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| PartNumber | DS1391U-33+ | DS1391U-33+T | DS1391U-33 |
| Description | Real Time Clock Low-V SPI/3-Wire With Trickle Charger | Real Time Clock Low-V SPI/3-Wire With Trickle Charge | |
| Manufacturer | Maxim Integrated | MAXIM | Maxim Integrated |
| Product Category | Real Time Clock | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | MSOP-10 | - | - |
| RTC Bus Interface | Serial, SPI | - | - |
| Date Format | YY-MM-DD | - | YY-MM-DD-dd |
| Time Format | HH:MM:SS:hh | - | HH:MM:SS:hh (12/24 hr) |
| 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 | Tube | - | Tube |
| Function | Alarm, Calendar, Clock, Trickle Charger | - | - |
| Product | Real Time Clocks | - | - |
| Series | DS1391U | - | - |
| