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Winbond Electronics Corporation W25P40VSNIG T&R
- Part No.:
- W25P40VSNIG T&R
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25P40VSNIG T&R.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,857
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Product details
Overview
W25P40VSNIG T&R from Winbond is a 4M-bit (512KB) serial Flash memory IC with SPI interface, organized as 2048 pages × 256 bytes, supporting 40MHz fast read, single 2.7–3.6V supply, and hardware/software write protection via /WP pin and status register. It is used in microcontroller-based code download, firmware storage, and battery-powered embedded systems.
For engineers reviewing the W25P40VSNIG T&R datasheet, W25P40VSNIG T&R pinout, W25P40VSNIG T&R application, or W25P40VSNIG T&R equivalent, key selection criteria include 8-pin SOIC-150mil package compatibility, 40MHz SPI timing compliance, sector-level erase granularity (64KB), 100,000 program/erase cycles, and hardware write protect (/WP) + hold (/HOLD) functionality for robust system integration.
Technical Context
The W25P40VSNIG T&R implements a standard SPI bus interface compliant with Modes 0 and 3, using four dedicated signals (CLK, /CS, DI, DO) plus /WP and /HOLD control lines. Its internal architecture includes a 256-byte page buffer, status register with BUSY/WEL/BP2-BP0/SRP bits, and bottom-boot memory organization.
It supports byte-addressable read and page-program operations (≤256 bytes in <2ms), sector erase (64KB in 2s), and full chip erase (5s). Write enable/disable instructions (06h/04h) gate all programming/erasing, and the /HOLD pin enables pausing active SPI transfers without resetting internal state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4M-bit (512KB), organized as 2048 × 256-byte pages |
| SPI Clock Frequency | Up to 40MHz - enables high-speed firmware reads in resource-constrained MCU systems |
| Supply Voltage | 2.7V to 3.6V - compatible with standard 3.3V logic rails and low-power portable designs |
| Active Current | 4mA typical - minimizes power draw during code execution or data fetch |
| Power-down Current | 1µA typical - extends battery life in always-on or sleep-mode embedded devices |
| Erase/Write Endurance | 100,000 cycles - supports frequent field firmware updates over product lifetime |
| Data Retention | 20 years - ensures long-term reliability of stored boot code and configuration data |
Pinout & Package
W25P40VSNIG T&R uses an 8-pin SOIC-150mil package (Winbond code SN), with gull-wing leads, 1.27mm pitch, and 3.9mm × 4.9mm body dimensions. Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable: drives DO to high-Z when high; required low-to-high transition at power-up to accept new instructions |
| DO | Serial Data Output | Tri-state output: data shifted out on CLK falling edge; high-Z during /HOLD or /CS high |
| /WP | Write Protect Input | Active-low hardware lock: disables status register writes when SRP=1 and /WP=low |
| GND | Ground Reference | Signal and power return path; must be connected before VCC for proper reset behavior |
| DI | Serial Data Input | Instruction/address/data input: latched on CLK rising edge; MSB-first protocol |
| CLK | Serial Clock Input | Timing reference for SPI: supports Mode 0 (CLK idle low) and Mode 3 (CLK idle high) |
| /HOLD | Hold Input | Active-low pause: suspends ongoing SPI transfer while preserving internal state; requires /CS low to activate |
| VCC | Power Supply | Single 2.7–3.6V supply; device resets if VCC drops below VWI (~2.3V); tPUW delay applies after power-up |
Key Features
| Feature | Design Value |
|---|---|
| 40MHz Fast Read | Enables rapid boot code loading and real-time firmware patching without CPU wait states |
| Hardware Write Protect (/WP) | Prevents accidental status register modification during noise-prone system operation or brown-out conditions |
| /HOLD Functionality | Allows safe SPI bus sharing across multiple peripherals without interrupting ongoing flash operations |
| Page Program (≤256 bytes) | Reduces write latency vs. full-sector erase; supports incremental firmware updates and logging |
| Block Protection Bits (BP2–BP0) | Configurable memory locking: protects upper 1/8, 1/4, 1/2, or entire array from program/erase commands |
Applications
| Boot Code Storage | Firmware Update Storage |
|---|---|
Use Scenario: Storing primary bootloader and application firmware in MCU-based industrial controllers where external Flash replaces internal ROM. IC Role / Device Role / Timing Role: Non-volatile code storage device accessed via SPI during cold start and reset sequences. Use Value: Enables flexible firmware upgrades without replacing MCU; 40MHz read speed reduces boot time by >30% vs. 20MHz alternatives. | Use Scenario: Holding delta patches and full-image updates in smart metering endpoints with limited onboard memory. IC Role / Device Role / Timing Role: Field-upgradable firmware repository with atomic sector erase and page-program capability. Use Value: Supports secure, verified over-the-air updates with 100,000-cycle endurance and 20-year retention for regulatory compliance. |
| Configuration Data Logging | Battery-Powered Sensor Node |
Use Scenario: Recording calibration parameters, sensor offsets, and operational history in medical diagnostic equipment. IC Role / Device Role / Timing Role: Persistent parameter storage with hardware write protection to prevent corruption during power loss. Use Value: BP2–BP0 bits lock critical config sectors; /WP pin ensures immunity to ESD-induced register writes during servicing. | Use Scenario: Firmware and sensor calibration storage in wireless environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-power non-volatile memory with 1µA power-down current and fast wake-up read access. Use Value: Extends battery life beyond 5 years by minimizing active current (4mA) and enabling deep-sleep modes between measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q40BVSSIG | Quad SPI (QSPI) interface, 80MHz dual/quad read, same 4M-bit density and SOIC-8 package | Requires QSPI-capable host MCU; not pin-compatible due to different instruction set and /HOLD pin repurposed as IO2 | Select when higher throughput is needed and host supports QSPI; avoid if legacy SPI-only design or /HOLD functionality is required. |
| AT25DF041A-SSH-T | Same SPI interface, 4M-bit density, SOIC-8, but with deeper power-down (100nA) and faster sector erase (1.5s) | Uses different status register layout and lacks /HOLD pin; write protection controlled only via software | Choose for ultra-low-power battery applications where /HOLD is unused and 100nA sleep current outweighs missing hardware hold function. |
Compared with W25P40VSNIG T&R, W25Q40BVSSIG offers higher bandwidth but sacrifices /HOLD and pin compatibility, while AT25DF041A-SSH-T trades /HOLD and hardware write protect for lower sleep current and faster erase-making W25P40VSNIG T&R optimal for cost-sensitive, SPI-only systems requiring robust control signaling.
