W25Q128JVSIQ Datasheet, Pinout, Equivalents, and Specs

The W25Q128JVSIQ is a 128M-bit Serial NOR Flash memory integrated circuit manufactured by Winbond. It belongs to the SpiFlash family, offering a high-density, low-pin-count storage solution utilizing the Serial Peripheral Interface (SPI) with support for Dual and Quad I/O modes. This component is widely used for code shadowing to RAM, executing code directly (XIP), and storing firmware, boot code, and application data in a broad range of embedded systems.

What is the W25Q128JVSIQ?

The W25Q128JVSIQ is a non-volatile memory device that provides 16 Mbytes of storage capacity. Its internal architecture is organized into 65,536 programmable pages of 256 bytes each. The memory array can be erased in units of 4KB sectors, 32KB blocks, 64KB blocks, or as a full chip. The serial interface design significantly reduces board space, pin count, and system cost compared to parallel NOR Flash alternatives. It is engineered for high-performance applications requiring fast data transfer rates, achieving up to 133MHz clock speeds in Quad I/O mode, which translates to an equivalent data rate of 532M-bit/s (66M-byte/s).

Pinout Configuration and Packaging

The W25Q128JVSIQ is offered in an 8-pin SOIC 208-mil package, a standard form factor for surface-mount technology. This package provides a balance of small physical footprint and ease of manufacturing. The pin functions are defined for SPI communication and device control.

• /CS (Chip Select): Active-low input to enable the device for an operation.
• DO (IO1) (Data Out): Serial data output pin in standard SPI mode. Acts as I/O pin 1 in Dual/Quad modes.
• /WP (IO2) (Write Protect): Active-low input to prevent write operations to the status register. Acts as I/O pin 2 in Quad mode.
• GND (Ground): System ground reference.
• DI (IO0) (Data In): Serial data input pin in standard SPI mode. Acts as I/O pin 0 in Dual/Quad modes.
• CLK (Serial Clock): Provides the timing for the serial interface.
• /HOLD or /RESET (IO3): Pauses a serial operation when low (if enabled). Acts as I/O pin 3 in Quad mode. Can also be configured as a reset pin.
• VCC (Power Supply): Positive power supply input, typically 3.3V.

Core Architectural Features

• High-Performance Multi-I/O SPI: The device supports standard single SPI, as well as high-throughput Dual SPI and Quad SPI modes. The Quad Page Program instruction allows for faster write times, while Quad I/O Fast Read enables rapid code execution and data access with a maximum clock frequency of 133MHz.
• Flexible Memory Organization: The 128M-bit memory is structured with uniform 4KB sectors and larger 32KB/64KB blocks. This granularity allows for efficient data management and firmware updates, as only specific sectors or blocks need to be erased and reprogrammed, rather than the entire chip.
• Advanced Security and Identification: The W25Q128JVSIQ incorporates multiple security features, including a 256-byte One-Time Programmable (OTP) security register, block/sector protection mechanisms, and a factory-programmed 64-bit unique ID number. These features are critical for securing boot code, storing device-specific keys, and preventing unauthorized firmware modification.
• Low Power Consumption and Wide Voltage Range: Engineered for power-sensitive applications, the device features a low standby current and a deep power-down mode that reduces current consumption to approximately 1µA. It operates over a standard supply voltage range of 2.7V to 3.6V, making it compatible with common embedded system power rails.

Specifications Parameter Table

W25Q128JVSIQ Equivalents, Cross Reference, and Lifecycle

The W25Q128JVSIQ is an active, in-production component from Winbond and is widely available. For procurement managers and engineers facing allocation or long lead times, several pin-to-pin compatible alternatives exist. A common equivalent is the Macronix MX25L12835FMI-10G. Both devices are 128M-bit, operate on a similar voltage range, and are offered in the same SOIC-8 208-mil package, making them potential drop-in replacements from a hardware perspective. Another potential cross-reference is the Micron (now Infineon) MT25QL128ABA1EW7-0SIT. While these alternatives are often pin-compatible, it is critical for engineers to verify software and driver compatibility, as command sets for programming, reading, and status register access can have minor variations between manufacturers.

