| Part Number | SST25VF040B-50-4I-QAF-T | SST25VF040B-50-4I-QAE-T | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Active | Active | 
| Memory Type | Non-Volatile | Non-Volatile | 
| Memory Format | Flash | Flash | 
| Technology | Flash | Flash | 
| Memory Size | 4Mb (512K x 8) | 4Mb (512K x 8) | 
| Memory Interface | SPI | SPI | 
| Clock Frequency | 50 MHz | 50 MHz | 
| Write Cycle Time - Word, Page | 10µs | 10µs | 
| Access Time | - | - | 
| Voltage - Supply | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 8-WDFN Exposed Pad | 8-WDFN Exposed Pad | 
| Supplier Device Package | 8-WSON (6x5) | 8-WSON (6x5) |