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| PartNumber | W25X40VSIG | W25X40VSNIG | W25X40VSSIG |
| Description | IC FLASH 4M SPI 75MHZ 8SOIC | IC FLASH 4M SPI 75MHZ 8SOIC | |
| Manufacturer | WINBOND | Winbond Electronics | Winbond Electronics |
| Product Category | IC Chips | IC Chips | Memory |
| Series | - | SpiFlashR | SpiFlashR |
| Packaging | - | Tube | Tube |
| Package Case | - | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.209", 5.30mm Width) |
| Operating Temperature | - | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Interface | - | SPI Serial | SPI Serial |
| Voltage Supply | - | 2.7 V ~ 3.6 V | 2.7 V ~ 3.6 V |
| Supplier Device Package | - | 8-SOIC | 8-SOIC |
| Memory Size | - | 4M (512K x 8) | 4M (512K x 8) |
| Memory Type | - | FLASH | FLASH |
| Speed | - | 75MHz | 75MHz |
| Format Memory | - | FLASH | FLASH |