 |  | | |
| PartNumber | DS1391U-3+ | DS1391U-3+T\u0026R | DS1391U-3+TR |
| Description | Real Time Clock Low-V SPI/3-Wire With Trickle Charger | Real Time Clock Low-V SPI/3-Wire With Trickle Charger | |
| Manufacturer | Maxim Integrated | Maxim Integrated | - |
| Product Category | Real Time Clock | Real Time Clock | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | uSOP-10 | uSOP | - |
| RTC Bus Interface | Serial | Serial | - |
| Time Format | HH:MM:SS:hh | HH:MM:SS:hh | - |
| Battery Backup Switching | Backup Switching | Backup Switching | - |
| Supply Voltage Max | 3.3 V | 3.3 V | - |
| Supply Voltage Min | 2.7 V | 2.7 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tube | Reel | - |
| Function | Alarm, Calendar, Clock, Trickle Charger | Alarm, Calendar, Clock, Trickle Charger | - |
| Product | Real Time Clocks | Real Time Clocks | - |
| Series | DS1391U | DS1391U | - |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Product Type | Real Time Clock | Real Time Clock | - |
| Factory Pack Quantity | 50 | 3000 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Part # Aliases | 90-1391U+003 DS1391U | 90-1391U+3TR DS1391U | - |