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Winbond Electronics Corporation W25Q64CVSSJG
- Part No.:
- W25Q64CVSSJG
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
W25Q64CVSSJG.pdf
- Description:
- IC FLASH 64MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,870
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Product details
Overview
W25Q64CVSSJG from Winbond is a 64M-bit (8MB) serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces with up to 80 MHz clock frequency, 4KB uniform sector architecture, and true execute-in-place (XIP) capability for embedded code storage. It operates from 2.7V–3.6V, draws 4mA active current and <1µA in power-down mode, and is commonly used in microcontroller boot code storage and firmware update storage.
For engineers reviewing the W25Q64CVSSJG datasheet, W25Q64CVSSJG pinout, W25Q64CVSSJG application, or W25Q64CVSSJG equivalent, key selection considerations include Quad SPI enable (QE bit), 4KB sector granularity for parameter storage, hardware write protection via /WP and /HOLD pins, and compatibility with JEDEC-standard SFDP and Unique ID registers.
Technical Context
The W25Q64CVSSJG implements a SPI command set compliant with Mode 0 and Mode 3 clock polarity, supports dual/quad I/O via configurable IO0–IO3 pins, and requires non-volatile Quad Enable (QE) bit setting in Status Register-2 to activate Quad SPI functionality. Its internal architecture includes a 256-byte page buffer, 2,048 erasable 4KB sectors, and 128 erasable 64KB blocks.
It features programmable block protection (BP2–BP0, TB, SEC, CMP), volatile/non-volatile status register bits, Erase/Program Suspend & Resume, and three 256-byte security registers with OTP locks. The device supports Fast Read Quad I/O (EBh) at up to 320MHz equivalent data rate and Continuous Read Mode with as few as 8 clocks overhead per 24-bit address access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 M-bit (8 MB), organized as 32,768 × 256-byte pages |
| Interface Support | Standard SPI (DI/DO), Dual SPI (IO0/IO1), Quad SPI (IO0–IO3) with QE bit enabled |
| Max Clock Frequency | 80 MHz; enables 160 MHz (Dual I/O) or 320 MHz (Quad I/O) effective throughput |
| Erase Granularity | Uniform 4KB sectors, 32KB blocks, 64KB blocks, or full chip - enabling fine-grained firmware partitioning |
| Write Endurance | 100,000 program/erase cycles per sector (industrial temp range) |
| Data Retention | 20 years at +85°C; ensures long-term reliability in unattended embedded systems |
| Operating Voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic domains without level shifting |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade operation |
Pinout & Package
W25Q64CVSSJG uses an 8-pin SOIC 208-mil package (package code SS), with lead-free RoHS-compliant finish and standard JEDEC outline MS-012AA.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 /CS | Chip Select Input | Active-low enable signal; places DO/IO pins in high-impedance state when deasserted |
| 2 DO (IO1) | Data Output / Bidirectional I/O1 | Unidirectional output in Standard SPI; bidirectional in Dual/Quad SPI for read/write data path |
| 3 /WP (IO2) | Write Protect Input / Bidirectional I/O2 | Hardware lock for status register; repurposed as IO2 when QE=1 (Quad SPI active) |
| 4 GND | Ground Reference | Primary return path for all digital and analog circuitry; must be low-impedance |
| 5 DI (IO0) | Data Input / Bidirectional I/O0 | Unidirectional input in Standard SPI; bidirectional in Dual/Quad SPI for instruction/address/data |
| 6 CLK | Serial Clock Input | Synchronizes all SPI transfers; supports Mode 0 and Mode 3 clock polarity |
| 7 /HOLD (IO3) | Hold Input / Bidirectional I/O3 | Pauses ongoing SPI transaction; repurposed as IO3 when QE=1 (Quad SPI active) |
| 8 VCC | Power Supply | Single 2.7–3.6 V supply; powers core logic, charge pumps, and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPI Enable (QE bit) | Non-volatile Status Register-2 bit that unlocks IO2 (/WP) and IO3 (/HOLD) for quad data transfer - required before using EBh/E7h instructions |
| Continuous Read Mode | Reduces instruction overhead to ≤8 clocks per 24-bit address; enables efficient XIP execution without external cache |
| 4KB Uniform Sector Architecture | Allows independent erase of smallest 4KB unit - critical for storing configuration parameters alongside firmware |
| Security Registers | Three 256-byte OTP-lockable registers for secure key storage, calibration data, or device-specific credentials |
| SFDP Register Support | JEDEC JESD216-compliant Serial Flash Discoverable Parameters table - enables automatic driver configuration in modern bootloaders |
| Unique 64-bit Serial Number | Factory-programmed per-device ID - supports secure provisioning, anti-cloning, and field asset tracking |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Code |
|---|---|
Use Scenario: Storing and updating firmware images for programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Primary non-volatile code storage device; provides fast Quad SPI read access for cold-boot initialization and background OTA updates. Use Value: 20-year data retention and 100,000-cycle endurance ensure reliable operation over 10+ year product lifecycles without field replacement. |
Use Scenario: Hosting boot ROM and safety-critical startup routines for head-unit MCUs in automotive infotainment systems requiring AEC-Q200-aligned components. IC Role / Device Role / Timing Role: Boot memory mapped via XIP-capable SPI controller; delivers deterministic <100 µs latency for first instruction fetch after reset. Use Value: 4KB sector erase enables atomic firmware patching without disrupting running applications - meeting ASIL-B functional safety constraints. |
| Medical Device Configuration Storage | IoT Edge Gateway Secure Boot |
