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Winbond Electronics Corporation W25X16AVSNIG
- Part No.:
- W25X16AVSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25X16AVSNIG.pdf
- Description:
- IC FLASH 16MBIT SPI 75MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,040
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Product details
Overview
W25X16AVSNIG from Winbond is a 16 M-bit (2 MB) serial Flash memory IC designed for embedded code storage and data logging in space-constrained systems. It features uniform 4 KB sectors, dual-output SPI interface supporting up to 75 MHz clock (150 Mbps effective), and operates from a single 2.7–3.6 V supply with 5 mA active and 1 µA power-down current. It is commonly used in firmware boot storage for microcontrollers in industrial control modules.
For engineers reviewing the W25X16AVSNIG datasheet, W25X16AVSNIG pinout, W25X16AVSNIG application, or W25X16AVSNIG equivalent, key selection criteria include sector granularity (4 KB), hardware write protection via /WP pin, dual-output read capability (3Bh instruction), and SOIC-150-mil (SN) package compatibility with legacy PCB footprints.
Technical Context
The W25X16AVSNIG implements a standard SPI Mode 0/3 interface with four dedicated signal lines: /CS, CLK, DIO (bidirectional), and DO (dedicated output). Its dual-output mode repurposes the DIO pin as a second data output during Fast Read Dual Output (3Bh), doubling throughput without requiring additional pins.
It integrates a status register with programmable block protection (BP2–BP0), top/bottom select (TB), and status register protect (SRP) bits - enabling fine-grained, non-volatile hardware/software write protection. Erase operations support sector (4 KB), block (64 KB), and chip-wide granularity, with guaranteed ≥100,000 program/erase cycles and 20-year data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 M-bit (2,097,152 bytes), organized as 8,192 × 256-byte pages |
| Sector Size | Uniform 4 KB sectors (512 total), enabling selective firmware update without full chip erase |
| SPI Clock Max | 75 MHz - supports 150 Mbps effective data rate using Fast Read Dual Output (3Bh) |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic systems; no level-shifting required |
| Endurance | ≥100,000 program/erase cycles per sector - suitable for field-upgradable firmware storage |
| Data Retention | 20 years at +85°C - validated for long-life industrial deployments |
| Operating Temp | −40°C to +85°C - qualified for extended-temperature industrial environments |
Pinout & Package
W25X16AVSNIG is packaged in an 8-pin SOIC 150-mil (package code SN), with gull-wing leads and 1.27 mm pitch. This compact surface-mount package supports automated assembly and fits legacy footprints used in cost-sensitive consumer and industrial designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction; controls device selection on shared SPI bus |
| 2 DO | Serial Data Output | Dedicated output pin; delivers data on falling CLK edge; high-impedance when /CS high or /HOLD active |
| 3 /WP | Write Protect Input | Hardware lock for status register; active-low; works with SRP bit to prevent accidental writes to BP/TB configuration |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; requires low-impedance PCB connection to minimize noise coupling |
| 5 DIO | Serial Data I/O | Bidirectional SPI data line; inputs instructions/addresses on rising CLK; outputs data during dual-output reads (3Bh) |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports Mode 0 (CLK idle low) and Mode 3 (CLK idle high); defines data sampling edges |
| 7 /HOLD | Hold Input | Pauses ongoing SPI transaction while /CS remains low; allows bus sharing with other peripherals without losing internal state |
| 8 VCC | Power Supply | Single 2.7–3.6 V supply; internal voltage regulation enables stable operation across full range; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Dual Output SPI (3Bh) | Enables 150 Mbps read throughput by using DIO as second data output - accelerates boot-time code shadowing into RAM |
| Hardware Write Protection | /WP pin + SRP bit combination prevents status register modification during brown-out or noise events - ensures memory integrity |
| Uniform 4 KB Sectors | Allows precise firmware patching and parameter storage without erasing unrelated code sections - reduces update latency and wear |
| Flexible Erase Granularity | Supports sector (4 KB), block (64 KB), and chip-erase - balances speed, endurance, and update flexibility for diverse use cases |
| Low-Power Power-down Mode | 1 µA typical standby current - extends battery life in always-on IoT sensors and portable diagnostic tools |
Applications
| Firmware Boot Storage | Industrial Parameter Logging |
|---|---|
|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in PLCs and HMIs. IC Role / Device Role / Timing Role: Non-volatile code storage with fast sequential read access; dual-output SPI reduces boot time by >40% vs. standard SPI. Use Value: Enables deterministic <500 ms cold-start sequence while maintaining pin count and board area constraints. |
Use Scenario: Recording sensor calibration coefficients, runtime diagnostics, and event timestamps in factory-floor equipment. IC Role / Device Role / Timing Role: Parameter storage with sector-level erase independence - allows updating calibration data without disturbing firmware. Use Value: Eliminates need for external EEPROM; 4 KB sector size matches typical calibration dataset size, minimizing wear. |
