performance and bandwidth scalability | Choose MX25L4006EM1I-12G only if legacy SPI controller lacks quad support and bandwidth <20 MB/s is acceptable |
Compared with W25Q40BWSNIG TR, W25Q40EWSSIG offers broader temperature and voltage margins but identical feature set, while MX25L4006EM1I-12G sacrifices quad interface and advanced read modes - making it suitable only for cost-sensitive, non-XIP applications where bandwidth and flexibility are secondary.
Availability
W25Q40BWSNIG TR is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot code, and medical sensor data logging requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25Q40BWSNIG 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 SPI NOR/NAND flash, RAM, and mobile DRAM - serving industrial, automotive, and consumer markets since 1987.
The W25Q series targets high-performance embedded code storage, delivering enhanced bandwidth, security, and reliability beyond legacy serial flash - specifically engineered for XIP-capable microcontrollers and resource-constrained IoT edge nodes.
FAQ
What is the operating voltage range for the W25Q40BWSNIG TR?
The W25Q40BWSNIG TR operates from 1.65 V to 1.95 V. This narrow 1.8 V nominal range ensures compatibility with modern low-voltage microcontrollers and eliminates the need for level-shifting circuitry. Operation outside this range may cause undefined behavior or permanent damage. The device includes internal voltage monitoring that holds reset until VCC exceeds the threshold VWI, preventing spurious writes during power ramp-up.
Does the W25Q40BWSNIG TR support Quad SPI mode out of the box?
No - the W25Q40BWSNIG TR requires explicit configuration to enable Quad SPI. The non-volatile Quad Enable (QE) bit in Status Register-2 must be set using the Write Status Register (01h) instruction. Until QE=1, pins /WP and /HOLD remain functional as hardware write protect and hold inputs; after enabling QE, they become IO2 and IO3 for quad data transfer.
How many program/erase cycles does the W25Q40BWSNIG TR guarantee?
The W25Q40BWSNIG TR guarantees a minimum of 100,000 program/erase cycles per sector. This endurance rating applies to each of the 128 uniform 4 KB sectors independently, allowing wear leveling across the array. Combined with 20-year data retention at +85°C, this makes the W25Q40BWSNIG TR suitable for applications requiring frequent firmware updates or parameter logging over multi-year deployments.
Can the W25Q40BWSNIG TR be used for execute-in-place (XIP) operation?
Yes - the W25Q40BWSNIG TR supports true XIP via its Continuous Read Mode, which reduces instruction overhead to as few as 8 clock cycles per 24-bit address. When paired with a Quad SPI host controller and enabled QE bit, it delivers up to 40 MB/s sustained read throughput - sufficient for direct execution of real-time control code without copying to RAM, reducing system memory footprint and boot latency.
What package type does the W25Q40BWSNIG TR use, and is it RoHS-compliant?
The W25Q40BWSNIG TR uses an 8-pin SOIC-150-mil package (package code SN) with gull-wing leads and Pb-free, halogen-free construction compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. The "TR" suffix indicates tape-and-reel packaging optimized for SMT assembly, and the "IG" suffix denotes industrial-grade temperature qualification (-40°C to +85°C).
W25Q40BWSNIG 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:
- Obsolete
- 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
- Clock Frequency:
- 80 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
W25Q40BWSNIG TR FAQ
1.How can I place an order for W25Q40BWSNIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q40BWSNIG 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 W25Q40BWSNIG TR reliable?
The price and inventory of W25Q40BWSNIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q40BWSNIG TR is usually 5 days.
3.What payment methods are accepted for W25Q40BWSNIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q40BWSNIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q40BWSNIG TR?
W25Q40BWSNIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q40BWSNIG 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 W25Q40BWSNIG TR?
For technical support, including W25Q40BWSNIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q40BWSNIG TR requirements.
6.How does Aetrix verify that W25Q40BWSNIG TR is sourced from the original manufacturer or authorized distributors?
All W25Q40BWSNIG 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 W25Q40BWSNIG TR meets industry standards.
7.What is the process for return or replacement of W25Q40BWSNIG TR?
All W25Q40BWSNIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q40BWSNIG 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 W25Q40BWSNIG TR part is unused and in its original packaging.
Return procedure for W25Q40BWSNIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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