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Winbond Electronics Corporation W25Q16CLSSIG
- Part No.:
- W25Q16CLSSIG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q16CLSSIG.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,020
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Product details
Overview
W25Q16CLSSIG from Winbond is a 16 M-bit (2 MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with 50 MHz clock rate, 4 KB uniform sector erase granularity, and XIP-capable continuous read mode - used for code storage, firmware boot, and parameter retention in microcontroller-based embedded systems.
For engineers reviewing the W25Q16CLSSIG datasheet, W25Q16CLSSIG pinout, W25Q16CLSSIG application, or W25Q16CLSSIG equivalent, key selection criteria include quad I/O enable (QE bit), hardware write protection via /WP and /HOLD pins, JEDEC ID and SFDP register support, 2.3–3.6 V supply range, and -40°C to +85°C industrial temperature operation.
Technical Context
The W25Q16CLSSIG implements a SPI command-set architecture with three operational modes: Standard (4-pin: /CS, CLK, DI, DO), Dual (6-pin: /CS, CLK, IO0, IO1, /WP, /HOLD), and Quad (8-pin: /CS, CLK, IO0–IO3). Quad mode requires non-volatile QE bit (Status Register-2, bit 1) to be set, repurposing /WP and /HOLD as IO2 and IO3.
It features dual status registers (SR-1 and SR-2), 64-bit unique ID, SFDP register for discoverable parameters, three 256-byte security registers with OTP lock capability, and erase/program suspend/resume functionality - enabling robust firmware update sequencing and secure configuration storage in resource-constrained designs.
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 (6-wire), Quad SPI (8-wire); QE bit required for Quad I/O |
| Max Clock Frequency | 50 MHz (Standard/Dual/Quad); enables 100 MHz equiv. Dual and 200 MHz equiv. Quad transfer rates |
| Erase Granularity | Uniform 4 KB sectors (512 total), 32 KB blocks (64 total), 64 KB blocks (32 total), full-chip erase |
| Write Endurance | 100,000 program/erase cycles per sector, 20-year data retention at +25°C |
| Supply Voltage | 2.3 V to 3.6 V; active current ≤ 4 mA (50 MHz), power-down current ≤ 1 µA (typ.) |
| Operating Temp | -40°C to +85°C, qualified for industrial applications |
Pinout & Package
W25Q16CLSSIG is packaged in an 8-pin SOIC 208-mil (package code SS), with gull-wing leads and standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select | Active-low enable; places device in standby when high; must track VCC during power-up/down |
| DO (IO1) | Serial Data Output / Quad I/O Line 1 | Unidirectional output in Standard SPI; bidirectional I/O in Dual/Quad modes |
| /WP (IO2) | Write Protect Input / Quad I/O Line 2 | Hardware lock for Status Register when QE=0; becomes IO2 in Quad mode (QE=1) |
| GND | Ground Reference | Primary return path for VCC and I/O signals; decoupling capacitor required near pin |
| VCC | Power Supply | 2.3–3.6 V single supply; internal charge pumps generate programming voltages |
| /HOLD (IO3) | Hold Control / Quad I/O Line 3 | Pauses ongoing SPI transaction when low (Standard/Dual only); becomes IO3 in Quad mode |
| CLK | Serial Clock Input | Edge-triggered timing source; supports SPI Mode 0 and Mode 3; max 50 MHz |
| DI (IO0) | Serial Data Input / Quad I/O Line 0 | Unidirectional input in Standard SPI; bidirectional I/O in Dual/Quad modes |
Key Features
| Feature | Design Value |
|---|---|
| Continuous Read Mode | Enables true XIP execution with ≤8-clock instruction overhead and configurable 8/16/32/64-byte wrap |
| Dual/Quad SPI Throughput | Delivers up to 25 MB/s continuous read rate - 4× faster than legacy serial flash |
| Flexible Erase Architecture | Supports sector (4 KB), block (32/64 KB), and chip-level erases - ideal for OTA firmware updates |
| Security Registers | Three 256-byte OTP-lockable security registers for keys, calibration data, or device-specific credentials |
| JEDEC & SFDP Compliance | Provides standardized manufacturer/device ID (9Fh), 64-bit unique serial number (4Bh), and SFDP register (5Ah) for auto-configuration |
Applications
| Boot Code Storage | Firmware Update Storage |
|---|---|
Use Scenario: Storing bootloader and primary application firmware executed directly from flash on MCU startup. IC Role / Device Role / Timing Role: Non-volatile code memory with XIP-capable Quad SPI interface enabling zero-copy execution without RAM loading. Use Value: Reduces BOM cost and boot latency by eliminating external parallel flash or RAM copy steps; leverages 50 MHz Quad I/O for >20 MB/s effective read bandwidth. | Use Scenario: Holding field-upgradable firmware images and delta patches in industrial gateways and IoT edge nodes. IC Role / Device Role / Timing Role: Field-programmable storage partitioned into dual banks (active/inactive) with atomic sector swap capability. Use Value: Enables safe over-the-air updates using 4 KB sector granularity and erase/program suspend/resume - preserving runtime state during flash reprogramming. |
| Configuration & Calibration Data | Secure Credential Storage |
Use Scenario: Retaining device-specific calibration coefficients, network settings, and user preferences across power cycles. IC Role / Device Role / Timing Role: Parameter memory with hardware write protection (/WP pin) and software-controlled BP bits to prevent accidental overwrite. Use Value: Ensures data integrity using top/bottom array protection, volatile/non-volatile status register control, and <1 µA power-down current for battery-backed retention. | Use Scenario: Storing cryptographic keys, device identity tokens, and secure boot manifests in medical and automotive ECUs. IC Role / Device Role / Timing Role: Secure non-volatile storage with three OTP-lockable 256-byte security registers and 64-bit unique ID per unit. Use Value: Provides tamper-resistant credential isolation independent of main array; prevents replay attacks via per-device uniqueness and one-time programmability. |
