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Winbond Electronics Corporation W25Q40CLUXIG TR
- Part No.:
- W25Q40CLUXIG TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
W25Q40CLUXIG TR.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8USON
- Quantity:
- Payment:
- Shipping:
Inventory:3,645
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Product details
Overview
W25Q40CLUXIG TR from Winbond is a 4 M-bit (512 KB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with uniform 4 KB sectors, 32 KB and 64 KB blocks, and XIP-capable continuous read mode. It operates from 2.3 V to 3.6 V, draws ≤1 mA active current and <1 µA in power-down, and targets embedded code storage, firmware boot, and parameter retention in space-constrained industrial and consumer systems.
For engineers reviewing the W25Q40CLUXIG TR datasheet, W25Q40CLUXIG TR pinout, W25Q40CLUXIG TR application, or W25Q40CLUXIG TR equivalent, key selection considerations include Quad SPI enable (QE bit), /WP and /HOLD pin reassignment in Quad mode, sector-level hardware write protection, JEDEC ID and 64-bit unique serial number support, and USON 2×3 mm package compatibility with high-density PCB layouts.
Technical Context
The W25Q40CLUXIG TR implements a SPI-compatible command set with three operational modes: Standard SPI (DI/DO), Dual I/O (IO0/IO1), and Quad I/O (IO0–IO3), where IO2 and IO3 are remapped from /WP and /HOLD only when the non-volatile Quad Enable (QE) bit in Status Register-2 is set. Its block diagram includes a 2048-page × 256-byte array, page buffer, status/security registers, and high-voltage generators for erase/program operations.
It supports full instruction-level compatibility with JEDEC JESD216 SFDP v1.6, enabling automatic configuration by host controllers; features Erase/Program Suspend & Resume for real-time interrupt handling; and provides dual-layer write protection-software-configurable via BP2–BP0, TB, SEC, SRP0/SRP1 bits and hardware-controlled via /WP pin (active low, disabled in Quad mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB), organized as 2048 pages × 256 bytes |
| Operating Voltage | 2.3 V to 3.6 V - compatible with 2.5 V, 3.0 V, and 3.3 V logic domains without level shifting |
| Max Clock Frequency | 104 MHz - enables 416 Mbit/s effective throughput in Quad I/O mode (104 MHz × 4) |
| Erase Granularity | Uniform 4 KB sectors, plus 32 KB and 64 KB blocks - allows fine-grained firmware partitioning and OTA update safety |
| Endurance & Retention | ≥100,000 program/erase cycles; ≥20 years data retention at +85°C - suitable for field-upgradable embedded systems |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade operation without derating |
| Unique Identifier | 64-bit factory-programmed serial number - enables secure device binding and anti-cloning in IoT endpoints |
Pinout & Package
W25Q40CLUXIG TR is packaged in an 8-pad USON (Ultra Thin Small Outline No-lead) 2×3 mm body (Package Code UX), optimized for automated assembly and high-density routing on compact PCBs. The package has no exposed pad and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable: drives DO/IO pins to high-Z when high; required low-to-high transition before first instruction post-power-up |
| 2 IO1 (DO) | Bidirectional Data I/O (Standard/Dual) or Output (Quad) | Serves as DO in Standard SPI, IO1 in Dual/Quad modes; high-Z during /HOLD or /CS high |
| 3 IO2 (/WP) | Bidirectional Data I/O (Quad) or Hardware Write Protect (Standard/Dual) | In Quad mode (QE=1), functions as IO2; otherwise, active-low /WP pin controlling Status Register write lock |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance and decoupled near package |
| 5 IO0 (DI) | Bidirectional Data I/O (Standard/Dual) or Input (Quad) | Serves as DI in Standard SPI, IO0 in Dual/Quad modes; sampled on rising CLK edge |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference; supports SPI Modes 0 and 3; max 104 MHz frequency |
| 7 IO3 (/HOLD) | Bidirectional Data I/O (Quad) or Hold Input (Standard/Dual) | In Quad mode (QE=1), functions as IO3; otherwise, active-low /HOLD for pausing ongoing SPI transfers |
| 8 VCC | Power Supply | 2.3–3.6 V supply; requires local 100 nF ceramic decoupling capacitor placed within 2 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI with QE bit control | Enables 416 Mbit/s throughput; IO2/IO3 remapped from /WP and /HOLD only after non-volatile QE=1 setting |
| Continuous Read Mode | Reduces instruction overhead to ≤16 clocks per 24-bit address; enables true execute-in-place (XIP) from SPI bus |
| Hardware + software write protection | /WP pin locks Status Register writes; BP2–BP0 + TB + SEC bits allow 4 KB–full-array protection granularity |
| Erase/Program Suspend & Resume | Allows interruption of long-duration erase/program operations (e.g., during MCU ISR) and deterministic resumption |
| JEDEC-compliant SFDP register | Provides standardized, host-readable memory map, timing, and feature descriptors - eliminates hard-coded init sequences |
| 64-bit unique serial number | Factory-programmed, read-only identifier used for secure provisioning, device authentication, and firmware binding |
Applications
| Firmware Boot Storage | IoT Edge Device Configuration |
|---|---|
|
Use Scenario: Storing bootloader and application firmware for microcontrollers that execute code directly from SPI flash (XIP) during cold start. IC Role / Device Role / Timing Role: Primary non-volatile code storage with Quad SPI interface delivering >300 MB/s effective read bandwidth for fast boot. Use Value: Eliminates external RAM copy step; reduces BOM count and boot time by enabling direct execution from W25Q40CLUXIG TR's 4 KB sector-aligned memory map. |
Use Scenario: Holding calibrated sensor offsets, network credentials, and device-specific parameters in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Parameter retention storage with hardware /WP pin lock and 20-year data retention at +85°C. Use Value: Ensures configuration persistence across 10+ years of field deployment without refresh; leverages 4 KB sectors for atomic parameter updates. |
| Industrial HMI Display Firmware | Medical Diagnostic Instrument Log Buffer |
|
