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Winbond Electronics Corporation W25Q16VSSIG
- Part No.:
- W25Q16VSSIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q16VSSIG.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,820
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Product details
Overview
W25Q16VSSIG from Winbond is a 16 M-bit (2 MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces. It features 8,192 × 256-byte programmable pages, 4 KB uniform sectors, and operates on a single 2.7–3.6 V supply with 4 mA active current and <1 µA power-down current. It is used for code shadowing, XIP execution, and firmware storage in microcontroller-based embedded systems.
For engineers reviewing the W25Q16VSSIG datasheet, W25Q16VSSIG pinout, W25Q16VSSIG application, or W25Q16VSSIG equivalent, key selection considerations include Quad SPI enable (QE bit), hardware write protection via /WP pin, 80 MHz max clock frequency, sector/block erase flexibility, and SOIC-8 (208-mil) package compatibility with legacy PCB footprints.
Technical Context
The W25Q16VSSIG implements a SPI-compatible command set with three operational modes: Standard (DI/DO), Dual (IO0/IO1), and Quad (IO0–IO3), where Quad mode requires non-volatile QE bit = 1 in Status Register-2. Its internal architecture includes a 256-byte page buffer, hierarchical erase segmentation (4 KB sectors / 32 KB & 64 KB blocks), and dual status registers for protection configuration.
Write protection combines volatile (WEL latch) and non-volatile controls (SRP0/SRP1, BP2–BP0, TB, SEC), enabling selective hardware- and software-based locking of top/bottom memory regions. The /HOLD and /WP pins serve dual roles: dedicated control signals in Standard/Dual mode, and IO2/IO3 in Quad mode-requiring explicit QE configuration before switching interface modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 M-bit (2,097,152 bytes), organized as 8,192 × 256-byte pages |
| Interface Support | Standard SPI (4-wire), Dual SPI (2 I/O lines), Quad SPI (4 I/O lines); QE bit required for Quad mode |
| Max Clock Frequency | 80 MHz - enables 320 MHz equivalent data rate in Quad SPI Fast Read mode |
| Erase Granularity | 4 KB sectors (512 total), 32 KB blocks (64 total), 64 KB blocks (32 total), full chip erase |
| Endurance & Retention | ≥100,000 program/erase cycles; ≥20 years data retention at +25°C |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic systems without level shifting |
| Power Consumption | 4 mA typical active current; <1 µA typical power-down current - suitable for battery-backed applications |
Pinout & Package
W25Q16VSSIG is packaged in an 8-pin SOIC (208-mil width, package code SS), with pin 1 marked by a notch or dot. This surface-mount package supports reflow soldering and fits standard 0.3-inch-wide PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; device enters high-impedance output state when high; must transition high→low after power-up to accept instructions |
| 2 DO (IO1) | Data Output / I/O Line 1 | Unidirectional output in Standard SPI; bidirectional I/O in Dual/Quad SPI; used for read data and status |
| 3 /WP (IO2) | Write Protect Input / I/O Line 2 | Hardware write protect for status register when QE=0; becomes IO2 in Quad SPI (QE=1) |
| 4 GND | Ground Reference | System ground return path; must be low-impedance and decoupled near VCC pin |
| 5 DI (IO0) | Data Input / I/O Line 0 | Unidirectional input in Standard SPI; bidirectional I/O in Dual/Quad SPI; carries instructions, addresses, and write data |
| 6 CLK | Serial Clock Input | Edge-triggered timing source; supports SPI Modes 0 and 3; max 80 MHz frequency |
| 7 /HOLD (IO3) | Hold Input / I/O Line 3 | Pauses ongoing SPI transaction when low (active); becomes IO3 in Quad SPI (QE=1); not functional during Quad mode |
| 8 VCC | Power Supply | 2.7–3.6 V main supply; requires local 0.1 µF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI XIP Support | Enables true execute-in-place operation with Fast Read Quad I/O (EBh), reducing boot latency and external RAM dependency |
| Flexible Erase Architecture | Independent 4 KB sector erase allows fine-grained firmware update partitioning without disturbing adjacent configuration or calibration data |
| Dual-Mode Hardware Write Protection | /WP pin + SRP bits provide overlapping protection layers: immediate hardware lock and persistent software-configurable region lockdown |
| Continuous Read Mode | Reduces instruction overhead to ≤8 clocks per 24-bit address, enabling efficient sequential access comparable to parallel flash |
| 64-Bit Unique ID | Factory-programmed serial number per unit supports secure firmware binding, device authentication, and field inventory tracking |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile code storage and runtime parameter retention; provides deterministic boot timing via Quad SPI XIP capability. Use Value: 4 KB sector erase enables over-the-air updates to individual function modules without erasing safety-critical calibration data stored in adjacent sectors. | Use Scenario: Holding certified bootloader and diagnostic firmware in Class II medical instruments requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure boot memory with unique ID verification; supports encrypted firmware validation prior to execution. Use Value: 64-bit unique ID and OTP-capable protection bits allow cryptographic binding of firmware images to specific units, meeting IEC 62304 traceability requirements. |
| Automotive Infotainment UI Assets | Smart Energy Meter Firmware |