Typical Application & Circuit Considerations

The W25Q128JVSIQ is primarily used as boot memory for microcontrollers, FPGAs, SoCs, and in IoT devices, networking equipment, and consumer electronics. In a typical circuit, a 0.1µF ceramic decoupling capacitor should be placed as close as possible between the VCC and GND pins to ensure power supply stability. For high-speed Quad SPI operation (above 50MHz), PCB layout is critical. Signal traces for CLK, /CS, and the I/O lines should be kept short, with controlled impedance to minimize signal reflection and ensure data integrity. It is also recommended to have a solid ground plane beneath the device to reduce noise and provide a low-inductance return path.

Video Demonstration

Market Availability and Pricing Trends

The market for high-density NOR Flash memory like the W25Q128JVSIQ is generally stable, but can be subject to supply chain fluctuations and lead time extensions based on global semiconductor demand. Sourcing through authorized distributors or verified independent channels is recommended to mitigate risks of counterfeit parts. To check real-time stock, pricing, or to request a quote for the W25Q128JVSIQ and its verified alternatives, upload your BOM to WWDParts for fast processing.

Alan Carter

Senior Hardware Engineer & Component Specialist

Alan has over 15 years of expertise in embedded systems design, FPGA architecture, and global semiconductor supply chains. He specializes in component cross-referencing, lifecycle management, and helping OEMs navigate supply shortages.

Frequently Asked Questions (FAQs)

What are the key differences between the W25Q128JVSIQ and the W25Q128JVSIM?

The primary difference is the package type. The W25Q128JVSIQ comes in a SOIC-8 208-mil package, which is wider than the W25Q128JVSIM's SOIC-8 150-mil package. While electrically similar, their physical footprints are not compatible, requiring different PCB layouts. Always verify your board design for the correct package.

Can the W25Q128JVSIQ be used as a drop-in replacement for the older W25Q128FVSIQ?

Yes, in most cases. The W25Q128JVSIQ is part of Winbond's "JV" series, which is a newer generation offering improved performance (e.g., higher clock speeds up to 133MHz) and lower power consumption compared to the "FV" series. It is generally considered a compatible upgrade, but it is crucial to review the datasheets for both parts to verify timing and command set compatibility for your specific application.

What are the typical lead times for factory-new W25Q128JVSIQ components?

Standard factory lead times for the W25Q128JVSIQ can range from 16 to 30 weeks, but this is highly variable based on market conditions and allocation. Due to its popularity in consumer electronics and automotive applications, lead times can extend significantly during periods of high demand. For urgent needs, contacting an authorized or qualified independent distributor is recommended.

What is the maximum SPI clock frequency for the W25Q128JVSIQ in Quad I/O mode?

The W25Q128JVSIQ supports a maximum SPI clock frequency of 133MHz when using the Fast Read Quad I/O (QIO) instruction (EBh). This allows for a maximum continuous data transfer rate of 532Mbits/s (133MHz x 4), making it suitable for high-speed applications like code shadowing and data logging.

What is the current lifecycle status of the W25Q128JVSIQ?

As of late 2023, the W25Q128JVSIQ is in "Active" production status and is not considered Not Recommended for New Designs (NRND) or End-of-Life (EOL). It remains a widely used 128Mbit NOR Flash memory. However, it is always best practice to verify the latest status directly with Winbond or an authorized distributor before committing to a new long-term design.

What are the voltage requirements and endurance rating for the W25Q128JVSIQ?

The W25Q128JVSIQ operates on a single power supply voltage ranging from 2.7V to 3.6V for all read, program, and erase operations. It has a high endurance rating, with a minimum of 100,000 program/erase cycles per sector and a data retention period of over 20 years, ensuring high reliability for data storage.

How is the W25Q128JVSIQ packaged for shipment from the factory?

The W25Q128JVSIQ is typically supplied in two standard packaging options. The part number suffix "TR" indicates Tape & Reel packaging, which is standard for automated SMT assembly lines (e.g., W25Q128JVSIQ TR). It is also available in tubes for smaller quantities or manual handling, though this is less common for high-volume production.

What security features are available on the W25Q128JVSIQ?

The W25Q128JVSIQ includes several security features. It contains a factory-programmed, read-only 64-bit Unique ID number that can be used for system authentication. Additionally, it has three 256-byte Security Registers that can be programmed by the user one time (OTP) to store sensitive data like serial numbers or security keys, which can then be locked to prevent further modification.