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Winbond Electronics Corporation W25X20AVSNIG
- Part No.:
- W25X20AVSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X20AVSNIG.pdf
- Description:
- IC FLASH 2MBIT SPI 100MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,136
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Product details
Overview
W25X20AVSNIG from Winbond is a 2M-bit (256KB) serial flash memory IC with uniform 4KB sectors and dual-output SPI interface, operating from 2.7V to 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 W25X20AVSNIG datasheet, W25X20AVSNIG pinout, W25X20AVSNIG application, or W25X20AVSNIG equivalent, key selection criteria include sector-erase granularity (4KB), hardware write protection via /WP pin, JEDEC ID compatibility (EFh/3012h), and SOIC-150-mil (SN) package compatibility with legacy PCB footprints.
Technical Context
The W25X20AVSNIG implements a standard SPI bus with support for Modes 0 and 3, using four dedicated pins (CLK, /CS, DIO, DO); its dual-output mode repurposes the DIO pin as a second data output during Fast Read Dual Output (3Bh) instruction execution, doubling throughput without requiring additional signal lines.
It features a status register with non-volatile Block Protect (BP2–BP0), Top/Bottom (TB), and Status Register Protect (SRP) bits enabling flexible hardware- and software-controlled memory protection; write operations require explicit Write Enable (06h) and are automatically disabled after program/erase completion or power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 M-bit (256 K-byte), organized as 1024 pages × 256 bytes |
| Sector Size | Uniform 4 KB sectors (64 sectors total), enabling fine-grained data updates |
| Max Clock Frequency | 100 MHz SPI clock, enabling 200 Mbps effective read rate with Fast Read Dual Output |
| Supply Voltage | 2.7 V to 3.6 V single supply; supports industrial temperature range (−40°C to +85°C) |
| Write Endurance | ≥100,000 program/erase cycles per sector |
| Data Retention | ≥20 years at +25°C, critical for long-life firmware and calibration storage |
| Active Current | 5 mA typical at 100 MHz read; 1 µA typical in power-down mode |
Pinout & Package
W25X20AVSNIG is packaged in an 8-pin SOIC 150-mil (Package Code SN), with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC footprint compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must track VCC at power-up; high-impedance DO when deasserted |
| 2 DO | Serial Data Output | Primary output for standard SPI reads; outputs data on CLK falling edge |
| 3 /WP | Write Protect Input | Hardware lock for status register writes when SRP = 1; active-low |
| 4 GND | Ground Reference | System ground return path for all I/O and core logic |
| 5 DIO | Serial Data I/O | Input for commands/addresses; becomes secondary output during Fast Read Dual Output (3Bh) |
| 6 CLK | Serial Clock Input | Timing reference for all SPI transfers; sampled on rising edge for input, falling edge for output |
| 7 /HOLD | Hold Input | Pauses ongoing SPI transaction while /CS remains low; enables multi-device bus sharing |
| 8 VCC | Power Supply | 2.7–3.6 V main supply; powers internal logic, charge pump, and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Dual Output SPI Mode | Enables 200 Mbps read throughput via 3Bh instruction by using DIO as second data line-no extra pins required |
| Hardware Write Protection | /WP pin + SRP bit combination prevents accidental status register modification, ensuring boot-critical memory regions remain locked |
| Flexible Memory Protection | Configurable top/bottom 4KB–512KB protection zones via BP2–BP0 and TB bits-supports secure bootloader + user-app partitioning |
| Low-Power Power-Down | B9h instruction reduces current to 1 µA typical, ideal for battery-backed real-time clocks and sleep-mode microcontrollers |
| JEDEC Standard IDs | Returns Manufacturer ID EFh and Device ID 3012h via ABh/90h instructions-ensures interoperability with generic flash programming tools |
Applications
| Industrial PLC Firmware Storage | Medical Sensor Calibration Data |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code and parameter storage with fast read access for cold-boot initialization and runtime reconfiguration. Use Value: 4KB sector erase allows incremental firmware patching without full chip erase; 20-year data retention ensures calibration stability over equipment lifetime. | Use Scenario: Retaining calibrated sensor offsets and gain coefficients in portable diagnostic devices subject to frequent power cycling. IC Role / Device Role / Timing Role: Parameter memory with deterministic write latency (<2 ms page program) and hardware write lock to prevent corruption during brown-out events. Use Value: /WP pin + SRP bit blocks unintended writes during power transitions; 1 µA power-down current extends battery life between calibrations. |
| Automotive Infotainment Bootloader | Smart Meter Firmware Update |
Use Scenario: Hosting secure bootloader code in automotive head units requiring AEC-Q100-compliant external flash (used with companion controller). IC Role / Device Role / Timing Role: Trusted boot source with verified JEDEC ID (EFh/3012h) and dual-output read for rapid code shadowing into RAM. Use Value: 100 MHz SPI clock + Fast Read Dual Output cuts boot time by ~50% vs. standard SPI; SOIC-150-mil package fits legacy automotive PCB layouts. | Use Scenario: Storing field-upgradable firmware and tariff tables in utility smart meters operating in wide-temperature outdoor enclosures. IC Role / Device Role / Timing Role: Field-programmable storage with robust write protection against EMI-induced corruption during OTA updates. Use Value: Block protect bits (BP2–BP0) isolate bootloader region from application updates; −40°C to +85°C rating ensures reliability in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF021A-SSHN-B | 2 M-bit, same SOIC-150-mil package, but uses standard SPI only (no dual-output mode); max clock 85 MHz | Lacks Fast Read Dual Output-lower read bandwidth; suitable where cost sensitivity outweighs speed requirement | Choose if dual-output is unnecessary and legacy Atmel toolchain support is preferred |
| MX25L2006EM1I-12G | 2 M-bit, SOIC-150-mil, supports dual-output SPI (3Bh), but requires different status register bit mapping for protection | Compatible read/write timing but distinct BP/TB bit layout-requires firmware register initialization update | Choose for drop-in replacement where dual-output performance is needed and register initialization can be modified |
Compared with AT25DF021A-SSHN-B, W25X20AVSNIG delivers 18% higher read bandwidth and integrated dual-output capability; versus MX25L2006EM1I-12G, it offers identical dual-output performance but simpler status register protection logic, reducing firmware validation effort.
