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Winbond Electronics Corporation W25Q16DWSSIG
- Part No.:
- W25Q16DWSSIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q16DWSSIG.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
W25Q16DWSSIG from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized as 8,192 × 256-byte pages with 4KB uniform sector erase, used for code storage, XIP execution, and firmware parameter retention in space-constrained embedded systems.
For engineers reviewing the W25Q16DWSSIG datasheet, W25Q16DWSSIG pinout, W25Q16DWSSIG application, or W25Q16DWSSIG equivalent, this page delivers verified electrical specs, SOIC-8 (208-mil) package mapping, Quad Enable (QE) bit dependency, and real-world timing behavior for SPI/QPI mode transitions and erase/program suspend operations.
Technical Context
The W25Q16DWSSIG implements a dual-mode command interface: Standard/Dual/Quad SPI (up to 104MHz CLK) and exclusive QPI mode (enabled via 38h instruction), where all four IO pins carry instruction bits in two clocks instead of eight. Its status register architecture includes non-volatile QE bit (SR2[1]) controlling /WP and /HOLD reassignment to IO2/IO3.
It supports hardware write protection via active-low /WP and /HOLD pins (functional only in SPI modes), volatile/non-volatile status register locking (SRP0/SRP1), and four 256-byte security registers with OTP locks. Erase granularity spans 4KB sectors (512 total), 32KB blocks (128), and 64KB blocks (32), with suspend/resume capability during erase or program cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 M-bit (2,097,152 bytes), organized as 8,192 × 256-byte programmable pages |
| Supply Voltage | 1.65V to 1.95V - enables direct integration into 1.8V logic domains without level shifting |
| Max Clock Frequency | 104 MHz SPI clock - delivers up to 416 MB/s effective throughput in Quad I/O Fast Read mode |
| Erase Granularity | 4KB sector (512 sectors), 32KB block (128 blocks), 64KB block (32 blocks) - supports fine-grained firmware update partitioning |
| Endurance & Retention | 100,000 program/erase cycles minimum; 20-year data retention at +85°C - suitable for field-upgradable industrial firmware |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature industrial control and automotive body electronics |
| Interface Modes | Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3), QPI (all 4 IOs for instructions/data) - mode selection governs pin function mapping |
Pinout & Package
W25Q16DWSSIG is supplied in an 8-pin SOIC 208-mil package (package code SS), with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable: high = device deselected (high-Z outputs, standby current); low = active communication window |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional I/O1 in Dual/Quad SPI/QPI - requires QE=1 for Quad use |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware write lock for status register when active low; becomes IO2 in Quad SPI/QPI after QE=1 set |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance for stable read/write margins |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional I/O0 in Dual/Quad SPI/QPI - required for instruction/address loading |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference: rising edge for input sampling, falling edge for output valid - supports Mode 0/3 |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O | Pauses ongoing transfer while /CS remains low; becomes IO3 in Quad SPI/QPI after QE=1 set |
| 8 VCC | Power Supply | 1.65–1.95V supply - must ramp monotonically with /CS tracking per power-up sequencing requirements |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead by 75% vs Standard SPI (2 clocks vs 8 for opcode), enabling deterministic XIP latency in real-time systems |
| Erase/Program Suspend & Resume | Allows background firmware update to pause mid-operation for high-priority interrupt service, then resume without data loss |
| 64-bit Unique Serial Number | Factory-programmed per-device ID enables secure boot binding, anti-cloning, and traceable firmware versioning |
| Four 256-byte Security Registers | OTP-lockable storage for cryptographic keys, calibration data, or license tokens - isolated from main array and protected by SRP bits |
| Continuous Read with Wrap | Enables burst reads across 8/16/32/64-byte boundaries without address wrap-around penalty - critical for cache-line-aligned XIP |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Storing boot loader, application firmware, and configuration parameters in a DIN-rail mounted PLC with no external RAM. IC Role / Device Role / Timing Role: Primary non-volatile code storage enabling Execute-in-Place (XIP) directly from SPI bus using Quad I/O Fast Read mode. Use Value: Eliminates need for parallel NOR flash or external RAM buffer; 4KB sector erase allows atomic firmware patching without full chip erase. |
Use Scenario: Holding vehicle-specific calibration tables, ECU variant identification, and diagnostic event logs in a BCM operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Parameter and log storage with hardware write protection (/WP pin) and 20-year data retention at elevated temperature. Use Value: Prevents accidental overwrites during CAN-based firmware updates; security registers store encrypted VIN-binding keys. |
| Medical Infusion Pump Boot Image | Smart Home Gateway OTA Storage |
|
Use Scenario: Storing certified, immutable boot image and safety-critical runtime firmware in Class II medical device with IEC 62304 compliance requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot memory with 100K-cycle endurance and OTP-locked security registers for cryptographic keys. Use Value: Supports firmware rollback protection and audit-trail logging via dedicated 4KB sectors; SUS bit enables safe interrupt handling during updates. |
Use Scenario: Hosting compressed OTA firmware images and version metadata in battery-powered smart home hubs with constrained PCB area. IC Role / Device Role / Timing Role: High-density, low-power storage using 1.8V operation and 1µA power-down current to extend battery life between updates. Use Value: 50 MB/s continuous read rate accelerates OTA apply time; WSON-compatible pinout allows drop-in replacement in space-limited layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L1606EM2I-12G | Same density (16M-bit), 3V supply (2.7–3.6V); lacks QPI mode and security registers; max SPI clock 80MHz | Requires level-shifting in 1.8V systems; no hardware-accelerated XIP or unique ID support | Select only if legacy 3V design exists and QPI/security features are unnecessary |
| S25FL116K0XMFI041 | 16M-bit, 1.8V supply, supports Octal DTR mode (up to 200MHz DDR); includes SFDP and 4-byte addressing | Higher bandwidth but larger footprint (16-pin SOIC); requires different initialization sequence and driver support | Choose for future-proof designs needing >104MHz throughput or migration path to 32M-bit+ densities |
Compared with W25Q16DWSSIG, MX25L1606EM2I-12G trades QPI and security for broader voltage tolerance, while S25FL116K0XMFI041 adds octal DDR performance at the cost of pin count and software complexity - W25Q16DWSSIG balances feature richness, 1.8V compatibility, and SOIC-8 simplicity for mainstream embedded use.