| Consumer Device Configuration | Medical Device Settings Backup |
|
Use Scenario: Holding user preferences, display themes, and connectivity profiles in smart home hubs and audio receivers. IC Role / Device Role / Timing Role: Low-power, byte-addressable non-volatile storage accessed infrequently but requiring high reliability. Use Value: 20-year data retention ensures settings persist over product lifetime without backup battery or supercapacitor. |
Use Scenario: Archiving device configuration, usage logs, and safety-critical operational parameters in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe storage with hardware write protection (/WP pin + SRP) preventing corruption during power transients. Use Value: Meets IEC 62304 Class C software requirements for data integrity under fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| W25Q16JVSSIQ | Same density (16 M-bit), but newer generation: quad SPI support, 104 MHz clock, enhanced security registers, and 1.65–3.6 V supply | Required for designs needing faster read/write or secure boot; not drop-in due to different instruction set and status register layout | Select if upgrading from W25X16A for higher performance or security; requires firmware and layout revision |
| AT25DF161-SSHN-B | 16 M-bit serial Flash with 85 MHz max clock, same SOIC-150 package, but uses different status register mapping and lacks dual-output mode | Suitable for cost-sensitive replacements where dual-output is unused; identical pinout and voltage range simplify migration | Choose for direct footprint replacement where existing firmware uses only standard SPI (03h/0Bh reads) and no dual-output dependency |
Compared with W25X16AVSNIG, W25Q16JVSSIQ offers higher bandwidth and security at the cost of firmware compatibility, while AT25DF161-SSHN-B provides pin-identical substitution with reduced feature set but no software changes needed.
Availability
W25X16AVSNIG is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration backup, and consumer electronics parameter logging requiring stable component supply across multi-year production cycles.
Supply support for W25X16AVSNIG 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 NOR Flash, PSRAM, and mobile DRAM for embedded and industrial markets.
The W25X series was designed for cost-sensitive, space-constrained applications requiring reliable code storage and moderate-speed data logging - targeting microcontroller-based systems where parallel Flash footprint and complexity are prohibitive.
FAQ
What is the package type and lead pitch of W25X16AVSNIG?
W25X16AVSNIG uses an 8-pin SOIC package with 150-mil body width (package code SN) and 1.27 mm lead pitch. This is a standard gull-wing surface-mount outline compatible with reflow soldering and widely supported in PCB design libraries.
Does W25X16AVSNIG support quad SPI mode?
No, W25X16AVSNIG does not support quad SPI. It supports standard SPI (single I/O) and dual-output SPI (using DO and DIO simultaneously during Fast Read Dual Output instruction 3Bh). Quad SPI capability was introduced in later Winbond families such as W25Q.
What is the minimum erase unit size for W25X16AVSNIG?
The minimum erase unit size for W25X16AVSNIG is 4 KB - corresponding to one uniform sector. Sector erase (20h instruction) targets individual 4 KB blocks, enabling precise updates without affecting adjacent firmware or data regions.
Can W25X16AVSNIG be used with a 2.5 V supply?
No, W25X16AVSNIG requires a minimum supply voltage of 2.7 V and is rated for 2.7–3.6 V operation. Using 2.5 V violates the absolute maximum ratings and may result in unreliable read/write behavior or failure to enter power-down mode.
How is hardware write protection enabled on W25X16AVSNIG?
Hardware write protection on W25X16AVSNIG is enabled by pulling the /WP pin low *and* setting the Status Register Protect (SRP) bit to '1'. When both conditions are met, the Write Status Register instruction is locked out, preventing changes to block protection bits (BP2–BP0) and TB.
W25X16AVSNIG 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:
- 16Mbit
- Memory Organization:
- 2M 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
W25X16AVSNIG FAQ
1.How can I place an order for W25X16AVSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25X16AVSNIG 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 W25X16AVSNIG reliable?
The price and inventory of W25X16AVSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25X16AVSNIG is usually 5 days.
3.What payment methods are accepted for W25X16AVSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25X16AVSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25X16AVSNIG?
W25X16AVSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25X16AVSNIG 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 W25X16AVSNIG?
For technical support, including W25X16AVSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25X16AVSNIG requirements.
6.How does Aetrix verify that W25X16AVSNIG is sourced from the original manufacturer or authorized distributors?
All W25X16AVSNIG 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 W25X16AVSNIG meets industry standards.
7.What is the process for return or replacement of W25X16AVSNIG?
All W25X16AVSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25X16AVSNIG, 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 W25X16AVSNIG part is unused and in its original packaging.
Return procedure for W25X16AVSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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