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Winbond Electronics Corporation W25X20BVSNIG
- Part No.:
- W25X20BVSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X20BVSNIG.pdf
- Description:
- IC FLASH 2MBIT SPI 104MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
W25X20BVSNIG from Winbond is a 2M-bit (256KB) serial flash memory IC with SPI and Dual I/O interface, organized into 1,024 pages of 256 bytes each and 64 uniform 4KB sectors. It supports 104MHz clock operation, delivers up to 208Mbps data transfer via Fast Read Dual Output (3Bh), and operates on a single 2.7–3.6V supply with 4mA active and 1µA power-down current. It is used in embedded code storage, firmware boot loaders, and parameter retention in space-constrained industrial controllers.
For engineers reviewing the W25X20BVSNIG datasheet, W25X20BVSNIG pinout, W25X20BVSNIG application, or W25X20BVSNIG equivalent, key selection considerations include sector-level erase granularity (4KB), hardware/software write protection via /WP and status register bits (BP2–BP0, TB, SRP), dual I/O SPI compatibility, SOIC-8 150-mil package footprint, and JEDEC-compliant device identification (Manufacturer ID EFh, Device ID 3012h).
Technical Context
The W25X20BVSNIG implements a standard SPI Mode 0/3 interface with dedicated /CS, CLK, DO (IO1), DIO (IO0), /WP, and /HOLD pins, enabling both single-line and dual-line read operations. Its internal architecture includes a 256-byte page buffer, block segmentation logic for 4KB sectors and 64KB blocks, and high-voltage generators for program/erase cycles.
It features a non-volatile status register with BUSY flag, Write Enable Latch (WEL), Block Protect (BP2–BP0), Top/Bottom (TB), and Status Register Protect (SRP) bits - all configurable via Write Status Register (01h) after issuing Write Enable (06h). Protection can be applied to top or bottom memory regions, with granularity down to 64KB blocks or 4KB sectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2M-bit (256KB) total storage capacity, mapped as 1,024 × 256-byte pages |
| Sector Architecture | 64 uniform 4KB sectors - enables fine-grained data updates without erasing larger blocks |
| Max SPI Clock | 104MHz - supports high-speed instruction execution and fast read throughput |
| Data Transfer Rate | Up to 208Mbps using Fast Read Dual Output (3Bh) - matches parallel flash performance in XIP-capable systems |
| Write/Erase Endurance | ≥100,000 program/erase cycles per sector - suitable for field-upgradable firmware storage |
| Data Retention | ≥20 years at +25°C - ensures long-term reliability for unpowered archival storage |
| Supply Voltage | 2.7V to 3.6V - compatible with 3.3V logic systems and tolerant of typical rail variation |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
W25X20BVSNIG is packaged in an 8-pin SOIC 150-mil (package code SN), with gull-wing leads, 1.27mm pitch, and body dimensions of 3.9mm × 4.9mm. This RoHS-compliant surface-mount package supports reflow soldering and fits standard PCB footprints for legacy and new designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable signal - must transition high→low before instruction acceptance; controls device power state and SPI bus arbitration |
| 2 DO (IO1) | Serial Data Output / Dual I/O | Unidirectional output in standard SPI; bidirectional I/O in Dual SPI mode - carries read data or address during dual-output reads (3Bh) |
| 3 /WP | Hardware Write Protect Input | Active-low pin that locks status register writes when SRP=1 - provides fail-safe protection against noise-induced corruption |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals - requires low-impedance connection to minimize noise coupling during high-speed reads |
| 5 DIO (IO0) | Serial Data Input/Output / Dual I/O | Unidirectional input in standard SPI; bidirectional I/O in Dual SPI - carries instructions, addresses, and data in both directions during BBh operations |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference - rising edge clocks input data (DI/DIO), falling edge clocks output data (DO); supports Mode 0 and Mode 3 |
| 7 /HOLD | Hold Control Input | Pauses ongoing SPI transaction while /CS remains low - allows bus sharing with other peripherals without losing internal state |
| 8 VCC | Power Supply | Single 2.7–3.6V supply - powers core logic, charge pumps, and I/O buffers; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O SPI Interface | Enables BBh instruction for bidirectional data transfer on IO0/IO1 - doubles effective bandwidth over standard SPI without additional pins |
