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Winbond Electronics Corporation W25X40AVSNIG
- Part No.:
- W25X40AVSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X40AVSNIG.pdf
- Description:
- IC FLASH 4MBIT SPI 100MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
W25X40AVSNIG from Winbond is a 4M-bit (512KB) serial flash memory IC with uniform 4KB sectors and dual-output SPI interface, operating at 2.7–3.6V, supporting 100MHz clock and 200Mbps Fast Read Dual Output transfer rate. It delivers 100,000+ erase/write cycles and 20-year data retention for embedded code storage and parameter logging in space-constrained systems.
For engineers reviewing the W25X40AVSNIG datasheet, W25X40AVSNIG pinout, W25X40AVSNIG application, or W25X40AVSNIG equivalent, key selection criteria include sector-erase granularity, /WP and /HOLD hardware control, SOIC-150-mil package compatibility, and JEDEC ID (EFh/3013h) verification.
Technical Context
The W25X40AVSNIG implements a standard SPI bus with Mode 0 and Mode 3 support, using four dedicated pins (CLK, /CS, DIO, DO) and two control inputs (/WP, /HOLD). Its dual-output capability activates only during Fast Read Dual Output (3Bh) instruction, repurposing DIO as a second data output line to double throughput without altering clock frequency.
Internal architecture features a 2048-page array (256 bytes/page), 128 erasable 4KB sectors, and 8 erasable 64KB blocks. Write protection combines software-configurable status register bits (BP2–BP0, TB, SRP) with hardware /WP pin assertion, enabling top/bottom array locking and status register write lockout when SRP=1 and /WP=low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 M-bit (512 KB), organized as 2048 × 256-byte pages |
| Operating Voltage | 2.7 V to 3.6 V - enables direct interface with 3.3V logic without level shifting |
| Max Clock Frequency | 100 MHz - supports 200 Mbps effective read rate via Fast Read Dual Output (3Bh) |
| Erase Granularity | 4 KB sectors (128 total) and 64 KB blocks (8 total) - enables fine-grained firmware update partitioning |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention at +85°C - suitable for field-upgradable industrial firmware |
| Interface Protocol | Standard SPI (Modes 0/3) + optional Dual Output - maintains backward compatibility while enabling bandwidth-critical boot loading |
| Write Protection | Hardware /WP pin + software BP/TB/SRP bits - allows hierarchical, field-configurable memory lockdown |
Pinout & Package
W25X40AVSNIG uses an 8-pin SOIC 150-mil (package code SN) surface-mount package with standard footprint and thermal profile for reflow assembly.
| 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 | Primary output for standard SPI reads; outputs MSB-first on CLK falling edge; high-Z during /HOLD or /CS high |
| 3 /WP | Write Protect Input | Active-low hardware lock: disables Status Register writes when SRP=1 and /WP=low; no effect if SRP=0 |
| 4 GND | Ground Reference | Signal and power return path; must be low-impedance to ensure stable VCC reference and timing integrity |
| 5 DIO | Serial Data I/O | Input for instructions/addresses/data (latched on CLK rising edge); becomes secondary output during Fast Read Dual Output (3Bh) |
| 6 CLK | Serial Clock Input | Master-generated timing signal; defines setup/hold windows for DIO sampling and DO output; supports 100 MHz max frequency |
| 7 /HOLD | Hold Input | Active-low pause: suspends ongoing SPI transaction when /CS is low; preserves internal state for multi-master bus arbitration |
| 8 VCC | Power Supply | 2.7–3.6 V supply; includes internal power-on reset circuitry that enforces tPUW delay before accepting write instructions |
Key Features
| Feature | Design Value |
|---|---|
| Dual Output SPI (3Bh) | Enables 200 Mbps read throughput by using DIO as parallel output line - critical for fast code shadowing at boot |
| Uniform 4KB Sectors | 128 individually erasable sectors allow precise firmware patching without disturbing adjacent configuration or calibration data |
| Hardware + Software WP | /WP pin and SRP/BP bits provide layered protection: factory-set defaults prevent accidental writes until explicit enable sequence |
| JEDEC Standard IDs | Manufacturer ID EFh and Device ID 3013h enable automated flash detection and vendor-agnostic bootloader support |
| Low-Power Operation | 1 µA typical power-down current extends battery life in always-on IoT edge nodes with infrequent firmware updates |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Logging |
|---|---|
Use Scenario: Storing firmware images and versioned bootloaders in programmable logic controllers with field upgrade capability. IC Role / Device Role / Timing Role: Non-volatile code storage with sector-erase isolation to preserve runtime parameters during partial firmware updates. Use Value: 4KB sector granularity prevents corruption of active control algorithms during over-the-air updates; /HOLD supports deterministic interrupt response during SPI bus sharing. | Use Scenario: Recording device calibration coefficients, usage logs, and safety-critical configuration snapshots in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with hardware write protection to prevent tampering with FDA-mandated calibration data. Use Value: /WP pin + SRP bit ensures calibration memory remains immutable unless explicitly unlocked via secure service mode - meeting IEC 62304 traceability requirements. |
| Automotive Infotainment Boot Memory | Smart Meter Firmware Vault |
