My Inquiry
My Account
Winbond Electronics Corporation W25X40VSNIG
- Part No.:
- W25X40VSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X40VSNIG.pdf
- Description:
- IC FLASH 4MBIT SPI 75MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,609
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
W25X40VSNIG from Winbond is a 4M-bit (512KB) serial flash memory IC designed for embedded code storage and data logging in space-constrained SPI-based 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.
For engineers reviewing the W25X40VSNIG datasheet, W25X40VSNIG pinout, W25X40VSNIG application, or W25X40VSNIG 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 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 (3Bh instruction). Its internal architecture includes a 2048-page array (256 bytes/page), 128 erasable 4KB sectors, and 8 erasable 64KB blocks - enabling fine-grained data management without full-chip erase overhead.
Write protection is implemented through a non-volatile status register with BP2–BP0 and TB bits, configurable via Write Status Register (01h), and enforced by the active-low /WP pin when SRP=1. The /HOLD pin provides deterministic pause/resume capability during multi-device SPI sharing, preserving internal state across bus arbitration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4M-bit (512KB), organized as 2048 × 256-byte pages |
| Operating Voltage | 2.7V to 3.6V - compatible with 3.3V logic systems without level shifting |
| Max Clock Frequency | 75MHz - enables 150Mbps effective throughput using Fast Read Dual Output (3Bh) |
| Erase Granularity | 4KB sectors (128 total) and 64KB blocks (8 total) - supports partial updates without full-chip erase |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention at +85°C |
| Power Consumption | 5mA typical active current; 1µA typical power-down current - suitable for battery-backed applications |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade operation |
Pinout & Package
W25X40VSNIG is packaged in an 8-pin SOIC 150-mil (package code SN), measuring 3.9mm × 4.9mm, with gull-wing leads and standard JEDEC footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; device enters high-impedance output state when high; must track VCC at power-up |
| 2 DO | Data Output | Unidirectional serial output for standard reads and status; outputs on falling CLK edge |
| 3 /WP | Write Protect Input | Hardware lock for status register writes when SRP=1; active-low, requires external pull-up |
| 4 GND | Ground | Reference return path for all I/O and power circuits |
| 5 DIO | Data Input/Output | Bidirectional SPI data line; inputs on rising CLK edge; outputs during Fast Read Dual Output (3Bh) |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports SPI Modes 0 and 3; defines data sampling and shifting edges |
| 7 /HOLD | Hold Input | Pauses ongoing SPI transaction while /CS remains low; enables safe bus sharing with other peripherals |
| 8 VCC | Power Supply | Single 2.7–3.6V supply; powers core logic, memory array, and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output SPI interface | Enables 150Mbps read throughput via 3Bh instruction - reduces boot time vs. standard SPI |
| Uniform 4KB sector architecture | Allows precise firmware patching or parameter updates without erasing unrelated code sections |
| Hardware + software write protection | /WP pin and status register (BP2–BP0, TB, SRP) jointly prevent accidental erase/write in field-deployed units |
| Low-power power-down mode | 1µA standby current extends battery life in always-on IoT sensors and portable devices |
| HOLD pin for SPI bus arbitration | Preserves internal state during interrupt-driven bus contention - eliminates re-initialization overhead |
Applications
| Firmware Boot Storage | Industrial Data Logger |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Non-volatile code storage accessed via SPI during cold start; delivers instructions to RAM via shadowing. Use Value: 4KB sector granularity allows over-the-air firmware patches targeting only changed modules, minimizing update time and risk. |
Use Scenario: Capturing sensor readings (temperature, pressure, vibration) in remote environmental monitoring stations. IC Role / Device Role / Timing Role: Cyclic data buffer with wear-leveling handled by host MCU; erased per-sector as logs roll. Use Value: 100,000 erase cycles and 20-year retention ensure reliable 5+ year deployment without replacement. |
| Consumer Electronics UI Storage | Medical Device Configuration |
Use Scenario: Holding display assets (fonts, icons, UI strings) and user preference settings in smart home hubs. IC Role / Device Role / Timing Role: SPI-connected resource repository; read during GUI initialization and updated on settings change. Use Value: Dual-output read (3Bh) accelerates UI rendering startup by >40% compared to standard SPI reads at same clock rate. |
Use Scenario: Storing calibrated sensor coefficients, safety thresholds, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration store with hardware write protection enabled during normal operation. Use Value: /WP pin + SRP bit prevents runtime corruption of calibration data - critical for FDA-compliant traceability. |
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 | 4M-bit SPI flash; supports 85MHz clock but lacks dual-output mode; uses different status register layout | No Fast Read Dual Output - lower max read bandwidth; different WP/HOLD behavior and JEDEC ID | Choose if higher clock speed is prioritized over dual-output efficiency and existing W25X design reuse is not required |
| SST25VF040B-20-4I-SAE | 4M-bit SPI flash; 20MHz max clock; no dual-output; supports byte-write (not page-only); different pinout (SOIC-208-mil) | Slower read/write; no 75MHz or dual-output support; incompatible /HOLD timing and status register map | Choose only for legacy SST25-compatible designs where upgrade path is constrained by timing or register compatibility |
Compared with AT25DF041A-SSHN-B and SST25VF040B-20-4I-SAE, the W25X40VSNIG delivers superior read throughput via dual-output SPI and tighter integration with modern MCU bootloaders requiring fast code shadowing - while maintaining pin- and command-set compatibility within the Winbond W25X family.
Availability
W25X40VSNIG is available at Aetrix Electronics and suitable for firmware boot storage, industrial data logging, and consumer electronics UI asset storage requiring stable component supply and long-term industrial lifecycle support.
Supply support for W25X40VSNIG 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 serial flash, PSRAM, and code storage ICs for embedded systems.
The W25X series was designed specifically for cost-sensitive, space-constrained applications requiring reliable code execution and flexible data storage - targeting microcontroller-based industrial, automotive, and consumer platforms.
FAQ
What is the maximum SPI clock frequency supported by the W25X40VSNIG?
The W25X40VSNIG supports SPI clock frequencies up to 75MHz in Fast Read Dual Output mode (instruction 3Bh), delivering an effective data rate of 150Mbps. In standard Read (03h) or Fast Read (0Bh) modes, it operates reliably at up to 40MHz per AC characteristics tables. This 75MHz rating is validated across the full industrial temperature range (–40°C to +85°C) and requires proper signal integrity layout.
Does the W25X40VSNIG support true dual-line SPI data transfer?
No - the W25X40VSNIG implements dual-output SPI, not true dual-line (quad) SPI. During Fast Read Dual Output (3Bh), the DIO pin functions as a second data output alongside DO, transmitting even bits (D0, D2, D4, D6) while DO transmits odd bits (D1, D3, D5, D7) - achieving 2-bit-per-clock throughput. It does not support four-wire quad SPI (QSPI) or DDR modes.
How many 4KB sectors does the W25X40VSNIG contain, and how are they addressed?
The W25X40VSNIG contains 128 uniform 4KB sectors, spanning addresses 0x000000 to 0x07FFFF. Each sector begins at a 4KB-aligned boundary (e.g., 0x000000, 0x001000, ..., 0x07F000). Sector Erase (20h) requires a 3-byte address specifying the target sector's starting address; the command erases exactly that 4KB block, leaving others intact.
Can the W25X40VSNIG be used as a direct replacement for the W25X40VSSIG?
No - W25X40VSNIG and W25X40VSSIG differ in package: SNIG denotes 8-pin SOIC 150-mil (3.9×4.9mm), while VSSIG indicates 8-pin SOIC 208-mil (5.3×5.3mm). Though electrically and functionally identical, their footprints are mechanically incompatible. PCB layout must match the specific package code; substitution requires board revision.
What write protection mechanisms are available on the W25X40VSNIG?
The W25X40VSNIG provides layered write protection: (1) hardware via the active-low /WP pin, (2) software via status register bits BP2–BP0 and TB, and (3) volatile control via the Write Enable Latch (WEL). Protection is enforced only when SRP=1 and /WP is low - allowing selective locking of top/bottom memory regions down to 64KB granularity, as defined in the status register memory protection table.
W25X40VSNIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for W25X40VSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X40VSNIG 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 reliable?
The price and inventory of W25X40VSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X40VSNIG is usually 5 days.
3.What payment methods are accepted for W25X40VSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X40VSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X40VSNIG?
W25X40VSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X40VSNIG 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?
For technical support, including W25X40VSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X40VSNIG requirements.
6.How does Aetrix verify that W25X40VSNIG is sourced from the original manufacturer or authorized distributors?
All W25X40VSNIG 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 meets industry standards.
7.What is the process for return or replacement of W25X40VSNIG?
All W25X40VSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25X40VSNIG, 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 part is unused and in its original packaging.
Return procedure for W25X40VSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25X40VSNIG Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
