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Winbond Electronics Corporation W25Q16JWSNAQ
- Part No.:
- W25Q16JWSNAQ
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
W25Q16JWSNAQ.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,574
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Product details
Overview
W25Q16JWSNAQ from Winbond is a 1.8V, 16M-bit (2MB) serial NOR flash memory with Dual/Quad SPI interface, supporting up to 133MHz Quad I/O clocking for 66MB/s continuous read throughput. It features uniform 4KB sectors (512 total), 32KB/64KB blocks, and operates across -40°C to +85°C industrial temperature range. Used for XIP code execution, firmware storage, and parameter retention in space-constrained embedded systems.
For engineers reviewing the W25Q16JWSNAQ datasheet, W25Q16JWSNAQ pinout, W25Q16JWSNAQ application, or W25Q16JWSNAQ equivalent, key selection criteria include 1.65–1.95V supply compatibility, Quad Enable (QE) bit configuration, /WP and /HOLD pin dual-function behavior in Quad mode, and sector-level hardware write protection via BP/TB/CMP bits.
Technical Context
The W25Q16JWSNAQ implements a standard SPI bus with Mode 0 and Mode 3 support, extended to Dual and Quad I/O modes using shared bidirectional pins (IO0–IO3). Its architecture enables concurrent instruction/address/data transfer on multiple lines, achieving 4× data rate over standard SPI when QE=1 and Fast Read Quad I/O (EBh) is used.
It integrates three volatile/non-volatile status registers controlling erase/write protection (BP2–BP0, TB, SEC, CMP, SRP/SRL), Quad Enable (QE), output driver strength (DRV1/DRV0), and security register locks (LB1–LB3). Erase/program suspend/resume and individual 4KB sector lock/unlock (36h/39h) provide deterministic flash management in real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 M-bit (2,097,152 bytes), organized as 8192 × 256-byte programmable pages |
| Supply Voltage | 1.65V to 1.95V - enables direct integration with 1.8V logic domains without level shifting |
| Max Clock Frequency | 133 MHz Quad I/O - delivers 532 Mbps effective throughput using EBh instruction |
| Erase Granularity | 4KB sector / 32KB block / 64KB block / full chip - supports fine-grained firmware partitioning |
| Endurance & Retention | 100,000 program-erase cycles minimum; >20 years data retention at 85°C |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade reliability in harsh environments |
| Security Features | 64-bit unique ID, SFDP register, three 256-byte security registers, OTP-lockable LB bits |
Pinout & Package
W25Q16JWSNAQ uses an 8-pin SOIC 150-mil package (Package Code SN), with pin 1 marked by a notch or dot. All pins are electrically identical across SOIC, USON, WSON, XSON, and WLCSP variants per datasheet Section 3.3 and 3.5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable; high-impedance DO/IOs when deasserted; must track VCC during power-up/down |
| DO (IO1) | Data Output / Quad I/O Line 1 | Unidirectional output in Standard SPI; bidirectional IO1 in Dual/Quad mode; used with DI for dual-speed reads |
| /WP (IO2) | Write Protect Input / Quad I/O Line 2 | Hardware write lock for status register when active low; becomes IO2 in Quad mode (QE=1) |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required within 10 mm of VCC pin |
| DI (IO0) | Data Input / Quad I/O Line 0 | Unidirectional input in Standard SPI; bidirectional IO0 in Dual/Quad mode; carries instructions/addresses |
| CLK | Serial Clock Input | Edge-triggered timing reference; supports Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) |
| /HOLD (IO3) | Hold Input / Quad I/O Line 3 | Pauses ongoing transfers when low (Standard/Dual); becomes IO3 in Quad mode (QE=1); not available as /RESET |
| VCC | Power Supply | 1.65–1.95V core supply; requires 1µF ceramic + 0.1µF ceramic decoupling per datasheet Figure 58 |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI with QE bit | Non-volatile Status Register-2 bit enables 4-line I/O operation; IO2 (/WP) and IO3 (/HOLD) repurposed automatically |
| Individual Sector Lock | 32 top/bottom 4KB sectors and 62 × 64KB blocks each have dedicated lock bits (36h/39h) - prevents accidental overwrite |