Use Scenario: Hosting boot code and UI assets in automotive head units requiring AEC-Q100-compliant storage with rapid cold-boot performance. IC Role / Device Role / Timing Role: High-speed code execution source using Fast Read Dual Output to load kernel into RAM within <500ms after ignition. Use Value: 100 MHz SPI clock + dual-output mode achieves 200 Mbps read rate - reducing boot latency by 40% vs. standard SPI, satisfying ISO 15765-2 startup timing budgets. | Use Scenario: Securing utility firmware and tariff tables in AMI smart meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Tamper-resistant firmware vault with temperature-rated endurance (−40°C to +85°C) and write-cycle longevity for 15+ year deployments. Use Value: 20-year data retention and 100,000 erase cycles guarantee firmware integrity across full product lifecycle without field replacement - lowering TCO for utility fleet management. |
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 density, same SOIC-150 package, but supports only standard SPI (no dual output); max clock 85 MHz | Lacks Fast Read Dual Output - unsuitable for boot-time latency-critical applications requiring >150 Mbps read rates | Select only if dual-output bandwidth is unnecessary and legacy Atmel toolchain compatibility is required |
| S25FL032P0XMFI001 | 32 M-bit density, quad-SPI capable, SOIC-208 package; requires different pinout and layout | Higher capacity and QSPI interface demand PCB redesign and driver stack changes - not drop-in compatible | Choose for future-proofing with scalable density and faster quad-mode, but expect layout and firmware effort |
Compared with AT25DF041A-SSHN-B, W25X40AVSNIG delivers 18% higher clock rate and dual-output capability for boot acceleration; versus S25FL032P0XMFI001, it offers pin-compatible SOIC-150 fit with lower BOM cost and simpler SPI driver integration, albeit at fixed 4 M-bit capacity.
Availability
W25X40AVSNIG is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive infotainment, and smart metering applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25X40AVSNIG 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, mobile DRAM, and serial NOR/NAND flash memory solutions for embedded, communications, and consumer markets.
The W25X series was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power serial flash with flexible erase architecture and robust hardware/software write protection.
FAQ
What is the JEDEC manufacturer and device ID for W25X40AVSNIG?
The W25X40AVSNIG reports Manufacturer ID EFh and Device ID 3013h when queried using the Release Power-down / Device ID (ABh) or Read Manufacturer/Device ID (90h) instructions. These values are factory-programmed and used by bootloaders for automatic flash identification and configuration - ensuring correct timing and command set selection during system initialization.
Does W25X40AVSNIG support Quad SPI mode?
No, W25X40AVSNIG does not support Quad SPI. It supports only standard SPI (single I/O) and Dual Output SPI (using DO and DIO simultaneously during Fast Read Dual Output instruction 3Bh). Quad SPI capability requires separate pins for QIO/QO and is found in later Winbond families like W25Q, not the legacy W25X series.
What is the maximum allowable /CS low-to-high pulse width during W25X40AVSNIG operation?
The W25X40AVSNIG requires /CS to remain low for the full duration of any instruction cycle - including Page Program (tPP ≤ 3 ms), Sector Erase (tSE ≤ 35 ms), or Chip Erase (tCE ≤ 30 s). Premature /CS deassertion terminates the instruction and may corrupt memory; minimum /CS high time between commands is 100 ns per AC Electrical Characteristics table.
Can W25X40AVSNIG be used in place of W25X40CLSNIG?
Yes, W25X40AVSNIG is a direct functional and pin-compatible replacement for W25X40CLSNIG. Both share identical SOIC-150-mil (SN) packaging, 4 M-bit density, electrical specifications, instruction set, and timing parameters. The 'A' suffix denotes the final revision (Revision F) with enhanced reliability and updated qualification - making it the recommended production version.
How does the /HOLD function interact with ongoing Page Program operations in W25X40AVSNIG?
The /HOLD function has no effect on active Page Program, Sector Erase, or Chip Erase operations in W25X40AVSNIG. Once initiated, these internal cycles run to completion regardless of /HOLD state. /HOLD only pauses instruction input and data transfer during active /CS periods - it cannot suspend or resume non-volatile memory programming or erasing, which are autonomous analog processes.
W25X40AVSNIG 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:
- 100 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
W25X40AVSNIG FAQ
1.How can I place an order for W25X40AVSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X40AVSNIG 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 W25X40AVSNIG reliable?
The price and inventory of W25X40AVSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X40AVSNIG is usually 5 days.
3.What payment methods are accepted for W25X40AVSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X40AVSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X40AVSNIG?
W25X40AVSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X40AVSNIG 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 W25X40AVSNIG?
For technical support, including W25X40AVSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X40AVSNIG requirements.
6.How does Aetrix verify that W25X40AVSNIG is sourced from the original manufacturer or authorized distributors?
All W25X40AVSNIG 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 W25X40AVSNIG meets industry standards.
7.What is the process for return or replacement of W25X40AVSNIG?
All W25X40AVSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25X40AVSNIG, 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 W25X40AVSNIG part is unused and in its original packaging.
Return procedure for W25X40AVSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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