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Winbond Electronics Corporation W25Q16DWSNIG
- Part No.:
- W25Q16DWSNIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q16DWSNIG.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
W25Q16DWSNIG from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory supporting Standard/Dual/Quad SPI and QPI interfaces. It delivers up to 104MHz SPI clock rate (416MHz equivalent in Quad I/O), features uniform 4KB sector erase, 32KB/64KB block erase, and supports execute-in-place (XIP) for code storage and boot loading in space-constrained embedded systems.
For engineers reviewing the W25Q16DWSNIG datasheet, W25Q16DWSNIG pinout, W25Q16DWSNIG application, or W25Q16DWSNIG equivalent, key selection criteria include its 1.65–1.95V supply range, <1µA power-down current, JEDEC ID compatibility, 64-bit unique serial number, and hardware write protection via /WP and /HOLD pins with configurable sector-level locking.
Technical Context
The W25Q16DWSNIG implements a flexible SPI command architecture with mode-selectable operation: Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), and QPI (all four IOs for instruction + data). Its internal logic requires the non-volatile Quad Enable (QE) bit in Status Register-2 to be set before /WP and /HOLD become functional as IO2 and IO3.
It integrates dual status registers (SR1/SR2) with programmable protection bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1), erase/program suspend/resume capability, and four 256-byte security registers with OTP locks. The device supports continuous read with wrap modes (8/16/32/64-byte) and achieves 50MB/s effective throughput using Fast Read Quad I/O (EBh) at 104MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 M-bit (2,097,152 bytes), organized as 8,192 × 256-byte pages |
| Supply Voltage | 1.65V to 1.95V - enables direct integration into low-power 1.8V system rails without level-shifting |
| Max Clock Frequency | 104 MHz SPI - supports 416 MHz effective Quad I/O bandwidth for XIP-critical boot code fetch |
| Erase Granularity | Uniform 4KB sectors (512 total), 32KB blocks (32), 64KB blocks (16) - enables fine-grained firmware update partitioning |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention - suitable for field-upgradable embedded firmware |
| Power Consumption | 4 mA active current (typ.), <1 µA power-down (typ.) - meets ultra-low-power IoT and battery-backed applications |
| Security Features | 64-bit unique ID, four 256-byte security registers with OTP locks, hardware/software write protection - supports secure boot and credential storage |
Pinout & Package
W25Q16DWSNIG uses the 8-pin SOIC 150-mil package (package code SN), with gull-wing leads and standard surface-mount footprint. Pin 1 is marked with a notch or dot; pin numbering follows counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable signal; places DO/IO pins in high-impedance state when deasserted to isolate bus |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional I/O1 in Dual/Quad/QPI modes after QE=1 |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for status register writes; repurposed as IO2 in Quad/QPI modes when QE=1 |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance for stable timing and noise immunity |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional I/O0 in Dual/Quad/QPI modes after QE=1 |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference for all SPI/QPI operations; supports Mode 0 and Mode 3 polarity/phasing |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing read/write without deselecting device; repurposed as IO3 in Quad/QPI modes when QE=1 |
| 8 VCC | Power Supply | 1.65–1.95V core supply; requires local 100nF ceramic decoupling adjacent to pin for transient stability |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead from 8 clocks to 2 clocks per command, enabling faster XIP startup and deterministic latency |
| Continuous Read with Wrap | Supports 8/16/32/64-byte burst wraps - eliminates address increment overhead for sequential buffer fills |
| Erase/Program Suspend & Resume | Allows background interrupt handling during long erase cycles (e.g., 64KB block erase ~100ms), preserving real-time responsiveness |
| Top/Bottom Sector Protection | Enables independent locking of boot code (top) and configuration data (bottom) using TB and BP bits - prevents accidental overwrite |
| Volatile & Non-Volatile Status Control | Separate volatile write-enable latch (WEL) and non-volatile protection bits (SRP0/SRP1) - allows safe field updates without permanent lock-in |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Primary non-volatile code storage with execute-in-place (XIP) support for fast cold-boot recovery and field firmware updates. Use Value: 4KB sector granularity enables atomic patching of control algorithms without erasing full firmware image; 100K-cycle endurance ensures >10 years of field reprogramming. |
Use Scenario: Hosting boot loader and OS kernel for head-unit microcontrollers in automotive infotainment systems. IC Role / Device Role / Timing Role: High-speed Quad SPI interface provides 50MB/s sustained read throughput to feed ARM Cortex-A cores directly from flash. Use Value: QPI mode reduces instruction latency by 75% versus Standard SPI, accelerating boot time by ~120ms; JEDEC ID and Unique ID support secure chain-of-trust verification. |
| IoT Edge Sensor Node Configuration | Medical Diagnostic Device Data Log |
