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| Part Number | AT93C66W-10SI-2.5 | 
| Datasheet | AT93C66W-10SI-2.5 datasheet | 
| Description | IC EEPROM 4K SPI 2MHZ 8SOIC | 
| Manufacturer | Microchip Technology | 
| Series | - | 
| Part Status | Obsolete | 
| Memory Type | Non-Volatile | 
| Memory Format | EEPROM | 
| Technology | EEPROM | 
| Memory Size | 4Kb (512 x 8, 256 x 16) | 
| Clock Frequency | 2MHz | 
| Write Cycle Time - Word, Page | 10ms | 
| Access Time | - | 
| Memory Interface | SPI | 
| Voltage - Supply | 2.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | 
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 8-SOIC |