Availability
W25Q16DWSSIG is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, medical infusion pumps, smart home gateways, and IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and guaranteed 1.8V serial flash compatibility.
Supply support for W25Q16DWSSIG 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 SPI NOR/NAND flash, RAM, and mobile DRAM, with global manufacturing and quality certifications.
The W25Q series targets embedded systems requiring high-speed, low-voltage serial flash for code execution and data storage - designed specifically to replace parallel NOR flash while minimizing board space and power consumption.
FAQ
What is the maximum SPI clock frequency supported by the W25Q16DWSSIG?
The W25Q16DWSSIG supports up to 104 MHz for Standard, Dual, and Quad SPI clock inputs. At this frequency, Quad I/O Fast Read achieves an effective throughput of 416 MB/s (104 MHz × 4 bits/cycle). This rating is specified under VCC = 1.7–1.95 V and TA = –40°C to +85°C conditions per the official datasheet revision J.
Does the W25Q16DWSSIG support Execute-in-Place (XIP) operation?
Yes, the W25Q16DWSSIG supports true XIP via its Continuous Read Mode and Quad I/O instructions (e.g., EBh, E7h), which minimize instruction overhead and deliver deterministic access latency. The device's 4KB sector architecture and suspend/resume capability ensure safe, atomic firmware updates during live XIP execution - a key requirement confirmed in section 1. GENERAL DESCRIPTION.
How is Quad SPI mode enabled on the W25Q16DWSSIG?
Quad SPI mode is enabled by setting the non-volatile Quad Enable (QE) bit (bit 1 of Status Register-2) via the Write Status Register (01h) instruction. Once QE = 1, the /WP and /HOLD pins become IO2 and IO3 respectively. This configuration is retained across power cycles and is mandatory before issuing any Quad SPI or QPI commands - detailed in sections 4.2 and 7.1.10 of the datasheet.
What package type does the W25Q16DWSSIG use, and is it RoHS compliant?
W25Q16DWSSIG uses an 8-pin SOIC 208-mil package (package code SS), with gull-wing leads and Pb-free (RoHS-compliant) finish. This is explicitly listed in Table 10.1 "Valid Part Numbers and Top Side Marking" and section 9.2 "8-Pin SOIC 208-mil (Package Code SS)" of the September 2014 datasheet revision J.
Can the W25Q16DWSSIG be used with a 3.3V microcontroller SPI interface?
No - the W25Q16DWSSIG operates exclusively at 1.65–1.95V and is not 3.3V-tolerant. Direct connection to a 3.3V MCU SPI port will damage the device. Level translation (e.g., TXB0104 or discrete MOSFET buffers) is required for interoperability, as stated in Absolute Maximum Ratings (section 8.1) and Operating Ranges (section 8.2).
W25Q16DWSSIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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
W25Q16DWSSIG FAQ
1.How can I place an order for W25Q16DWSSIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q16DWSSIG 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 W25Q16DWSSIG reliable?
The price and inventory of W25Q16DWSSIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q16DWSSIG is usually 5 days.
3.What payment methods are accepted for W25Q16DWSSIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q16DWSSIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q16DWSSIG?
W25Q16DWSSIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q16DWSSIG 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 W25Q16DWSSIG?
For technical support, including W25Q16DWSSIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q16DWSSIG requirements.
6.How does Aetrix verify that W25Q16DWSSIG is sourced from the original manufacturer or authorized distributors?
All W25Q16DWSSIG 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 W25Q16DWSSIG meets industry standards.
7.What is the process for return or replacement of W25Q16DWSSIG?
All W25Q16DWSSIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q16DWSSIG, 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 W25Q16DWSSIG part is unused and in its original packaging.
Return procedure for W25Q16DWSSIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q16DWSSIG Tags
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