Availability
W25P40VSNIG T&R is available at Aetrix Electronics and suitable for boot code storage, firmware update repositories, and configuration data logging requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for W25P40VSNIG 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 company specializing in specialty DRAM, Flash memory, and mobile chips, founded in 1987 and publicly listed since 1995.
The W25P series is part of Winbond's legacy Serial Flash product line designed for cost-effective, pin-efficient code and data storage in microcontroller-based embedded systems with strict space and power constraints.
FAQ
What is the maximum SPI clock frequency supported by the W25P40VSNIG T&R?
The W25P40VSNIG T&R supports up to 40MHz for Fast Read operations and 33MHz for Standard Read. This timing is validated under 2.7–3.6V supply and -40°C to +85°C operating conditions. Exceeding 40MHz may cause read instability or command rejection, as confirmed in AC Electrical Characteristics section 8.6 of the datasheet. The W25P40VSNIG T&R does not support Quad SPI or DDR modes.
Does the W25P40VSNIG T&R have a /HOLD pin, and what is its function?
Yes, the W25P40VSNIG T&R includes an active-low /HOLD pin (Pin 7) that pauses ongoing SPI transfers while preserving internal state-including partially written page buffers-without resetting the device. This allows safe sharing of SPI bus lines with other peripherals. The /HOLD function requires /CS to remain low during assertion and is fully documented in Section 4.5 and 6.1.2 of the datasheet. The W25P40VSNIG T&R relies on this pin for deterministic multi-device arbitration.
How many program/erase cycles does the W25P40VSNIG T&R guarantee?
The W25P40VSNIG T&R guarantees 100,000 program/erase cycles per sector, as specified in Section 2 FEATURES and confirmed in AC Electrical Characteristics Table 8.4. This endurance rating applies to both Page Program and Sector Erase operations across the full temperature range (-40°C to +85°C). Data retention remains at 20 years after the final cycle. The W25P40VSNIG T&R does not specify wear leveling or dynamic refresh mechanisms.
What package type is used for the W25P40VSNIG T&R, and what are its dimensions?
The W25P40VSNIG T&R uses an 8-pin SOIC-150mil package (Winbond code SN), with 3.9mm × 4.9mm body size, 1.27mm lead pitch, and gull-wing leads. This is explicitly defined in Section 4.1 and Package Specification Section 9.1 of the datasheet. The "VSNIG" suffix confirms the SOIC-150mil variant; alternate packages like MLP require separate ordering codes and are not interchangeable with W25P40VSNIG T&R.
Can the W25P40VSNIG T&R be used as a direct replacement for NexFlash NX25P40?
Yes, the W25P40VSNIG T&R is fully compatible with the NexFlash NX25P40, as stated in the General Description (Section 1) and reiterated in the title page: "The Winbond W25P10/20/40 are fully compatible with the previous NexFlash NX25P10/20/40 Serial Flash memories." Pinout, instruction set, timing, and electrical characteristics match identically. No PCB or firmware changes are required when migrating from NX25P40 to W25P40VSNIG T&R.
W25P40VSNIG 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:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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
W25P40VSNIG T&R FAQ
1.How can I place an order for W25P40VSNIG T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for W25P40VSNIG 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 W25P40VSNIG T&R reliable?
The price and inventory of W25P40VSNIG 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 W25P40VSNIG T&R is usually 5 days.
3.What payment methods are accepted for W25P40VSNIG T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25P40VSNIG T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25P40VSNIG T&R?
W25P40VSNIG T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25P40VSNIG 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 W25P40VSNIG T&R?
For technical support, including W25P40VSNIG T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25P40VSNIG T&R requirements.
6.How does Aetrix verify that W25P40VSNIG T&R is sourced from the original manufacturer or authorized distributors?
All W25P40VSNIG 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 W25P40VSNIG T&R meets industry standards.
7.What is the process for return or replacement of W25P40VSNIG T&R?
All W25P40VSNIG T&R units undergo pre-shipment inspection (PSI). If there is an issue with W25P40VSNIG 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 W25P40VSNIG T&R part is unused and in its original packaging.
Return procedure for W25P40VSNIG T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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