Use Scenario: Retaining sensor calibration profiles, network credentials, and OTA update staging buffers in battery-powered wireless nodes. IC Role / Device Role / Timing Role: Low-power memory with <1µA deep-sleep current and hardware write protection for tamper-resistant parameter storage. Use Value: Hardware /WP pin + BP bits prevent accidental overwrites during brown-out conditions; 20-year data retention guarantees integrity across device lifetime. |
Use Scenario: Capturing time-stamped diagnostic waveforms and patient settings in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Secure, sector-protected storage for HIPAA-compliant logs with cryptographic key isolation in dedicated security registers. Use Value: Four 256-byte OTP-locked security registers store encryption keys separately from user data; CMP bit prevents unauthorized register modification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q16JVSNIQ | Same density and pinout, but uses newer 1.65–2.0V VCC range and includes enhanced security (Secure OTP, 4K-Sector Lock) | Required for new designs needing AEC-Q100 Grade 2 qualification or extended voltage margin | Select W25Q16JVSNIQ for automotive-grade reliability; W25Q16DWSNIG remains valid for industrial cost-sensitive designs |
| Micron MT25QL128ABA1EW9-0SIT | 128M-bit (16MB) capacity, 1.7–2.0V supply, supports DTR mode and octal DDR; not pin-compatible | Suitable for systems requiring larger code storage and higher bandwidth, but demands PCB redesign and driver changes | Choose MT25QL128ABA1EW9-0SIT only when scaling beyond 2MB or requiring DTR timing; not a drop-in replacement |
Compared with W25Q16JVSNIQ, W25Q16DWSNIG offers proven industrial reliability at lower unit cost but lacks AEC-Q100 qualification and advanced security features; versus MT25QL128ABA1EW9-0SIT, it provides pin-compatible 2MB density with simpler driver integration but lower maximum bandwidth and no DTR support.
Availability
W25Q16DWSNIG is available at Aetrix Electronics and suitable for industrial control, automotive infotainment, and medical diagnostics applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for W25Q16DWSNIG 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 SPI NOR/NAND flash, RAM, and mobile DRAM.
The W25Q series targets embedded systems requiring high-speed, low-voltage, and secure serial flash for code execution, firmware storage, and configuration data - optimized for MCU-based designs with limited PCB area and power budget.
FAQ
What is the operating voltage range for W25Q16DWSNIG?
The W25Q16DWSNIG operates from 1.65V to 1.95V. This narrow 1.8V nominal range ensures compatibility with modern low-power microcontrollers and eliminates the need for external level shifters in 1.8V system designs. Operation outside this range may cause unreliable read/write behavior or permanent damage.
Does W25Q16DWSNIG support execute-in-place (XIP) functionality?
Yes, W25Q16DWSNIG supports true XIP via Fast Read Quad I/O (EBh) and QPI instructions, achieving up to 50MB/s continuous throughput. Its 8-clock continuous read mode minimizes instruction overhead, allowing ARM Cortex-M and RISC-V cores to execute code directly from flash without copying to RAM.
How is hardware write protection implemented on W25Q16DWSNIG?
W25Q16DWSNIG implements hardware write protection through the /WP pin (active-low) combined with status register bits (BP2–BP0, TB, SEC). When /WP is held low and BP bits are set, writes to protected sectors or status registers are blocked regardless of software commands - providing fail-safe protection against firmware corruption.
What package type does W25Q16DWSNIG use, and is it RoHS compliant?
W25Q16DWSNIG uses the 8-pin SOIC 150-mil package (SN code) with gull-wing leads. It is RoHS compliant and halogen-free per Winbond's product change notices, meeting IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) for standard reflow assembly.
Can W25Q16DWSNIG be used in QPI mode immediately after power-up?
No. W25Q16DWSNIG powers up in Standard SPI mode. To enter QPI mode, the host must first set the Quad Enable (QE) bit in Status Register-2 using Write Status Register (01h), then issue the Enable QPI (38h) command. Both steps are required; omitting either results in command rejection or bus hang.
W25Q16DWSNIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 40µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q16DWSNIG FAQ
1.How can I place an order for W25Q16DWSNIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q16DWSNIG 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 W25Q16DWSNIG reliable?
The price and inventory of W25Q16DWSNIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q16DWSNIG is usually 5 days.
3.What payment methods are accepted for W25Q16DWSNIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q16DWSNIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q16DWSNIG?
W25Q16DWSNIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q16DWSNIG 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 W25Q16DWSNIG?
For technical support, including W25Q16DWSNIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q16DWSNIG requirements.
6.How does Aetrix verify that W25Q16DWSNIG is sourced from the original manufacturer or authorized distributors?
All W25Q16DWSNIG 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 W25Q16DWSNIG meets industry standards.
7.What is the process for return or replacement of W25Q16DWSNIG?
All W25Q16DWSNIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q16DWSNIG, 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 W25Q16DWSNIG part is unused and in its original packaging.
Return procedure for W25Q16DWSNIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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