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Winbond Electronics Corporation W25X40AVDAIZ
- Part No.:
- W25X40AVDAIZ
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
W25X40AVDAIZ.pdf
- Description:
- IC FLASH 4MBIT SPI 100MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
W25X40AVDAIZ 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 up to 100MHz clock and 200Mbps data transfer via Fast Read Dual Output (3Bh), used for code storage and parameter retention in space-constrained embedded systems.
For engineers reviewing the W25X40AVDAIZ datasheet, W25X40AVDAIZ pinout, W25X40AVDAIZ application, or W25X40AVDAIZ equivalent, key selection criteria include SOIC-8 300-mil (DA) package compatibility, hardware write protection via /WP pin, sector-level erase granularity, JEDEC ID (EFh/3013h), and dual-output SPI timing compliance.
Technical Context
The W25X40AVDAIZ implements a standard SPI bus with support for Modes 0 and 3, and extends functionality with dual-output read mode using DIO as secondary output during Fast Read Dual Output (3Bh) instruction. It uses a 256-byte page architecture with 2048 programmable pages and 128 erasable 4KB sectors.
Internal control relies on an 8-bit status register with BUSY, WEL, BP2–BP0, TB, and SRP bits enabling flexible software/hardware write protection. The device integrates dedicated /HOLD and /WP pins for real-time bus arbitration and non-volatile memory locking independent of firmware state.
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 SPI Clock | 100MHz - enables 200Mbps effective throughput in dual-output mode |
| Erase Granularity | Uniform 4KB sectors (128 total) and 64KB blocks (8 total) - supports fine-grained data partitioning |
| Write Endurance | 100,000 program/erase cycles per sector - suitable for firmware update and logging use cases |
| Data Retention | 20 years at +25°C - ensures long-term reliability in industrial deployments |
| Package | 8-pin PDIP 300-mil (DA) - through-hole mounting for prototyping and legacy board designs |
Pinout & Package
W25X40AVDAIZ is packaged in an 8-pin PDIP 300-mil (package code DA), with lead spacing compliant to JEDEC MS-001. This through-hole package supports manual soldering, socket-based testing, and high-reliability industrial applications requiring mechanical robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction |
| 2 DO | Serial Data Output | Primary output for standard SPI reads; outputs MSB-first on CLK falling edge |
| 3 /WP | Write Protect Input | Hardware lock for status register; active-low, requires external pull-up when unused |
| 4 GND | Ground Reference | System ground return path; must be low-impedance for stable SPI timing |
| 5 DIO | Serial Data I/O | Bi-directional SPI data line; serves as secondary output during Fast Read Dual Output (3Bh) |
| 6 CLK | Serial Clock Input | Master-generated clock; supports SPI Modes 0 and 3; rising edge latches input, falling edge clocks output |
| 7 /HOLD | Hold Input | Pauses ongoing SPI transaction without deselecting device; enables multi-device bus sharing |
| 8 VCC | Power Supply | 2.7–3.6V supply; internal voltage regulator ensures consistent core operation across range |
Key Features
| Feature | Design Value |
|---|---|
| Dual Output SPI Interface | Enables 200Mbps read throughput using DIO as parallel output during 3Bh instruction - accelerates boot code shadowing |
| Hardware Write Protection | /WP pin + SRP bit combination prevents accidental status register modification - critical for field-deployed firmware integrity |
| Flexible Memory Protection | BP2–BP0 + TB bits allow top/bottom 1/2, 1/4, 1/8 or full-array lock - supports secure bootloader and configuration partitioning |
| Low-Power Operation | 1µA typical power-down current - extends battery life in always-on sensor nodes and IoT endpoints |
| JEDEC Standard Identification | Manufacturer ID EFh and Device ID 3013h - enables automated BOM validation and flash programming tool compatibility |
Applications
| Firmware Storage | Industrial HMI Configuration |
|---|---|
|
Use Scenario: Storing boot code, application firmware, and recovery images in microcontroller-based edge gateways. IC Role / Device Role / Timing Role: Non-volatile code storage with fast dual-output read for rapid RAM loading at power-up. Use Value: 100MHz SPI clock + Fast Read Dual Output reduces boot time by ~40% vs. standard SPI, verified in Winbond reference designs. |
Use Scenario: Retaining calibrated parameters, language packs, and user preferences in panel-mounted HMIs. IC Role / Device Role / Timing Role: Parameter storage with sector-level erase isolation to prevent corruption during partial updates. Use Value: 4KB uniform sectors allow independent update of display assets without disturbing calibration data stored in adjacent sectors. |
| Medical Device Log Buffer | Automotive Diagnostic Module |
|
Use Scenario: Cyclic logging of sensor readings and fault events in portable diagnostic tools. IC Role / Device Role / Timing Role: High-endurance data buffer supporting frequent 256-byte page writes and background sector wear leveling. Use Value: 100,000 erase/write cycles per sector ensures >5-year operation at 10 log entries/minute with wear-aware firmware. |
Use Scenario: Storing OBD-II protocol definitions, DTC mappings, and calibration tables in aftermarket scan tools. IC Role / Device Role / Timing Role: Secure firmware extension storage with hardware /WP pin locking to prevent unauthorized reprogramming. Use Value: /WP + SRP bit configuration blocks status register writes even during brown-out conditions - meets ISO 16750-2 transient immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q40EWDAIG | Same density and PDIP-8 (DA) package, but newer 1.8V/3.3V dual-voltage support and Quad SPI (QPI) mode | Supports faster QPI read (up to 400Mbps) and lower-voltage MCU interfaces; lacks /HOLD pin | Select for new designs requiring future-proof voltage flexibility and higher bandwidth; not drop-in due to command set differences |
| AT25DF041A-SSH-T | 4M-bit SPI flash in SOIC-8 (208-mil), 3.3V-only, no dual-output mode, 85MHz max clock | Limited to single-output SPI; smaller package footprint but no /HOLD or dual-read capability | Choose when board space is constrained and dual-output performance is unnecessary; requires PCB redesign for PDIP-to-SOIC swap |
Compared with W25X40AVDAIZ, W25Q40EWDAIG offers enhanced interface modes and voltage range but requires firmware adaptation, while AT25DF041A-SSH-T trades performance and feature depth for compact packaging - making W25X40AVDAIZ optimal for cost-sensitive, through-hole, dual-output-critical applications.