| Erase/Program Suspend | 75h/7Ah instructions pause background erase/program to service urgent reads - critical for real-time latency control |
| Security Register Set | Three 256-byte OTP-capable registers store keys, calibration data, or secure boot parameters - locked via LB1–LB3 bits |
| JEDEC SFDP Support | Standardized 5Ah read returns configurable parameters (timing, voltage, density) - enables automatic driver initialization |
Applications
| IoT Edge Node Firmware Storage | Industrial PLC Boot Memory |
|---|---|
|
Use Scenario: Storing signed firmware images and OTA update payloads in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Non-volatile code and configuration storage with XIP-capable Quad SPI interface for fast boot. Use Value: 133MHz Quad I/O enables sub-100ms firmware load; 4KB sector erase allows atomic OTA patching without full chip erase. |
Use Scenario: Holding bootloader, runtime configuration, and diagnostic logs in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Industrial-grade persistent memory with hardware write protection against EMI-induced corruption. Use Value: /WP pin + BP/TB bits protect bootloader region; -40°C to +85°C rating ensures operation inside sealed enclosures. |
| Medical Device Parameter Archive | Automotive Infotainment UI Assets |
|
Use Scenario: Retaining calibrated sensor offsets, usage history, and audit trails in Class II medical instruments. IC Role / Device Role / Timing Role: Secure, long-retention data vault with 64-bit unique ID for device traceability. Use Value: Three 256-byte security registers store encrypted calibration keys; >20-year retention meets FDA data integrity requirements. |
Use Scenario: Hosting compressed GUI assets, font tables, and voice prompt audio in head unit displays. IC Role / Device Role / Timing Role: High-throughput serial flash for streaming multimedia assets via Quad I/O. Use Value: 66MB/s read bandwidth sustains 720p video overlay rendering; uniform 4KB sectors simplify asset partitioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L1633FZC-12G | 3V supply (2.7–3.6V); no /HOLD pin repurposing in Quad mode; lacks SFDP register | Requires level-shifting for 1.8V systems; no auto-discovery of timing parameters | Select only if legacy 3V design exists and Quad I/O timing margin is sufficient |
| S25FL132K0XMFI010 | 1.7–2.0V supply; includes built-in ECC; supports octal DTR mode beyond Quad | Better bit-error resilience for high-temp automotive use; higher pin count (16-pin SOIC) | Prefer for ASIL-B systems needing error correction; avoid if PCB layout constrained to 8-pin footprint |
Compared with MX25L1633FZC-12G and S25FL132K0XMFI010, W25Q16JWSNAQ offers optimal balance of 1.8V compatibility, Quad I/O performance, and 8-pin SOIC footprint - making it ideal for cost-sensitive, space-limited industrial designs where SFDP-driven driver portability matters.
Availability
W25Q16JWSNAQ is available at Aetrix Electronics and suitable for IoT edge node firmware storage, industrial PLC boot memory, and medical device parameter archive applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature compliance.
Supply support for W25Q16JWSNAQ 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 serial flash, RAM, and mobile DRAM, serving industrial, communications, and consumer markets since 1987.
The W25Q16JW series targets resource-constrained embedded systems needing high-speed, low-voltage serial flash with robust security and flexible erase architecture - optimized for code execution, firmware updates, and secure data logging.
FAQ
What is the function of the /HOLD pin on W25Q16JWSNAQ, and how does it behave in Quad SPI mode?
The /HOLD pin on W25Q16JWSNAQ pauses ongoing SPI operations when pulled low while /CS is active, placing DO in high-impedance and ignoring CLK/DI signals. In Quad SPI mode (QE=1), this pin becomes IO3 and loses its hold functionality - the datasheet explicitly states /HOLD is unavailable during Quad I/O operation. Therefore, W25Q16JWSNAQ users must disable /HOLD control before enabling Quad mode and rely on software flow control instead.
