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| PartNumber | RV-3149-C3 32.768kHz OPTION A TB QA | RV-3149-C3 32.768kHz OPTION A TA QC | RV-3149-C3 32.768kHz OPTION B TA QC |
| Description | Real Time Clock 32.768kHz SPI Time Acc. 6ppm AEC | Real Time Clock 32.768kHz SPI Time Acc. 6ppm | Real Time Clock 32.768kHz SPI Time Acc. 25ppm |
| Manufacturer | Micro Crystal | Micro Crystal | Micro Crystal |
| 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 | 3.7 mm x 2.5 mm | 3.7 mm x 2.5 mm | 3.7 mm x 2.5 mm |
| RTC Bus Interface | SPI | SPI | SPI |
| Battery Backup Switching | Backup Switching | Backup Switching | Backup Switching |
| RTC Memory Size | 8 B | 8 B | 8 B |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 1.3 V | 1.3 V | 1.3 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 85 C | + 85 C |
| Packaging | Reel | Reel | Reel |
| Series | RV-3149 | RV-3149 | RV-3149 |
| Type | Real-Time Clock Module with SPI-Bus | Real-Time Clock Module with SPI-Bus | Real-Time Clock Module with SPI-Bus |
| Brand | Micro Crystal | Micro Crystal | Micro Crystal |
| Product Type | Real Time Clock | Real Time Clock | Real Time Clock |
| Factory Pack Quantity | 1000 | 1000 | 1000 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Part # Aliases | 203641-MG01 | 203658-MG01 | 203605-MG01 |