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Winbond Electronics Corporation W25Q64FWSSIF
- Part No.:
- W25Q64FWSSIF
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q64FWSSIF.pdf
- Description:
- IC FLASH 64MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
W25Q64FWSSIF from Winbond is a 1.8V, 64M-bit (8MB) serial NOR flash memory with Dual/Quad SPI and QPI interfaces, organized as 32,768 × 256-byte pages. It supports 104MHz SPI clock, 416MHz equivalent Quad I/O transfer rate, 4KB uniform sector erase, and hardware write protection via /WP and /HOLD pins. Used for code shadowing, XIP execution, and firmware storage in space-constrained embedded systems.
For engineers reviewing the W25Q64FWSSIF datasheet, W25Q64FWSSIF pinout, W25Q64FWSSIF application, or W25Q64FWSSIF equivalent, key selection criteria include 1.65–1.95V supply compatibility, JEDEC ID (EF4017), 64-bit unique serial number, SFDP register support, and configurable /HOLD or /RESET functionality on Pin 7 of SOIC-8 package.
Technical Context
The W25Q64FWSSIF implements a quad-peripheral interface (QPI) mode requiring non-volatile QE bit (Status Register-2, Bit 1) to be set; in QPI mode, all four IO lines (IO0–IO3) carry instruction/address/data in 2-clock cycles. Standard/Dual/Quad SPI modes share identical pin mapping but differ in active IO count and instruction encoding.
It features volatile/non-volatile status register bits including BP2–BP0, TB, SEC, CMP, SRP0/SRP1, and DRV0/DRV1 for output driver strength control. Erase/program suspend/resume capability enables concurrent background operations without halting host communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 M-bit (8 MB), organized as 32,768 × 256-byte pages |
| Supply Voltage | 1.65 V to 1.95 V - enables direct integration into 1.8V logic domains without level shifting |
| Max Clock Frequency | 104 MHz SPI - delivers up to 50 MB/s continuous read throughput in Quad I/O mode |
| Erase Granularity | 4 KB sectors (4,096 total), 32 KB blocks (2,048), 64 KB blocks (1,024) - supports fine-grained firmware partitioning |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention at +85°C - suitable for field-updatable firmware |
| Security Features | Three 256-byte OTP-lockable security registers; 64-bit unique ID; SFDP v1.6 compliant - enables secure boot and device authentication |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
W25Q64FWSSIF uses an 8-pin SOIC-208-mil (Package Code SS) with exposed pad not present. Pin functions are electrically identical across SOIC, VSOP, WSON, XSON, and WLCSP variants per datasheet Section 3.3 and 3.5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable; high-impedance DO during deselect; must transition high→low after power-up before first instruction |
| 2 DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional IO1 in Dual/Quad/QPI modes; shares function with IO1 per JEDEC JESD216 |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware lock for status register when QE=0; becomes IO2 in Quad/QPI modes; requires external pull-up when unused |
| 4 GND | Ground Reference | Primary return path for VCC and I/O; decoupling capacitor required within 10 mm of pin |
| 5 DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional IO0 in Dual/Quad/QPI; carries instruction/address/data on rising CLK edge |
| 6 CLK | Serial Clock Input | Edge-triggered timing reference; supports SPI Modes 0 and 3; max 104 MHz frequency defines system bandwidth ceiling |
| 7 /HOLD or /RESET (IO3) | Hold/Reset Input / Bidirectional I/O | Selectable function via Status Register; active-low hold pauses ongoing transfers; /RESET performs hardware reset when enabled and QE=0 |
| 8 VCC | Power Supply | 1.65–1.95 V supply; bypassed with 100 nF ceramic capacitor; ripple must stay within ±50 mV for reliable operation |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead to 2 clocks vs. 8 in SPI mode, enabling deterministic XIP latency critical for real-time boot |
| Erase/Program Suspend & Resume | Allows host to pause background erase/program and service urgent reads/writes - essential for multitasked firmware updates |
| Configurable /HOLD or /RESET | Single pin serves dual purpose; selected via Status Register bit HOLD/RST - saves PCB routing and MCU GPIO in pin-limited designs |
| JEDEC SFDP v1.6 Support | Enables automatic parameter discovery by host bootloader without hard-coded timing tables - simplifies porting across flash vendors |
| Individual Sector Lock | Per-sector (4KB) lock/unlock via 36h/39h instructions - isolates bootloader, config, and application partitions against corruption |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
Use Scenario: Storing and executing boot firmware and safety-critical control algorithms in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary non-volatile code storage with XIP capability; provides deterministic 104MHz SPI access to reduce boot time under -40°C to +85°C thermal cycling. Use Value: 20-year data retention and 100K endurance ensure firmware integrity over 15+ year product lifecycle without field replacement. | Use Scenario: Hosting boot image and sensor calibration data for radar/EPS ECUs where ASIL-B compliance requires verified memory reliability. IC Role / Device Role / Timing Role: Secure boot source with 64-bit unique ID and OTP-locked security registers; supports encrypted read via host-managed key binding. Use Value: JEDEC SFDP enables auto-negotiated timing parameters, eliminating manual timing tuning during ECU software validation. |
| IoT Edge Gateway Configuration | Medical Infusion Pump UI Storage |
Use Scenario: Storing network credentials, OTA update packages, and device-specific configuration profiles in battery-powered cellular gateways. IC Role / Device Role / Timing Role: Parameter and data log storage with hardware write protection (/WP pin); leverages 4KB sector erase for atomic config updates. Use Value: 1 µA typical power-down current extends battery life between firmware updates; low-voltage operation avoids extra DC-DC stages. | Use Scenario: Holding GUI assets, calibration curves, and audit logs in Class II medical devices requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure asset repository with three OTP-lockable 256-byte security registers for cryptographic keys and regulatory metadata. Use Value: Individual sector lock (36h/39h) prevents accidental overwrite of FDA-mandated calibration data during routine UI updates. |
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 |
|---|---|---|---|
| MX25L6433FZNI-10G | 3.3V supply only; no QPI mode; supports DTR (Double Transfer Rate) read but lacks /HOLD or /RESET pin multiplexing | Requires level-shifting for 1.8V SoCs; no suspend/resume; limited security register depth (128B) | Choose when existing 3.3V design prohibits voltage rail change and QPI/XIP is unnecessary |
| S25FL164K0XMFI010 | 1.8V compatible; includes HyperBus interface option; supports 133MHz DDR read but lacks SFDP v1.6 and OTP security registers | Higher bandwidth for graphics buffers; no built-in unique ID or OTP locks for secure boot | Prefer for high-throughput display frame buffer use; avoid when cryptographic key storage or device identity is required |
Compared with MX25L6433FZNI-10G and S25FL164K0XMFI010, the W25Q64FWSSIF uniquely combines 1.8V operation, QPI mode, SFDP v1.6, 64-bit UID, and OTP-secured registers - making it optimal for secure, low-power, XIP-capable embedded firmware where pin count and voltage compatibility constrain alternatives.
