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| PartNumber | MCP7940M-I/SN | MCP7940M-I/P | MCP7940M-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 | Through Hole | SMD/SMT |
| Package / Case | SOIC-8 | PDIP-8 | MSOP-8 |
| RTC Bus Interface | Serial, I2C | Serial, I2C | Serial, I2C |
| Battery Backup Switching | No Backup Switching | 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 | Tube | Tube | Tube |
| Function | Calendar, Clock | Alarm, Calendar, Clock | Calendar, Clock |
| Product | Real Time Clocks | Real Time Clocks | Real Time Clocks |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Moisture Sensitive | Yes | - | - |
| Product Type | Real Time Clock | Real Time Clock | Real Time Clock |
| Factory Pack Quantity | 100 | 60 | 100 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Unit Weight | 0.019048 oz | 0.032805 oz | 0.004938 oz |
| Date Format | - | DW:DM:M:Y | - |
| Time Format | - | HH:MM:SS | - |