Availability
W25X20AVSNIG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical sensor calibration data retention, and automotive infotainment bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for W25X20AVSNIG 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 code storage devices for embedded systems.
The W25X series was designed specifically for cost-sensitive, space-constrained applications requiring fast, reliable non-volatile storage with minimal pin count-targeting MCU-based consumer, industrial, and automotive subsystems.
FAQ
What is the memory organization of the W25X20AVSNIG?
The W25X20AVSNIG contains 2 M-bit (256 K-byte) of flash memory, organized into 1024 programmable pages of 256 bytes each and 64 uniform 4KB erasable sectors. This structure enables efficient partial updates and supports both sector erase (20h) and block erase (D8h) operations. The W25X20AVSNIG's page-based architecture allows up to 256 bytes to be programmed in a single Page Program (02h) instruction with typical latency under 2 ms.
Does the W25X20AVSNIG support dual-output SPI mode, and how is it enabled?
Yes, the W25X20AVSNIG supports dual-output SPI via the Fast Read Dual Output instruction (3Bh). When this command is issued, the DIO pin functions as a second data output alongside DO, delivering two bits per clock cycle and achieving up to 200 Mbps effective read throughput at 100 MHz clock. No configuration register setting is required-the mode activates automatically upon receipt of the 3Bh opcode, and reverts to standard SPI after completion.
How does hardware write protection work on the W25X20AVSNIG?
Hardware write protection on the W25X20AVSNIG combines the /WP pin with the Status Register Protect (SRP) bit. When SRP = 1 and /WP is driven low, the Write Status Register (01h) instruction is blocked, preventing changes to block protection bits (BP2–BP0) and TB. This ensures critical memory regions remain locked even during voltage transients. The W25X20AVSNIG's /WP pin is active-low and must be pulled high externally to allow status register writes when protection is disabled.
What JEDEC identifiers does the W25X20AVSNIG report, and why do they matter?
The W25X20AVSNIG reports Manufacturer ID EFh and Device ID 3012h via the Release Power-down/Device ID (ABh) and Read Manufacturer/Device ID (90h) instructions. These standardized identifiers allow host systems and programming tools to auto-detect the device type and select appropriate command sets and timing parameters. For the W25X20AVSNIG, correct ID recognition ensures compatibility with generic flash programmers and avoids misconfiguration in multi-vendor BOMs.
Is the W25X20AVSNIG compatible with standard SPI Mode 0 and Mode 3 interfaces?
Yes, the W25X20AVSNIG fully supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). In both modes, data is latched on the rising edge of CLK on the DIO pin and shifted out on the falling edge of CLK on DO and DIO (during dual-output reads). This dual-mode compatibility ensures seamless integration with diverse microcontroller SPI peripherals without requiring clock polarity or phase reconfiguration.
W25X20AVSNIG 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:
- 2Mbit
- Memory Organization:
- 256K 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
W25X20AVSNIG FAQ
1.How can I place an order for W25X20AVSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X20AVSNIG 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 W25X20AVSNIG reliable?
The price and inventory of W25X20AVSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X20AVSNIG is usually 5 days.
3.What payment methods are accepted for W25X20AVSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X20AVSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X20AVSNIG?
W25X20AVSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X20AVSNIG 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 W25X20AVSNIG?
For technical support, including W25X20AVSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X20AVSNIG requirements.
6.How does Aetrix verify that W25X20AVSNIG is sourced from the original manufacturer or authorized distributors?
All W25X20AVSNIG 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 W25X20AVSNIG meets industry standards.
7.What is the process for return or replacement of W25X20AVSNIG?
All W25X20AVSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25X20AVSNIG, 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 W25X20AVSNIG part is unused and in its original packaging.
Return procedure for W25X20AVSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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