Availability
W25Q64FWSSIF is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, IoT gateways, medical infusion pumps, and consumer smart home hubs requiring stable component supply across multi-year production cycles.
Supply support for W25Q64FWSSIF 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 since 1987.
The W25Q series targets embedded systems needing high-speed, low-voltage, secure serial NOR flash for code execution and firmware storage - emphasizing XIP readiness, industrial temperature range, and standardized command sets.
FAQ
What is the exact package type and footprint for W25Q64FWSSIF?
W25Q64FWSSIF uses an 8-pin SOIC-208-mil package (Package Code SS) with 208-mil body width and standard 0.050-inch lead pitch. The footprint matches JEDEC MS-012AC, requiring 1.27 mm pitch pads, 1.5 mm pad length, and 0.5 mm solder mask opening per pin. No thermal pad is present.
Does W25Q64FWSSIF support execute-in-place (XIP) operation, and what conditions are required?
Yes, W25Q64FWSSIF supports true XIP via Continuous Read Mode and Quad I/O instructions. Required conditions: QE bit (Status Register-2, Bit 1) must be set for Quad mode; host controller must support 4-line I/O and issue Fast Read Quad I/O (EBh) or Word Read Quad I/O (E7h); clock stability < ±1% at 104 MHz is mandatory for reliable address latching.
How is the /HOLD pin function configured on W25Q64FWSSIF, and can it be used simultaneously with /RESET?
The /HOLD or /RESET function on Pin 7 of W25Q64FWSSIF is selected via the HOLD/RST bit (Status Register-2, Bit 7). When HOLD/RST = 0, Pin 7 operates as /HOLD; when = 1, it functions as /RESET. These modes are mutually exclusive - simultaneous use is not supported, and the pin cannot serve both roles in a single configuration.
What JEDEC-standard identifiers does W25Q64FWSSIF report, and how are they accessed?
W25Q64FWSSIF reports Manufacturer ID EFh (Winbond), Device ID 4017h (64M-bit density), and a unique 64-bit serial number. These are accessed via Read JEDEC ID (9Fh), Read Manufacturer/Device ID (90h), and Read Unique ID Number (4Bh) instructions respectively - all compliant with JESD216B and JEP106AF standards.
Is W25Q64FWSSIF compatible with legacy SPI controllers that do not support Quad or QPI modes?
Yes, W25Q64FWSSIF is fully backward-compatible with standard SPI controllers. It defaults to Standard SPI mode (Mode 0 or 3) at power-up. Dual/Quad/QPI modes require explicit enablement via Write Status Register (01h/31h/11h) and Enter QPI (38h) instructions - no changes to controller hardware or pinout are needed for basic SPI operation.
W25Q64FWSSIF 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:
- 64Mbit
- Memory Organization:
- 8M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 60µs, 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
W25Q64FWSSIF FAQ
1.How can I place an order for W25Q64FWSSIF through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q64FWSSIF 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 W25Q64FWSSIF reliable?
The price and inventory of W25Q64FWSSIF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q64FWSSIF is usually 5 days.
3.What payment methods are accepted for W25Q64FWSSIF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q64FWSSIF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q64FWSSIF?
W25Q64FWSSIF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q64FWSSIF 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 W25Q64FWSSIF?
For technical support, including W25Q64FWSSIF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q64FWSSIF requirements.
6.How does Aetrix verify that W25Q64FWSSIF is sourced from the original manufacturer or authorized distributors?
All W25Q64FWSSIF 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 W25Q64FWSSIF meets industry standards.
7.What is the process for return or replacement of W25Q64FWSSIF?
All W25Q64FWSSIF units undergo pre-shipment inspection (PSI). If there is an issue with W25Q64FWSSIF, 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 W25Q64FWSSIF part is unused and in its original packaging.
Return procedure for W25Q64FWSSIF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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