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| PartNumber | FM93C66EN | FM93C66EM8 | FM93C66EM8X |
| Description | EEPROM 4K-Bit Serial | EEPROM SOIC-8 | |
| Manufacturer | ON Semiconductor | - | - |
| Product Category | EEPROM | - | - |
| RoHS | N | - | - |
| Mounting Style | Through Hole | - | - |
| Package / Case | DIP-8 | - | - |
| Memory Size | 4 kbit | - | - |
| Organization | 256 x 16 | - | - |
| Interface Type | Serial, 3-Wire, Microwire | - | - |
| Data Retention | 40 Year | - | - |
| Maximum Clock Frequency | 1 MHz | - | - |
| Supply Current Max | 1 mA | - | - |
| Supply Voltage Min | 4.5 V | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Height | 3.3 mm | - | - |
| Length | 10.16 mm (Max) | - | - |
| Width | 6.35 mm | - | - |
| Brand | ON Semiconductor / Fairchild | - | - |
| Operating Supply Current | 1 mA | - | - |
| Operating Supply Voltage | 5 V | - | - |
| Product Type | EEPROM | - | - |
| Subcategory | Memory & Data Storage | - | - |
| Unit Weight | 0.032805 oz | - | - |