Use Scenario: Hosting GUI assets, font tables, and localized language strings for touch-based human-machine interfaces. IC Role / Device Role / Timing Role: High-reliability serial flash with 100,000+ P/E cycles supporting frequent UI asset updates over product lifetime. Use Value: Enables over-the-air (OTA) UI upgrades without requiring full flash reprogramming; uses sector erase to minimize update latency. |
Use Scenario: Capturing timestamped diagnostic logs and calibration history in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant log storage using OTP-lockable security registers and JEDEC ID verification. Use Value: Meets IEC 62304 traceability requirements via unique 64-bit serial number and write-protected log partitions. |
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, SOIC-8 only; supports Dual SPI but not Quad SPI; lacks SFDP and unique ID | No XIP optimization; limited to legacy SPI hosts without Quad support | Choose for cost-sensitive, non-XIP designs where Quad I/O and secure ID are unnecessary |
| AT25SF041-SSHD-B | 4 M-bit, USON 2×3 mm; supports Quad SPI and SFDP, but no 64-bit unique ID; 10K endurance | Lacks device-level traceability; lower endurance limits field firmware update frequency | Prefer when SFDP and Quad I/O are required but cryptographic binding is handled externally |
Compared with MX25L4006EM1I-12G and AT25SF041-SSHD-B, the W25Q40CLUXIG TR delivers superior XIP performance via Continuous Read Mode and hardware-enforced security through its factory-unique 64-bit ID and OTP-lockable security registers - making it optimal for certified medical and connected industrial systems.
Availability
W25Q40CLUXIG TR is available at Aetrix Electronics and suitable for industrial HMI, IoT endpoint firmware storage, and medical diagnostic log buffering requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25Q40CLUXIG 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 TrustME secure memory products.
The W25Q series is designed specifically for embedded systems requiring high-speed, reliable, and secure code and data storage - with emphasis on XIP capability, industrial temperature operation, and robust write protection architecture.
FAQ
What is the package type and footprint of the W25Q40CLUXIG TR?
The W25Q40CLUXIG TR uses an 8-pad USON (Ultra Thin Small Outline No-lead) package measuring 2 mm × 3 mm with 0.5 mm pitch. It has no exposed thermal pad and is compatible with standard reflow profiles for lead-free assembly. This compact footprint supports high-density PCB layouts in space-constrained applications such as wearables and portable diagnostics equipment.
Does the W25Q40CLUXIG TR support Quad SPI mode, and how is it enabled?
Yes, the W25Q40CLUXIG TR supports Quad SPI mode via Fast Read Quad I/O (EBh) and Fast Read Quad Output (6Bh) instructions. Quad mode is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 using the Write Status Register (01h) instruction. Once QE=1, pins /WP and /HOLD become IO2 and IO3, respectively - requiring firmware to reconfigure SPI peripheral accordingly.
How does hardware write protection work on the W25Q40CLUXIG TR?
Hardware write protection on the W25Q40CLUXIG TR is implemented via the active-low /WP pin, which disables writes to the Status Register when asserted. This protection works in Standard and Dual SPI modes only - in Quad SPI mode, /WP is repurposed as IO2 and hardware protection must rely on software-configured BP2–BP0 and SRP bits. The /WP pin must be pulled high via external resistor unless intentional lock-down is required.
What is the purpose of the 64-bit unique serial number in the W25Q40CLUXIG TR?
The 64-bit unique serial number in the W25Q40CLUXIG TR is factory-programmed and read-only, accessible via the Read Unique ID Number (4Bh) instruction. It serves as a cryptographically verifiable device identity for secure boot, firmware binding, anti-counterfeiting, and regulatory traceability - especially critical in medical and industrial applications governed by IEC 62304 or ISO 13485.
Can the W25Q40CLUXIG TR be used for execute-in-place (XIP) operation?
Yes, the W25Q40CLUXIG TR supports true execute-in-place (XIP) operation via its Continuous Read Mode, which reduces instruction overhead to as few as 16 clock cycles per 24-bit address. When combined with Quad SPI (up to 416 Mbit/s effective throughput), it enables microcontrollers to run application code directly from flash without copying to RAM - reducing boot time and SRAM usage in resource-constrained embedded systems.
W25Q40CLUXIG TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-UFDFN Exposed Pad
- 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
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 800µs
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-USON (2x3)
W25Q40CLUXIG TR FAQ
1.How can I place an order for W25Q40CLUXIG TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q40CLUXIG 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 W25Q40CLUXIG TR reliable?
The price and inventory of W25Q40CLUXIG TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q40CLUXIG TR is usually 5 days.
3.What payment methods are accepted for W25Q40CLUXIG TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q40CLUXIG TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q40CLUXIG TR?
W25Q40CLUXIG TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q40CLUXIG 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 W25Q40CLUXIG TR?
For technical support, including W25Q40CLUXIG TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q40CLUXIG TR requirements.
6.How does Aetrix verify that W25Q40CLUXIG TR is sourced from the original manufacturer or authorized distributors?
All W25Q40CLUXIG 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 W25Q40CLUXIG TR meets industry standards.
7.What is the process for return or replacement of W25Q40CLUXIG TR?
All W25Q40CLUXIG TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q40CLUXIG 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 W25Q40CLUXIG TR part is unused and in its original packaging.
Return procedure for W25Q40CLUXIG TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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