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Winbond Electronics Corporation W25Q64FWSSIQ
- Part No.:
- W25Q64FWSSIQ
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q64FWSSIQ.pdf
- Description:
- IC FLASH 64MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,874
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Product details
Overview
W25Q64FWSSIQ from Winbond is a 1.8V, 64M-bit (8MB) serial NOR flash memory supporting Standard/Dual/Quad SPI and QPI interfaces. It delivers up to 104MHz clock rate (416MHz equivalent Quad I/O), 4KB uniform sector erase, 256-byte page programming, and true execute-in-place (XIP) capability for embedded code storage and boot code execution in space-constrained microcontroller systems.
For engineers reviewing the W25Q64FWSSIQ datasheet, W25Q64FWSSIQ pinout, W25Q64FWSSIQ application, or W25Q64FWSSIQ equivalent, key selection criteria include 1.65–1.95V supply compatibility, JEDEC-compliant device ID and SFDP register support, hardware write protection via /WP and /HOLD pins, 100,000 program/erase cycles, and -40°C to +85°C industrial temperature operation.
Technical Context
The W25Q64FWSSIQ implements a flexible SPI command architecture with mode-selectable operation: Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3, enabled by QE bit in Status Register-2), and QPI (2-clock instruction entry). Its internal block diagram integrates a 32,768 × 256-byte page array, 4KB-sector/32KB-block/64KB-block erase hierarchy, and three 256-byte one-time-programmable (OTP) security registers.
Functional behavior is governed by volatile and non-volatile status register bits-including BP0–BP2, TB, SEC, CMP, SRP0/SRP1, and QE-which control memory protection granularity, output driver strength (DRV0/DRV1), and /HOLD vs. /RESET pin function mapping. Erase/program suspend/resume and continuous read with wrap (8/16/32/64-byte) enable deterministic real-time system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 M-bit (8 MB) organized as 32,768 pages × 256 bytes; enables full firmware image storage for mid-tier MCUs. |
| Supply Voltage | 1.65 V to 1.95 V; compatible with modern low-voltage SoCs and battery-powered IoT nodes without level-shifting. |
| Max Clock Frequency | 104 MHz SPI; supports 208 MHz (Dual I/O) and 416 MHz (Quad I/O) effective throughput for XIP latency < 10 µs. |
| Erase Granularity | Uniform 4 KB sectors (4,096 total), 32 KB blocks (2,048), 64 KB blocks (1,024); allows fine-grained parameter/data partitioning. |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention at +85°C; validated for automotive infotainment and industrial logging. |
| Security Features | 64-bit unique ID, JEDEC SFDP register, three 256-byte OTP security registers, and configurable top/bottom/complement protection. |
| Operating Temperature | -40°C to +85°C; qualified for industrial control, networking equipment, and edge AI accelerators. |
Pinout & Package
W25Q64FWSSIQ uses an 8-pin SOIC 208-mil package (Package Code SS), with lead-free, RoHS-compliant construction and standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; must transition high→low after power-up before first instruction; controls DO high-impedance state. |
| 2 DO (IO1) | Data Output / Bidirectional I/O1 | Unidirectional output in Standard SPI; bidirectional in Dual/Quad SPI/QPI; used for status/data reads on falling CLK edge. |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O2 | Hardware lock for status register when QE=0; becomes IO2 in Quad SPI/QPI; active-low, requires external pull-up. |
| 4 GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection to minimize noise coupling. |
| 5 DI (IO0) | Data Input / Bidirectional I/O0 | Unidirectional input in Standard SPI; bidirectional in Dual/Quad SPI/QPI; accepts instructions/addresses on rising CLK edge. |
| 6 CLK | Serial Clock Input | Master-generated timing signal; supports SPI modes 0 and 3; determines maximum interface speed and setup/hold margins. |
| 7 /HOLD or /RESET (IO3) | Hold/Reset Input / Bidirectional I/O3 | Pauses ongoing transfers when low (QE=0); functions as /RESET if configured via status register; becomes IO3 in Quad SPI/QPI. |
| 8 VCC | Power Supply | 1.65–1.95 V core supply; decoupling capacitor (≥100 nF) required within 5 mm of pin for stable read/write timing. |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead to 2 clocks per command vs. 8 in SPI, enabling faster XIP startup and lower CPU load during firmware fetch. |
| Continuous Read Mode | Supports 8/16/32/64-byte wrap with only 8 clocks to address memory-critical for deterministic real-time code execution from flash. |
| Erase/Program Suspend & Resume | Allows background operations to pause for high-priority interrupts, then resume without data loss-essential for RTOS-based systems. |
| Volatile & Non-Volatile Status Control | Enables runtime reconfiguration of protection (e.g., BP bits) while preserving critical settings across power cycles via non-volatile latch. |
| Three 256-Byte Security Registers | Provide dedicated, OTP-lockable storage for keys, calibration data, or secure boot manifests-separate from main array and inaccessible via standard commands. |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters for programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary non-volatile code storage with execute-in-place (XIP) support for deterministic boot and runtime code execution. Use Value: 4KB sector erase enables independent update of firmware modules without disrupting operational logic; -40°C to +85°C rating ensures reliability in uncontrolled enclosures. |
Use Scenario: Hosting boot code and safety-critical sensor fusion algorithms for camera/radar processing units in advanced driver assistance systems. IC Role / Device Role / Timing Role: High-speed Quad SPI/XIP-capable boot memory interfaced directly to ARM Cortex-R5/R7 cores. Use Value: 416MHz equivalent Quad I/O bandwidth reduces boot time by >60% vs. legacy SPI flash; 100K-cycle endurance supports over-the-air (OTA) update cycles. |
| IoT Edge Gateway Configuration | Medical Diagnostic Device Data Log |
|
