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| PartNumber | AT93C66-10PI-1.8 | AT93C66-10PI | AT93C66-10PI-2.5 |
| Description | IC EEPROM 4K SPI 2MHZ 8DIP | IC EEPROM 4K SPI 2MHZ 8DIP | IC EEPROM 4K SPI 2MHZ 8DIP |
| Manufacturer | - | Atmel | Atmel |
| Product Category | - | Memory | Memory |
| Series | - | - | - |
| Packaging | - | Tube | Tube |
| Package Case | - | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Operating Temperature | - | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Interface | - | Microwire, 3-Wire Serial | Microwire, 3-Wire Serial |
| Voltage Supply | - | 1.8 V ~ 5.5 V | 2.5 V ~ 5.5 V |
| Supplier Device Package | - | 8-PDIP | 8-PDIP |
| Memory Size | - | 4K (512 x 8 or 256 x 16) | 4K (512 x 8 or 256 x 16) |
| Memory Type | - | EEPROM | EEPROM |
| Speed | - | 250kHz, 1MHz, 2MHz | 500kHz, 1MHz, 2MHz |
| Format Memory | - | EEPROMs - Serial | EEPROMs - Serial |