Availability
W25X40AVDAIZ is available at Aetrix Electronics and suitable for industrial HMI development, medical device log storage, and automotive diagnostic module production requiring stable component supply and long-lifecycle support.
Supply support for W25X40AVDAIZ 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 devices for embedded systems.
The W25X series was designed for cost-sensitive, space-constrained applications requiring reliable code and data storage with minimal pin count and low power - targeting consumer electronics, industrial controls, and automotive subsystems.
FAQ
What is the pin-compatible replacement for W25X40AVDAIZ in PDIP-8 package?
W25X40AVDAIZ has no pin-compatible replacement within the same family that retains identical instruction set, timing, and /HOLD functionality in PDIP-8. The W25Q40EWDAIG shares the DA package code and pinout but introduces Quad SPI commands and removes /HOLD - requiring firmware changes. For exact functional equivalence, W25X40AVDAIZ remains the only PDIP-8 option with dual-output SPI and hold capability.
Does W25X40AVDAIZ support Quad SPI mode?
No, W25X40AVDAIZ does not support Quad SPI mode. It supports only standard SPI (single I/O) and dual-output SPI (DIO + DO). Quad SPI capability was introduced in the later W25Qxx series. The W25X40AVDAIZ instruction set contains no 4-line read or write commands, and its pinout lacks dedicated QUAD I/O signals - confirmed in the August 2009 datasheet Revision F.
What JEDEC IDs does W25X40AVDAIZ report?
W25X40AVDAIZ reports Manufacturer ID = 0xEF and Device ID = 0x3013 when queried using the Release Power-down / Device ID (ABh) or JEDEC ID (9Fh) instructions. These values are fixed per the datasheet Table on page 29 and distinguish it from W25X10A (3011h), W25X20A (3012h), and W25X80A (3014h).
Can W25X40AVDAIZ be used with 1.8V MCUs?
No, W25X40AVDAIZ operates exclusively within 2.7V–3.6V. Its input thresholds and internal regulator are not specified for 1.8V logic levels. Interfacing with 1.8V MCUs requires level-shifting circuitry on all signal lines (/CS, CLK, DIO, DO, /WP, /HOLD), and even then, VCC must remain ≥2.7V. For native 1.8V operation, consider the W25Q40EW series instead.
How many 4KB sectors does W25X40AVDAIZ contain?
W25X40AVDAIZ contains 128 uniform 4KB sectors, totaling 512KB of addressable memory. This is derived from its 4M-bit capacity (524,288 bytes) divided by 4096 bytes per sector. The sector map is fixed and non-reconfigurable, enabling deterministic erase scheduling in safety-critical firmware updates.
W25X40AVDAIZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
W25X40AVDAIZ FAQ
1.How can I place an order for W25X40AVDAIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X40AVDAIZ 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 W25X40AVDAIZ reliable?
The price and inventory of W25X40AVDAIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X40AVDAIZ is usually 5 days.
3.What payment methods are accepted for W25X40AVDAIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X40AVDAIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X40AVDAIZ?
W25X40AVDAIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X40AVDAIZ 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 W25X40AVDAIZ?
For technical support, including W25X40AVDAIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X40AVDAIZ requirements.
6.How does Aetrix verify that W25X40AVDAIZ is sourced from the original manufacturer or authorized distributors?
All W25X40AVDAIZ 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 W25X40AVDAIZ meets industry standards.
7.What is the process for return or replacement of W25X40AVDAIZ?
All W25X40AVDAIZ units undergo pre-shipment inspection (PSI). If there is an issue with W25X40AVDAIZ, 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 W25X40AVDAIZ part is unused and in its original packaging.
Return procedure for W25X40AVDAIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25X40AVDAIZ Tags
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