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Winbond Electronics Corporation W25X40VSNIG T&R
- Part No.:
- W25X40VSNIG T&R
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X40VSNIG T&R.pdf
- Description:
- IC FLASH 4MBIT SPI 75MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,888
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Product details
Overview
W25X40VSNIG T&R from Winbond is a 4M-bit (512KB) serial Flash memory IC designed for code storage and data logging in space-constrained embedded systems. It features uniform 4KB sectors, dual-output SPI interface supporting up to 75MHz clock (150Mbps effective), and operates from a single 2.7–3.6V supply with 5mA active and 1µA power-down current. It is commonly used in firmware boot storage for microcontrollers in industrial control modules.
For engineers reviewing the W25X40VSNIG T&R datasheet, W25X40VSNIG T&R pinout, W25X40VSNIG T&R application, or W25X40VSNIG T&R equivalent, key selection criteria include sector granularity (4KB), dual-output read performance, hardware/software write protection via /WP and status register, and SOIC-150-mil package compatibility with legacy PCB footprints.
Technical Context
The W25X40VSNIG T&R implements a standard SPI bus (Modes 0 and 3) with dedicated DO and bidirectional DIO pins, enabling both single-output and fast dual-output read operations using instruction 0x3B. Its internal architecture includes a 2048-page array (256 bytes/page), 128 erasable 4KB sectors, and 8 erasable 64KB blocks.
Write protection is enforced through three layers: hardware control via active-low /WP pin, software configuration of BP2–BP0 and TB bits in the status register, and Status Register Protect (SRP) bit enabling/disabling status register writes based on /WP state. The /HOLD pin provides deterministic bus arbitration by pausing ongoing SPI transfers without resetting internal state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB), organized as 2048 × 256-byte pages |
| Interface | Dual-output SPI: CLK, /CS, DIO (bidirectional), DO (dedicated output) |
| Max Clock Frequency | 75 MHz - enables 150 Mbps effective read throughput with Fast Read Dual Output (0x3B) |
| Erase Granularity | 4 KB sectors (128 total) and 64 KB blocks (8 total) - supports fine-grained parameter updates |
| Endurance & Retention | 100,000 program/erase cycles minimum; 20-year data retention at +85°C |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic systems without level shifting |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
W25X40VSNIG T&R uses an 8-pin SOIC-150-mil (package code SN) with gull-wing leads, 1.27 mm pitch, and 3.9 mm × 4.9 mm body size - compatible with standard reflow profiles and manual soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable: drives DO to high-Z when high; required low-to-high transition after power-up before instruction acceptance |
| 2 DO | Serial Data Output | Dedicated output for standard SPI reads and dual-output mode; data shifted out on CLK falling edge |
| 3 /WP | Write Protect Input | Hardware lock for status register writes when SRP = 1 and /WP = low; active-low, internally pulled up |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection to system ground plane |
| 5 DIO | Serial Data I/O | Bidirectional pin: inputs instructions/addresses on CLK rising edge; outputs data during Fast Read Dual Output (0x3B) |
| 6 CLK | Serial Clock Input | Timing reference for all SPI transfers; supports Mode 0 (CLK idle low) and Mode 3 (CLK idle high) |
| 7 /HOLD | Hold Input | Pauses active SPI operation while /CS remains low; places DO in high-Z and ignores DIO/CLK edges |
| 8 VCC | Power Supply | Single 2.7–3.6 V supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output SPI read mode | Enables 150 Mbps effective throughput using instruction 0x3B - reduces boot time vs. standard SPI by ~2× |
| Uniform 4KB sector erase | Allows independent update of configuration parameters or calibration data without disturbing adjacent firmware sections |
| Hardware + software write protection | Combines /WP pin control with programmable BP2–BP0 and TB bits to protect top/bottom memory regions selectively |
| Page programming (≤256 B) | Supports partial page writes with <2 ms latency - suitable for real-time logging of sensor data packets |
| HOLD pin for multi-device SPI sharing | Preserves internal state during bus arbitration - eliminates need for re-initialization when interrupting firmware reads |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
|
Use Scenario: Storing bootloader and application firmware in a DIN-rail mounted programmable logic controller with limited board area. IC Role / Device Role / Timing Role: Non-volatile code storage device interfaced to ARM Cortex-M7 MCU via SPI; provides deterministic 75 MHz read access during cold start. Use Value: 4KB sector granularity enables field-upgradable firmware patches without full chip erase; dual-output mode cuts boot time by 48% vs. standard SPI. |
Use Scenario: Holding certified boot image and safety-critical configuration data in portable ultrasound equipment requiring IEC 62304 compliance. IC Role / Device Role / Timing Role: Secure firmware repository with hardware write protection (/WP pin asserted during normal operation) and status register locking (SRP=1). Use Value: 100,000-cycle endurance and 20-year retention ensure reliability over product lifetime; SOIC-150-mil package allows automated optical inspection and rework. |
| Smart Meter Parameter Logging | Automotive Body Control Module |
|
Use Scenario: Recording time-stamped energy consumption metrics and tariff schedules in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Data logger with wear-leveling handled by host MCU; leverages 128 uniform 4KB sectors for cyclic buffer management. Use Value: Low 1 µA power-down current extends battery life during meter sleep mode; −40°C to +85°C rating ensures operation in outdoor enclosures. |
Use Scenario: Storing vehicle-specific calibration maps and diagnostic event logs in a CAN-connected body control unit. IC Role / Device Role / Timing Role: Secondary non-volatile memory supplementing internal MCU flash; accessed during CAN message processing via SPI DMA. Use Value: /HOLD pin enables seamless SPI bus sharing with CAN transceiver and LIN interface; 2.7–3.6 V range matches automotive 3.3 V rail tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSHN-B | 4 M-bit SPI Flash with 4KB sectors; supports 85 MHz max clock but lacks dual-output mode; requires separate /HOLD implementation | Higher clock speed but no 150 Mbps dual-read capability; less efficient for boot-time-critical systems | Prefer when maximum clock rate is prioritized over dual-output efficiency and /HOLD is not needed |
| SST25VF040B-80-4I-SAE | 4 M-bit SPI Flash with 4KB sectors; supports 80 MHz clock and dual-I/O (not dual-output); different status register layout and JEDEC ID | Requires modified driver for dual-I/O timing; lacks dedicated DO pin - shares DIO for all I/O | Choose only if existing SST25VF040B firmware and layout are reused; not drop-in compatible |
Compared with AT25DF041A-SSHN-B and SST25VF040B-80-4I-SAE, the W25X40VSNIG T&R delivers superior boot performance via dedicated dual-output read (0x3B), deterministic /HOLD behavior for multi-peripheral SPI sharing, and simpler hardware write protection using /WP + SRP - making it optimal for industrial and medical firmware storage where reliability and timing predictability are critical.
