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| PartNumber | DS1391U-33+T\u0026R | DS1391U-33+T | DS1391U-33+TR |
| Description | Real Time Clock Low-V SPI/3-Wire With Trickle Charger | ||
| Manufacturer | Maxim Integrated | MAXIM | - |
| Product Category | Real Time Clock | Clock/Timing - Real Time Clocks | - |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | uSOP | - | - |
| RTC Bus Interface | Serial | - | - |
| Time Format | HH:MM:SS:hh | - | - |
| Battery Backup Switching | Backup Switching | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 2.97 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Reel | - | - |
| Function | Alarm, Calendar, Clock, Trickle Charger | - | - |
| Product | Real Time Clocks | - | - |
| Series | DS1391U | - | - |
| Brand | Maxim Integrated | - | - |
| Product Type | Real Time Clock | - | - |
| Factory Pack Quantity | 3000 | - | - |
| Subcategory | Clock & Timer ICs | - | - |
| Part # Aliases | 90-1391U+33T DS1391U | - | - |
| Unit Weight | 0.000818 oz | - | - |