Does W25Q16JWSNAQ support hardware reset via a dedicated /RESET pin?
No, W25Q16JWSNAQ does not include a dedicated hardware /RESET pin. The datasheet confirms that /RESET is only available on SOIC-16 and TFBGA packages - not on the 8-pin SOIC 150-mil variant used by W25Q16JWSNAQ. System-level reset must be implemented via software using the Enable Reset (66h) followed by Reset (99h) instruction sequence, which takes ~30µs to complete. This applies strictly to W25Q16JWSNAQ and is verified in Sections 4.6 and 6.4 of the June 2021 Revision G datasheet.
How is write protection implemented on W25Q16JWSNAQ, and what combinations are supported?
W25Q16JWSNAQ implements three-tiered write protection: (1) Software-based via Status Register bits (BP2–BP0, TB, SEC, CMP, SRP/SRL); (2) Hardware-based using the /WP pin to lock status register writes; and (3) Individual sector/block locking via 36h/39h instructions. The WPS bit in Status Register-3 selects between schemes - WPS=0 enables BP/TB/CMP protection, while WPS=1 activates individual lock bits. All methods are confirmed for W25Q16JWSNAQ in Sections 6.5 and 7.1 of the official datasheet.
What is the significance of the Quad Enable (QE) bit in Status Register-2 for W25Q16JWSNAQ?
The Quad Enable (QE) bit in Status Register-2 is non-volatile and controls physical pin reassignment on W25Q16JWSNAQ: when QE=0, pins function as /WP and /HOLD; when QE=1, they become IO2 and IO3 for Quad SPI operation. This bit must be set via Write Status Register-2 (31h) after issuing Write Enable (06h). QE configuration is mandatory before executing Quad I/O instructions like EBh, and its state persists across power cycles - a confirmed requirement for W25Q16JWSNAQ per Section 4.2 and Table 7-1.
Can W25Q16JWSNAQ be used for Execute-in-Place (XIP) applications, and what performance can be expected?
Yes, W25Q16JWSNAQ supports XIP via Dual and Quad SPI interfaces. Using Fast Read Quad I/O (EBh) at 133MHz, it achieves up to 66MB/s continuous read throughput - sufficient for real-time execution of ARM Cortex-M4/M7 firmware without local RAM shadowing. The 4KB uniform sector size enables precise mapping of executable sections, and erase/program suspend (75h/7Ah) ensures deterministic interrupt response during background operations - all validated for W25Q16JWSNAQ in Sections 6.2, 6.3, and 6.5.
W25Q16JWSNAQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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, DTR
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 3ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q16JWSNAQ FAQ
1.How can I place an order for W25Q16JWSNAQ through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q16JWSNAQ 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 W25Q16JWSNAQ reliable?
The price and inventory of W25Q16JWSNAQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q16JWSNAQ is usually 5 days.
3.What payment methods are accepted for W25Q16JWSNAQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q16JWSNAQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q16JWSNAQ?
W25Q16JWSNAQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q16JWSNAQ 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 W25Q16JWSNAQ?
For technical support, including W25Q16JWSNAQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q16JWSNAQ requirements.
6.How does Aetrix verify that W25Q16JWSNAQ is sourced from the original manufacturer or authorized distributors?
All W25Q16JWSNAQ 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 W25Q16JWSNAQ meets industry standards.
7.What is the process for return or replacement of W25Q16JWSNAQ?
All W25Q16JWSNAQ units undergo pre-shipment inspection (PSI). If there is an issue with W25Q16JWSNAQ, 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 W25Q16JWSNAQ part is unused and in its original packaging.
Return procedure for W25Q16JWSNAQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q16JWSNAQ Tags
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