Use Scenario: Storing encrypted network credentials, TLS certificates, and device-specific provisioning data in cellular/Wi-Fi gateways deployed remotely. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection and unique 64-bit ID for device identity binding. Use Value: Three OTP security registers isolate sensitive keys from main array; /WP pin + BP bits prevent accidental overwrite during field firmware updates. |
Use Scenario: Capturing time-stamped physiological measurements (ECG, SpO₂) in portable diagnostic tools requiring long-term data integrity. IC Role / Device Role / Timing Role: Reliable, low-power non-volatile data logger with sector-level wear leveling and 20-year retention guarantee. Use Value: Uniform 4KB sectors allow precise allocation for timestamped log buffers; <1 µA power-down current extends battery life in standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L6433FZNI-10G | Same density (64Mb), 1.8V, but max SPI clock 133MHz; lacks QPI mode and SFDP register; no OTP security registers. | Suitable for cost-sensitive consumer devices where XIP performance and security are secondary. | Choose when QPI, security registers, or JEDEC SFDP auto-configuration are not required. |
| S25FL164K0XMFI010 | 64Mb, 1.8V, supports HyperBus interface (not SPI/QPI); higher pin count (16-pin SOIC); different command set and timing. | Targeted at high-bandwidth applications using Cypress/Infineon-compatible controllers with HyperFlash support. | Select only if host MCU has native HyperBus controller and board layout accommodates 16-pin package. |
Compared with MX25L6433FZNI-10G and S25FL164K0XMFI010, the W25Q64FWSSIQ uniquely combines QPI mode, SFDP register, three OTP security registers, and 4KB uniform sector architecture in an industry-standard 8-pin SOIC package-making it optimal for secure, XIP-capable industrial and automotive designs requiring field-upgradable firmware.
Availability
W25Q64FWSSIQ is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, and medical diagnostic devices requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for W25Q64FWSSIQ 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 DRAM, mobile DRAM, and serial flash memory solutions for embedded, communications, and consumer markets.
The W25Q series was designed specifically for high-reliability, low-voltage embedded systems requiring fast XIP, robust security, and industrial temperature operation-targeting MCU boot, firmware storage, and parameter logging applications.
FAQ
What is the operating voltage range for W25Q64FWSSIQ?
The W25Q64FWSSIQ operates from 1.65 V to 1.95 V. This narrow 1.8V nominal range ensures compatibility with modern ultra-low-power microcontrollers and SoCs, eliminates need for external voltage translation, and maintains stable timing margins across process and temperature variations. Operation outside this range may cause undefined behavior or permanent damage to the W25Q64FWSSIQ.
Does W25Q64FWSSIQ support execute-in-place (XIP) functionality?
Yes, the W25Q64FWSSIQ supports true XIP via Fast Read Dual/Quad I/O and QPI instructions. Its Continuous Read Mode requires only 8 clocks to address memory and enables seamless instruction fetch directly from flash without RAM buffering. This capability is validated across all supported interfaces and is widely used in Cortex-M and RISC-V based designs relying on the W25Q64FWSSIQ for boot and runtime code execution.
How many program/erase cycles does W25Q64FWSSIQ guarantee?
The W25Q64FWSSIQ guarantees a minimum of 100,000 program/erase cycles per sector. This endurance rating is specified under standard industrial conditions (25°C, VCC = 1.8V ±0.15V) and applies uniformly across all 4KB sectors. Field data confirms consistent performance beyond 120,000 cycles in typical embedded applications using the W25Q64FWSSIQ.
What package type is used by W25Q64FWSSIQ?
W25Q64FWSSIQ uses an 8-pin SOIC 208-mil package (Package Code SS), with gull-wing leads, Pb-free finish, and RoHS compliance. This standard footprint ensures drop-in compatibility with existing PCB layouts designed for legacy SPI flash devices and simplifies rework and inspection in high-volume manufacturing environments using the W25Q64FWSSIQ.
Can W25Q64FWSSIQ be used with both SPI and QPI interfaces on the same design?
Yes-the W25Q64FWSSIQ supports both SPI and QPI modes, but they are mutually exclusive: "Enter QPI (38h)" switches from SPI to QPI, and "Exit QPI (FFh)" returns to SPI. The QE bit in Status Register-2 must be set non-volatily to enable QPI. Host firmware must initialize the correct mode at boot; mixing modes without explicit transition corrupts communication with the W25Q64FWSSIQ.
W25Q64FWSSIQ 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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 64Mbit
- Memory Organization:
- 8M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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
W25Q64FWSSIQ FAQ
1.How can I place an order for W25Q64FWSSIQ through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q64FWSSIQ 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 W25Q64FWSSIQ reliable?
The price and inventory of W25Q64FWSSIQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q64FWSSIQ is usually 5 days.
3.What payment methods are accepted for W25Q64FWSSIQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q64FWSSIQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q64FWSSIQ?
W25Q64FWSSIQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q64FWSSIQ 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 W25Q64FWSSIQ?
For technical support, including W25Q64FWSSIQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q64FWSSIQ requirements.
6.How does Aetrix verify that W25Q64FWSSIQ is sourced from the original manufacturer or authorized distributors?
All W25Q64FWSSIQ 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 W25Q64FWSSIQ meets industry standards.
7.What is the process for return or replacement of W25Q64FWSSIQ?
All W25Q64FWSSIQ units undergo pre-shipment inspection (PSI). If there is an issue with W25Q64FWSSIQ, 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 W25Q64FWSSIQ part is unused and in its original packaging.
Return procedure for W25Q64FWSSIQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q64FWSSIQ Tags
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