Use Scenario: Persisting calibrated sensor offsets, user preferences, and regulatory compliance logs in portable diagnostic equipment certified to IEC 62304. IC Role / Device Role / Timing Role: Parameter storage peripheral; accessed via Standard SPI during initialization and via Quad SPI during field updates. Use Value: Hardware /WP pin + BP bits provide tamper-resistant write protection - satisfying FDA design control requirements for data integrity. |
Use Scenario: Storing signed bootloader images and public key certificates for secure boot chain validation in cellular-connected edge gateways. IC Role / Device Role / Timing Role: Trusted root-of-trust memory; leverages OTP-locked security registers to store immutable cryptographic keys. Use Value: 64-bit unique ID and SFDP support enable zero-touch provisioning and automated certificate binding during manufacturing. |
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 | 64Mb, 104MHz max clock, supports DTR (Double Transfer Rate) mode; no built-in SFDP register | Lacks JEDEC SFDP auto-configuration; requires manual driver tuning for timing parameters | Preferred where higher clock speed justifies added software complexity and no SFDP dependency exists |
| S25FL164K0XMFI010 | 64Mb, 80MHz, includes on-die ECC and sector lockdown; supports 1.8V/3.3V dual voltage | Includes hardware ECC for NAND-like reliability; supports wider voltage range but larger footprint (16-pin SOIC) | Chosen when system-level error correction or mixed-voltage board design is required |
Compared with MX25L6433FZNI-10G and S25FL164K0XMFI010, W25Q64CVSSJG offers optimal balance of JEDEC SFDP compatibility, 4KB sector flexibility, and industrial temperature support - making it ideal for cost-sensitive, space-constrained embedded designs requiring robust firmware storage without ECC overhead.
Availability
W25Q64CVSSJG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot code, and medical device configuration storage requiring stable component supply across multi-year production programs.
Supply support for W25Q64CVSSJG 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 memory solutions including NOR/NAND flash, RAM, and mobile DRAM.
The W25Q series targets embedded systems requiring high-speed, reliable, and secure serial flash - designed specifically for code execution, firmware storage, and parameter retention in resource-constrained microcontroller platforms.
FAQ
What is the package type and pin count of the W25Q64CVSSJG?
The W25Q64CVSSJG uses an 8-pin SOIC 208-mil (package code SS) with standard JEDEC MS-012AA dimensions. It has eight terminals: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD (IO3), and VCC. This package is RoHS-compliant and optimized for surface-mount reflow assembly in high-volume industrial PCBs.
Does the W25Q64CVSSJG support Quad SPI by default?
No - the W25Q64CVSSJG requires explicit programming of the Quad Enable (QE) bit in Status Register-2 to activate Quad SPI mode. Until QE=1, pins /WP and /HOLD remain dedicated to hardware write protection and hold functions. Once set, those pins become IO2 and IO3 for full quad data transfer using instructions like EBh (Fast Read Quad I/O).
How many program/erase cycles does the W25Q64CVSSJG guarantee?
The W25Q64CVSSJG guarantees more than 100,000 program/erase cycles per 4KB sector under industrial temperature conditions (–40°C to +85°C). This endurance rating applies to individual sectors and is validated per JEDEC standards, ensuring long-term reliability for firmware update partitions and configuration storage in deployed equipment.
Can the W25Q64CVSSJG be used for execute-in-place (XIP) operation?
Yes - the W25Q64CVSSJG supports true XIP via its Continuous Read Mode and Fast Read Quad I/O (EBh) instruction, achieving up to 320MHz effective throughput. With as few as 8 clock cycles overhead per 24-bit address, it enables deterministic instruction fetch directly from flash without intermediate RAM loading - widely adopted in Cortex-M and RISC-V boot architectures.
What security features does the W25Q64CVSSJG provide beyond basic write protection?
Beyond /WP pin and status register BP bits, the W25Q64CVSSJG includes three 256-byte security registers with OTP lock bits, 64-bit unique serial number per device, SFDP register for standardized parameter discovery, and power supply lock-down protection. These features collectively support secure boot, device authentication, and tamper-resistant credential storage in regulated applications.
W25Q64CVSSJG 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
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 50µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
W25Q64CVSSJG FAQ
1.How can I place an order for W25Q64CVSSJG through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q64CVSSJG 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 W25Q64CVSSJG reliable?
The price and inventory of W25Q64CVSSJG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q64CVSSJG is usually 5 days.
3.What payment methods are accepted for W25Q64CVSSJG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q64CVSSJG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q64CVSSJG?
W25Q64CVSSJG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q64CVSSJG 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 W25Q64CVSSJG?
For technical support, including W25Q64CVSSJG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q64CVSSJG requirements.
6.How does Aetrix verify that W25Q64CVSSJG is sourced from the original manufacturer or authorized distributors?
All W25Q64CVSSJG 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 W25Q64CVSSJG meets industry standards.
7.What is the process for return or replacement of W25Q64CVSSJG?
All W25Q64CVSSJG units undergo pre-shipment inspection (PSI). If there is an issue with W25Q64CVSSJG, 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 W25Q64CVSSJG part is unused and in its original packaging.
Return procedure for W25Q64CVSSJG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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