| PartNumber | MCP7940MT-I/SN | MCP7940MT-I/MNY | MCP7940MT-I/MS |
| Description | Real Time Clock I2C RTCC 64B SRAM No VBAT | Real Time Clock I2C RTCC 64B SRAM No VBAT | Real Time Clock I2C RTCC 64B SRAM No VBAT |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | Real Time Clock | Real Time Clock | Real Time Clock |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-8 | TDFN-8 | MSOP-8 |
| RTC Bus Interface | Serial, I2C | Serial, I2C | Serial, I2C |
| Battery Backup Switching | No Backup Switching | No Backup Switching | No Backup Switching |
| RTC Memory Size | 64 B | 64 B | 64 B |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 1.8 V | 1.8 V | 1.8 V |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Reel | Reel | Reel |
| Function | Calendar, Clock | Calendar, Clock | Calendar, Clock |
| Product | Real Time Clocks | Real Time Clocks | Real Time Clocks |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Moisture Sensitive | Yes | Yes | - |
| Product Type | Real Time Clock | Real Time Clock | Real Time Clock |
| Factory Pack Quantity | 3300 | 3300 | 2500 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Unit Weight | 0.019048 oz | 0.001764 oz | 0.004938 oz |