W25Q64JVSSIQ Serial NOR Flash Specifications and Applications

ElecSuppliers Part Number GuideSep 26, 2026

W25Q64JVSSIQ is a 64Mb Serial NOR Flash memory from Winbond's W25Q-JV family. It is designed for code storage, firmware storage, configuration data, and other non-volatile memory requirements in embedded electronic systems.

The device operates from a 2.7V to 3.6V supply and supports standard SPI as well as Dual SPI and Quad SPI interfaces. The SS suffix identifies the SOP-8 package with a 208 mil body width, providing a conventional surface-mount option for embedded hardware designs.

W25Q64JVSSIQ Memory Capacity

W25Q64JVSSIQ provides 64Mb of non-volatile memory, equivalent to 8MB of storage. The memory array can be used to store firmware, boot code, configuration parameters, lookup tables, graphics, and other data that must remain available after system power is removed.

The 64Mb capacity provides a practical balance between storage density, package size, cost, and interface performance for many embedded systems.

W25Q64JVSSIQ Interface

W25Q64JVSSIQ supports SPI, Dual SPI, and Quad SPI operation. Standard SPI uses a conventional serial interface, while Dual SPI and Quad SPI increase the amount of data transferred per clock cycle by using additional data lines.

The Quad SPI capability can be particularly useful in systems where firmware or other stored data needs to be read quickly during startup or normal operation.

Winbond's W25Q family is designed around Serial Peripheral Interface technology and supports higher-performance multi-I/O operation for applications requiring faster access to non-volatile memory.

W25Q64JVSSIQ Operating Voltage

The operating voltage range of W25Q64JVSSIQ is 2.7V to 3.6V. This makes it suitable for many 3.3V embedded platforms and systems using low-voltage digital processors and controllers.

The power supply should remain within the specified operating range during normal operation. PCB designers should also place appropriate decoupling capacitors close to the Flash memory supply pins to reduce supply noise during switching and programming operations.

W25Q64JVSSIQ Speed

W25Q64JVSSIQ supports Serial Flash operation at frequencies up to 133MHz in the specified STR configuration. The available interface modes allow designers to select a suitable balance between pin usage, throughput, and software compatibility.

Higher interface speed can reduce firmware loading time and improve access performance when the Flash memory is used for executable code, configuration data, or other frequently accessed resources.

Actual system performance depends on the controller, SPI configuration, command sequence, PCB routing, clock frequency, and memory operation being performed.

W25Q64JVSSIQ Package

W25Q64JVSSIQ uses an SOP-8 package with a 208 mil package dimension. The eight-pin package provides a widely used footprint for Serial NOR Flash applications.

The conventional SOP-8 package can simplify PCB assembly and replacement compared with some ultra-small Flash packages. It is also suitable for embedded controllers, industrial equipment, networking products, consumer electronics, and other applications where board space allows a standard surface-mount package.

W25Q64JVSSIQ Operating Temperature

W25Q64JVSSIQ is specified for an industrial operating temperature range of -40°C to +85°C.

This temperature range makes the device suitable for many industrial and commercial embedded applications. Systems exposed to temperatures beyond this range should use a Flash variant with an appropriate extended temperature specification rather than assuming that the standard industrial version is suitable.

Winbond also offers W25Q64JV variants with higher-temperature and automotive specifications, but those versions have different complete part numbers.

W25Q64JVSSIQ Applications

W25Q64JVSSIQ can be used in embedded systems requiring non-volatile code and data storage. Typical applications include microcontroller systems, industrial controllers, networking equipment, routers, printers, storage devices, display systems, surveillance equipment, smart home products, and automotive electronics using appropriate qualified variants.

The W25Q family is also used in Bluetooth and wireless equipment, 5G and Wi-Fi products, computing devices, and other systems that require compact Serial NOR Flash memory.

W25Q64JVSSIQ Firmware Storage

One common use of W25Q64JVSSIQ is external firmware storage. A microcontroller or processor can access the Flash through SPI or Quad SPI to read boot code, firmware images, configuration information, and other non-volatile data.

External Flash memory can provide more storage capacity than the internal memory available in many microcontrollers. It can also make firmware updates easier by providing a dedicated memory device for program images and system data.

For systems using execute-in-place architectures, the controller and software environment must support the required memory interface and access method.

W25Q64JVSSIQ Data Storage

In addition to firmware, W25Q64JVSSIQ can store calibration values, device configuration, fonts, graphics, tables, logs, and other application data.

The non-volatile nature of Serial NOR Flash allows stored information to remain available when the system is powered off. Designers should consider the erase and program characteristics of Flash memory when implementing frequently updated data storage because Flash memory is not equivalent to RAM or EEPROM for continuous high-frequency data writes.

W25Q64JVSSIQ PCB Design Considerations

The SPI clock and data signals should be routed carefully when W25Q64JVSSIQ is operated at high interface speeds. Short signal paths, appropriate grounding, controlled signal integrity, and adequate power supply decoupling can help maintain reliable communication.

The controller should also correctly manage the chip select, clock, data input, data output, and additional Quad SPI signals when using multi-I/O modes.

Software must configure the appropriate Flash commands and status-register settings for the selected operating mode. Incorrect configuration can prevent the controller from reading or programming the memory correctly.

W25Q64JVSSIQ Sourcing

When sourcing W25Q64JVSSIQ, buyers should verify the complete part number because the W25Q64JV family contains multiple package, temperature, and grade variants.

The exact W25Q64JVSSIQ designation identifies the 64Mb industrial version with the SOP-8 208 mil package. Buyers should confirm manufacturer, part number, package, operating temperature range, required quantity, packaging format, and production requirements before placing an order.

For production projects, inventory status and lead time should also be checked because availability can vary between different W25Q64JV package variants.

W25Q64JVSSIQ for Embedded Systems

W25Q64JVSSIQ provides 64Mb of non-volatile Serial NOR Flash storage in a standard SOP-8 package. Its 2.7V to 3.6V supply range, SPI, Dual SPI, and Quad SPI interfaces, together with 133MHz Serial Flash operation, make it suitable for a wide range of embedded memory applications.

For new designs, engineers should verify memory capacity, interface requirements, operating voltage, temperature range, package dimensions, erase and program requirements, and controller compatibility before selecting W25Q64JVSSIQ for production.