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| PartNumber | 93LC66-I/P | 93LC66A-I/SN | 93LC66 |
| Description | EEPROM 512x8 Or 256x16 | EEPROM 512x8 | EEPROM memory, Microwire, 256x16bit, 2.5÷5.5V, 2MHz, TSSOP8 |
| Manufacturer | Microchip | Microchip | ROHM |
| Product Category | EEPROM | EEPROM | Memory |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | SMD/SMT | - |
| Package / Case | PDIP-8 | SOIC-8 | - |
| Memory Size | 4 kbit | 4 kbit | - |
| Organization | 512 x 8, 256 x 16 | 512 x 8 | - |
| Interface Type | Serial, 3-Wire, Microwire | Serial, 3-Wire, Microwire | - |
| Data Retention | 200 Year | 200 Year | - |
| Maximum Clock Frequency | 2 MHz | 2 MHz | - |
| Supply Current Max | 3 mA | 2 mA | - |
| Supply Voltage Min | 2.5 V | 2.5 V | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tube | Tube | - |
| Height | 3.3 mm | 1.25 mm (Min) | - |
| Length | 9.27 mm | 4.9 mm | - |
| Width | 6.35 mm | 3.9 mm | - |
| Brand | Microchip Technology | Microchip Technology | - |
| Operating Supply Current | 3 mA | 2 mA | - |
| Operating Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | - |
| Product Type | EEPROM | EEPROM | - |
| Programming Voltage | 2.5 V to 5.5 V | - | - |
| Factory Pack Quantity | 60 | 100 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |
| Unit Weight | 0.032805 oz | 0.019048 oz | - |
| Access Time | - | 6 ms | - |
| Moisture Sensitive | - | Yes | - |