| Uniform 4KB Sectors | Allows independent erase of small data regions - critical for logging, configuration storage, and OTA update staging without disrupting firmware |
| Programmable Block Protection | Configurable via BP2–BP0 and TB bits to protect top/bottom memory regions - supports secure bootloader partitioning and factory calibration lock |
| Continuous Read Mode | Reduces instruction overhead with auto-increment addressing - enables true execute-in-place (XIP) from SPI flash in microcontroller-based systems |
| Hardware + Software Write Protection | Combines /WP pin control with SRP and status register bits - provides layered defense against accidental or malicious writes across power cycles |
| JEDEC Standard Identification | Supports ABh, 90h, 92h, and 9Fh instructions for reliable manufacturer (EFh) and device (3012h) ID - simplifies automated BOM verification and firmware detection |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing firmware images and boot code for programmable logic controllers operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile code storage device interfaced via SPI to ARM Cortex-M7 MCU; provides XIP-capable read access during cold start. Use Value: 4KB sector erase enables incremental firmware patching; 20-year data retention ensures integrity over equipment lifetime without battery backup. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Parameter and event log storage peripheral connected to an MSP430 MCU; accessed via Fast Read Dual Output for low-latency retrieval. Use Value: Hardware /WP pin + SRP bit prevents runtime corruption during ESD events; 1µA power-down current extends battery life between measurements. |
| Automotive Infotainment Boot Loader | Smart Meter Firmware Update Buffer |
|
Use Scenario: Hosting primary boot loader and recovery image in automotive head units requiring AEC-Q100-compliant components. IC Role / Device Role / Timing Role: SPI-connected flash memory providing secure, authenticated boot code to SoC during power-on reset sequence. Use Value: Top/bottom block protection isolates boot code (protected) from update region (unprotected); 104MHz clock supports fast boot times under ASIL-B constraints. |
Use Scenario: Acting as intermediate storage for encrypted firmware updates received over RF or PLC links in utility smart meters. IC Role / Device Role / Timing Role: Dual I/O SPI flash used by meter's host MCU to stage and verify updates prior to main flash programming. Use Value: 256-byte page programming completes in <1ms - enables rapid buffering of fragmented OTA packets; 100K-cycle endurance supports multi-year field upgrades. |
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 | 2M-bit SPI flash with 4KB sectors; supports 85MHz max clock; lacks Dual I/O mode and Continuous Read Mode | No native XIP support; slower read throughput limits boot performance in latency-sensitive systems | Choose if Dual I/O and Fast Read Dual Output are unnecessary and cost sensitivity outweighs speed requirements |
| MX25L2006EZN-12G | 2M-bit SPI flash with identical 4KB sector layout; supports 80MHz clock and Dual Output (but not Dual I/O); JEDEC ID differs (C2h/2012h) | Lower max clock reduces peak bandwidth; no BBh instruction limits full-duplex efficiency in high-throughput update scenarios | Prefer when existing design uses Macronix toolchain or requires pin-compatible replacement with minimal firmware changes |
Compared with AT25DF021A-SSHN-B and MX25L2006EZN-12G, W25X20BVSNIG delivers higher read bandwidth (208Mbps vs ≤160Mbps), native Dual I/O support for efficient command/data interleaving, and Continuous Read Mode for true XIP - making it optimal for real-time boot and firmware streaming where latency and throughput are critical.
Availability
W25X20BVSNIG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment boot loaders, smart meter firmware update buffering, and embedded code shadowing requiring stable component supply and long-term lifecycle assurance.
Supply support for W25X20BVSNIG 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, serial flash, and mobile RAM solutions for industrial, communications, and consumer markets.
W25X20BVSNIG belongs to the W25X family of serial NOR flash memories designed specifically for cost-sensitive, space-constrained embedded systems requiring fast, reliable, and low-power non-volatile storage with SPI compatibility.
FAQ
What is the memory organization of the W25X20BVSNIG?
The W25X20BVSNIG contains 2M-bit (256KB) of NOR flash memory, organized into 1,024 programmable pages of 256 bytes each and 64 uniform 4KB erasable sectors. It also supports 32KB and 64KB block erase operations. This structure allows flexible data management - for example, firmware code can reside in protected 64KB blocks while configuration parameters occupy individual 4KB sectors for independent updates. The W25X20BVSNIG does not use NAND architecture or wear leveling; all erase/write cycles are managed explicitly by the host controller.
Does the W25X20BVSNIG support Quad SPI mode?
No, the W25X20BVSNIG does not support Quad SPI (QSPI) mode. It supports only standard SPI (single I/O), Dual Output SPI (3Bh), and Dual I/O SPI (BBh) - using two data lines (IO0 and IO1) for simultaneous read/write operations. Quad mode requires four I/O pins and different instruction sets (e.g., 6Bh for Quad Read), which are not implemented in the W25X20BVSNIG. Devices like the Winbond W25Q20DV do support QSPI, but W25X20BVSNIG is limited to dual-line operation as confirmed in its August 2009 datasheet revision B.
How does hardware write protection work on the W25X20BVSNIG?
Hardware write protection on the W25X20BVSNIG is implemented through the /WP pin in conjunction with the Status Register Protect (SRP) bit. When SRP = 1 and /WP is driven low, all writes to the status register - including Block Protect (BP2–BP0) and Top/Bottom (TB) bits - are blocked. This prevents accidental modification of protection settings during power transients or noise events. The /WP pin has no effect when SRP = 0. The W25X20BVSNIG's /WP pin is active-low and must be pulled high (via external resistor) to allow status register writes when protection is disabled.
What is the purpose of the /HOLD pin on the W25X20BVSNIG?
The /HOLD pin on the W25X20BVSNIG pauses ongoing SPI transactions while /CS remains asserted low. When /HOLD goes low, the DO pin enters high-impedance state and DIO/CLK signals are ignored - preserving internal state (e.g., partial page program or sector erase) until /HOLD returns high. This feature is essential in multi-peripheral SPI buses, such as those shared between flash, sensors, and ADCs, where priority interrupts require temporary bus access. The W25X20BVSNIG resumes exactly where it left off, eliminating need for retransmission or host-side state tracking.
Can the W25X20BVSNIG be used for Execute-in-Place (XIP) applications?
Yes, the W25X20BVSNIG supports true Execute-in-Place (XIP) via its Continuous Read Mode, enabled by Fast Read Dual Output (3Bh) or Fast Read Dual I/O (BBh) instructions. Once initiated, the device auto-increments addresses with minimal instruction overhead - as few as 8 clocks to address memory - allowing microcontrollers to fetch and execute code directly from SPI flash without copying to RAM. This capability is validated in the datasheet's Functional Description section and is widely used in Cortex-M bootloaders. XIP performance depends on host MCU SPI controller support for continuous read timing.
W25X20BVSNIG 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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 104 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
W25X20BVSNIG FAQ
1.How can I place an order for W25X20BVSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X20BVSNIG 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 W25X20BVSNIG reliable?
The price and inventory of W25X20BVSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X20BVSNIG is usually 5 days.
3.What payment methods are accepted for W25X20BVSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X20BVSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X20BVSNIG?
W25X20BVSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X20BVSNIG 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 W25X20BVSNIG?
For technical support, including W25X20BVSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X20BVSNIG requirements.
6.How does Aetrix verify that W25X20BVSNIG is sourced from the original manufacturer or authorized distributors?
All W25X20BVSNIG 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 W25X20BVSNIG meets industry standards.
7.What is the process for return or replacement of W25X20BVSNIG?
All W25X20BVSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25X20BVSNIG, 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 W25X20BVSNIG part is unused and in its original packaging.
Return procedure for W25X20BVSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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