Use Scenario: Caching graphical assets (fonts, icons, UI bitmaps) in automotive head units where fast random access and low power are critical. IC Role / Device Role / Timing Role: High-bandwidth asset repository accessed via Quad SPI; leverages 320 MHz equivalent throughput for rapid GUI rendering. Use Value: Fast Read Quad Output (6Bh) delivers >40 MB/s sustained read rates, eliminating frame stutter during dynamic UI transitions. | Use Scenario: Storing tariff tables, communication stack binaries, and regulatory compliance logs in ANSI C12.22-compliant smart meters deployed in unattended outdoor locations. IC Role / Device Role / Timing Role: Long-life, low-power firmware and data log storage; operates reliably across –40°C to +85°C ambient range. Use Value: <1 µA power-down current extends battery life in backup-powered meters; 20-year data retention ensures 15+ year field deployment without data loss. |
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 |
|---|---|---|---|
| MX25L1606E/MX25L1633F | Same density (16 M-bit), SOIC-8 package, but supports only Standard/Dual SPI (no Quad I/O); lacks QE bit and IO2/IO3 functionality | Not suitable for XIP or high-throughput asset loading requiring Quad I/O; limited to legacy SPI controllers without Quad support | Select when Quad SPI is unnecessary and cost sensitivity outweighs performance needs; verify /HOLD and /WP pin behavior matches design |
| S25FL116K | 16 M-bit Serial Flash with Quad SPI and SFDP support; includes configurable dummy cycle and latency tuning; slightly higher VCC min (2.7 V same) | Better suited for systems requiring dynamic read latency adjustment or JEDEC SFDP-based auto-configuration | Prefer when migrating to scalable Cypress/Infineon flash families or needing SFDP descriptor-driven initialization |
Compared with MX25L1606E and S25FL116K, the W25Q16VSSIG offers native Quad I/O with fixed 80 MHz timing and simpler QE activation, making it optimal for cost-constrained, fixed-function embedded designs where guaranteed XIP performance and minimal driver complexity are prioritized.
Availability
W25Q16VSSIG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, and automotive infotainment UI assets requiring stable component supply, long-term lifecycle assurance, and consistent SOIC-8 footprint compatibility.
Supply support for W25Q16VSSIG 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 flash, PSRAM, and mobile DRAM.
The W25Q series was designed for embedded systems demanding high-speed code execution, robust data integrity, and space-constrained packaging - targeting applications from IoT edge nodes to automotive ECUs and industrial HMI.
FAQ
What is the package type and lead count of the W25Q16VSSIG?
The W25Q16VSSIG uses an 8-pin SOIC package with 208-mil width (package code SS). It has two rows of leads, 4 per side, with standard 0.050-inch pitch. This footprint is compatible with legacy PCB layouts designed for earlier Winbond W25X and W25Q series devices, enabling drop-in replacement in many existing designs without board revision.
Does the W25Q16VSSIG support Quad SPI mode out of the box?
No - the W25Q16VSSIG requires the Quad Enable (QE) bit in Status Register-2 to be set to '1' before Quad SPI operation is functional. By default, QE = 0 at power-up, so Standard SPI is active. Setting QE requires issuing a Write Status Register instruction (01h) with appropriate SRP and WEL conditions met. Once set, QE persists across power cycles unless explicitly cleared.
Can the /WP and /HOLD pins be used for hardware write protection in Quad SPI mode?
No - when QE = 1, the /WP and /HOLD pins become IO2 and IO3 respectively and lose their dedicated hardware protection functions. Hardware write protection via /WP is only available in Standard and Dual SPI modes (QE = 0). In Quad mode, write protection must rely solely on software-configured status register bits (SRP0/SRP1, BP2–BP0).
What is the minimum and maximum supply voltage for reliable operation of the W25Q16VSSIG?
The W25Q16VSSIG operates reliably from 2.7 V to 3.6 V DC. Operation below 2.7 V may cause undefined behavior, including failed writes or corrupted status register reads. The device includes built-in power-on reset circuitry that holds the chip in reset until VCC exceeds the threshold VWI (~2.6 V), ensuring safe initialization even with slow-ramping supplies.
How many program/erase cycles does the W25Q16VSSIG guarantee, and what is its data retention specification?
The W25Q16VSSIG guarantees ≥100,000 program/erase cycles per sector and ≥20 years of data retention at +25°C ambient temperature. Retention degrades logarithmically with temperature; at +85°C, retention is specified for ≥10 years. These values are measured per JEDEC JESD22-A117 and apply to all 4 KB sectors across the full memory array of the W25Q16VSSIG.
W25Q16VSSIG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 50µs, 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
W25Q16VSSIG FAQ
1.How can I place an order for W25Q16VSSIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q16VSSIG 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 W25Q16VSSIG reliable?
The price and inventory of W25Q16VSSIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q16VSSIG is usually 5 days.
3.What payment methods are accepted for W25Q16VSSIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q16VSSIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q16VSSIG?
W25Q16VSSIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q16VSSIG 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 W25Q16VSSIG?
For technical support, including W25Q16VSSIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q16VSSIG requirements.
6.How does Aetrix verify that W25Q16VSSIG is sourced from the original manufacturer or authorized distributors?
All W25Q16VSSIG 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 W25Q16VSSIG meets industry standards.
7.What is the process for return or replacement of W25Q16VSSIG?
All W25Q16VSSIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q16VSSIG, 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 W25Q16VSSIG part is unused and in its original packaging.
Return procedure for W25Q16VSSIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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