Availability
W25X40VSNIG T&R is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, smart meter parameter logging, and automotive body control module applications requiring stable component supply across extended production lifecycles.
Supply support for W25X40VSNIG T&R 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 manufacturer specializing in specialty memory solutions, including Serial Flash, PSRAM, and NOR/NAND Flash products for embedded and industrial markets.
The W25X series was designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable code storage, fast boot times, and flexible sector-based data management - targeting applications from consumer IoT to industrial automation.
FAQ
What is the exact memory organization of the W25X40VSNIG T&R?
The W25X40VSNIG T&R contains 4 M-bit (512 KB) of Flash memory, organized into 2048 programmable pages of 256 bytes each, 128 uniform 4KB erasable sectors, and 8 erasable 64KB blocks. This structure enables precise firmware patching and parameter storage without disturbing unrelated memory regions. The W25X40VSNIG T&R supports page programming (up to 256 bytes per operation), sector erase (4KB), block erase (64KB), and full chip erase.
Does the W25X40VSNIG T&R support dual-output SPI mode, and how is it enabled?
Yes, the W25X40VSNIG T&R supports dual-output SPI using the Fast Read Dual Output instruction (0x3B). When this command is issued, the DIO pin functions as a second data output alongside DO, doubling read throughput to 150 Mbps at 75 MHz clock. No configuration register setting is required - activation is instruction-driven. The W25X40VSNIG T&R maintains standard SPI compatibility for all other operations, ensuring backward compatibility with existing drivers.
How does hardware write protection work on the W25X40VSNIG T&R?
Hardware write protection on the W25X40VSNIG T&R is implemented via the active-low /WP pin in conjunction with the Status Register Protect (SRP) bit. When SRP = 1 and /WP is driven low, writes to the status register (including BP2–BP0 and TB bits) are blocked. This prevents accidental modification of memory protection settings during system operation. The W25X40VSNIG T&R also supports software-only protection using BP bits alone, or combined top/bottom array locking controlled by the TB bit.
What package type does the W25X40VSNIG T&R use, and is it RoHS compliant?
The W25X40VSNIG T&R uses an 8-pin SOIC-150-mil package (package code SN), measuring 3.9 mm × 4.9 mm with 1.27 mm lead pitch. It is RoHS compliant and halogen-free, meeting JEDEC standard MS-012AA. The "G" suffix in the part number explicitly denotes green (lead-free) packaging. This package is compatible with standard surface-mount assembly processes and supports both reflow and wave soldering.
Can the W25X40VSNIG T&R be used in systems requiring −40°C to +85°C operation?
Yes, the W25X40VSNIG T&R is fully specified and tested for industrial temperature operation from −40°C to +85°C. Its electrical characteristics - including 2.7–3.6 V supply range, 5 mA typical active current, and 1 µA power-down current - are guaranteed across this full range. The W25X40VSNIG T&R is widely deployed in outdoor industrial controllers, medical diagnostics equipment, and automotive body electronics where ambient thermal extremes are expected.
W25X40VSNIG T&R 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
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 75 MHz
- Write Cycle Time - Word, Page:
- 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25X40VSNIG T&R FAQ
1.How can I place an order for W25X40VSNIG T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X40VSNIG T&R 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 W25X40VSNIG T&R reliable?
The price and inventory of W25X40VSNIG T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X40VSNIG T&R is usually 5 days.
3.What payment methods are accepted for W25X40VSNIG T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X40VSNIG T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X40VSNIG T&R?
W25X40VSNIG T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X40VSNIG T&R 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 W25X40VSNIG T&R?
For technical support, including W25X40VSNIG T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X40VSNIG T&R requirements.
6.How does Aetrix verify that W25X40VSNIG T&R is sourced from the original manufacturer or authorized distributors?
All W25X40VSNIG T&R 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 W25X40VSNIG T&R meets industry standards.
7.What is the process for return or replacement of W25X40VSNIG T&R?
All W25X40VSNIG T&R units undergo pre-shipment inspection (PSI). If there is an issue with W25X40VSNIG T&R, 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 W25X40VSNIG T&R part is unused and in its original packaging.
Return procedure for W25X40VSNIG T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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