Manufacturer: Winbond Electronics

Key Specifications

• Package: SOP-8
• Core: 4M-bit (512K x 8)
• Memory: 4M-bit Serial Flash
• Interface: SPI (Mode 0/3)
• Voltage: 2.7V - 3.6V
• Temperature: -40°C to +85°C
• Speed: 50MHz (max)
• Density: 4Mbit

The W25X40CVSNAGT is a 4M-bit serial flash memory device from Winbond Electronics, designed for a wide range of embedded applications. It provides a cost-effective and flexible storage solution with a standard SPI interface, supporting both Mode 0 and Mode 3. The device operates over a supply voltage range of 2.7V to 3.6V, making it suitable for many low-power and portable systems.

Key Features

• 4M-bit memory organized as 512K x 8 bits
• SPI interface with clock frequencies up to 50MHz (to be verified for specific speed grade)
• Low power consumption: typical standby current and active current are to be verified
• Wide operating temperature range: -40°C to +85°C
• Flexible erase capability: sector erase (4KB), block erase (32KB and 64KB), and chip erase (to be verified)
• Page program: up to 256 bytes per page (to be verified)
• Write protection: supports status register and individual block protection (to be verified)
• Packaged in SOP-8 (208 mil) for easy PCB integration

Applications

This serial flash is commonly used in firmware storage, data logging, configuration storage, and code shadowing in applications such as:

• Consumer electronics (e.g., set-top boxes, digital cameras)
• Industrial control systems
• Networking equipment (routers, switches)
• PC peripherals (BIOS storage)
• IoT devices and smart sensors

Selection Guidance

When selecting the W25X40CVSNAGT, designers should verify the exact timing parameters and instruction set from the official datasheet. The device is compatible with standard SPI controllers and can be used as a drop-in replacement for similar 4M-bit serial flash parts, but it is recommended to confirm pinout and command compatibility. For applications requiring higher density or faster performance, Winbond offers other series such as W25Q (quad SPI) or higher-capacity devices.