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| PartNumber | 93C66C-E/SN | 93C66C-E/MS | 93C66C |
| Description | EEPROM 128x8 Or 64x16 | EEPROM 128x8 Or 64x16 | |
| Manufacturer | Microchip | Microchip | Microchip Technology |
| Product Category | EEPROM | EEPROM | Memory |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-8 | MSOP-8 | - |
| Memory Size | 4 kbit | 4 kbit | 4K (512 x 8 or 256 x 16) |
| Organization | 512 x 8, 256 x 16 | 512 x 8, 256 x 16 | 512 x 8 256 x 16 |
| Interface Type | Serial, 3-Wire, Microwire | Serial, 3-Wire, Microwire | Serial 3-Wire Microwire |
| Access Time | 200 ns | 200 ns | 200 ns |
| Data Retention | 200 Year | 200 Year | 200 Years |
| Maximum Clock Frequency | 3 MHz | 3 MHz | 3 MHz |
| Supply Current Max | 2 mA | 2 mA | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 125 C | + 125 C |
| Packaging | Tube | Tube | Tube Alternate Packaging |
| Height | 1.25 mm (Min) | 0.85 mm | - |
| Length | 4.9 mm | 3 mm | - |
| Width | 3.9 mm | 3 mm | - |
| Brand | Microchip Technology | Microchip Technology | - |
| Moisture Sensitive | Yes | - | - |
| Operating Supply Current | 2 mA | 2 mA | 2 mA |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Product Type | EEPROM | EEPROM | - |
| Factory Pack Quantity | 100 | 100 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |
| Unit Weight | 0.019048 oz | 0.019048 oz | 0.019048 oz |
| Series | - | - | - |
| Package Case | - | - | SOIC-8 |
| Operating Temperature | - | - | -40°C ~ 125°C (TA) |
| Interface | - | - | Microwire, 3-Wire Serial |
| Voltage Supply | - | - | 4.5 V ~ 5.5 V |
| Supplier Device Package | - | - | 8-MSOP |
| Memory Type | - | - | EEPROM |
| Speed | - | - | 3MHz |
| Format Memory | - | - | EEPROMs - Serial |
| Supply Current Max | - | - | 2 mA |
| Supply Voltage Max | - | - | 5.5 V |
| Supply Voltage Min | - | - | 4.5 V |