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 |
|---|---|---|---|
| MX25L1606EML-12G | Same density (16 M-bit), 3.3 V, SOIC-8; supports Standard/Dual SPI only - no Quad I/O or QE bit | Lacks XIP-optimized continuous read mode and Quad throughput; lower max clock (86 MHz but no Quad acceleration) | Select when Quad interface and >10 MB/s read performance are unnecessary and legacy SPI compatibility is prioritized. |
| S25FL116K0XMFI011 | 16 M-bit, 2.7–3.6 V, SOIC-8; supports Quad SPI and SFDP, but uses different status register layout and command set (e.g., no /HOLD pin function) | Requires driver adaptation due to Cypress-specific lock bits and erase suspend behavior; no hardware /HOLD pin | Choose when migrating from Cypress ecosystem or requiring integrated ECC - verify command mapping and timing margins before substitution. |
Compared with MX25L1606EML-12G and S25FL116K0XMFI011, the W25Q16CLSSIG delivers superior XIP readiness via continuous read mode, deterministic Quad I/O pin mapping with /WP and /HOLD reuse, and unified JEDEC/SFDP identification - making it optimal for new designs demanding high-speed firmware access and secure parameter storage.
Availability
W25Q16CLSSIG is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and IoT edge devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for W25Q16CLSSIG 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 DRAM, mobile DRAM, and serial flash memory solutions for embedded and consumer applications.
The W25Q series is designed for high-performance, space-constrained embedded systems requiring fast code execution, flexible erase architecture, and robust security features - targeting MCU boot, firmware storage, and secure configuration use cases.
FAQ
What is the pin configuration and package type of the W25Q16CLSSIG?
The W25Q16CLSSIG uses an 8-pin SOIC 208-mil package (package code SS) with standard gull-wing leads. Pinout is /CS, DO (IO1), /WP (IO2), GND, VCC, /HOLD (IO3), CLK, and DI (IO0). This matches the mechanical and thermal specifications defined in Winbond's datasheet revision G, section 8.2.
Does the W25Q16CLSSIG support Quad SPI operation, and how is it enabled?
Yes, the W25Q16CLSSIG supports Quad SPI via instructions like Fast Read Quad I/O (EBh) and Word Read Quad I/O (E7h). Quad mode is enabled by setting the non-volatile Quad Enable (QE) bit in Status Register-2 (bit 1) using the Write Status Register instruction (01h). Once set, /WP and /HOLD become IO2 and IO3.
What erase and program endurance does the W25Q16CLSSIG guarantee?
The W25Q16CLSSIG guarantees a minimum of 100,000 program/erase cycles per sector and 20 years of data retention at +25°C. These values are specified in the Electrical Characteristics section (7.4) of the official datasheet and apply uniformly across all 512 sectors of the 16 M-bit array.
How does hardware write protection work on the W25Q16CLSSIG?
Hardware write protection on the W25Q16CLSSIG is implemented via the /WP pin, which - when held low - prevents writes to the Status Register when QE = 0. It works in conjunction with Block Protect (BP2–BP0), Top/Bottom (TB), and Status Register Protect (SRP1/SRP0) bits to lock sectors or the entire array. The /WP pin is inactive in Quad mode (QE = 1).
Is the W25Q16CLSSIG compatible with JEDEC-standard identification and SFDP?
Yes, the W25Q16CLSSIG fully supports JEDEC-standard identification: Read JEDEC ID (9Fh) returns 0xEF4015, and Read Manufacturer/Device ID (90h) returns 0xEF14. It also implements the SFDP register (5Ah) with version 1.5 compliance, enabling automatic configuration of timing and feature parameters by host controllers.
W25Q16CLSSIG 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:
- 50 MHz
- Write Cycle Time - Word, Page:
- 50µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q16CLSSIG FAQ
1.How can I place an order for W25Q16CLSSIG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q16CLSSIG 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 W25Q16CLSSIG reliable?
The price and inventory of W25Q16CLSSIG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q16CLSSIG is usually 5 days.
3.What payment methods are accepted for W25Q16CLSSIG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q16CLSSIG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q16CLSSIG?
W25Q16CLSSIG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q16CLSSIG 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 W25Q16CLSSIG?
For technical support, including W25Q16CLSSIG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q16CLSSIG requirements.
6.How does Aetrix verify that W25Q16CLSSIG is sourced from the original manufacturer or authorized distributors?
All W25Q16CLSSIG 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 W25Q16CLSSIG meets industry standards.
7.What is the process for return or replacement of W25Q16CLSSIG?
All W25Q16CLSSIG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q16CLSSIG, 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 W25Q16CLSSIG part is unused and in its original packaging.
Return procedure for W25Q16CLSSIG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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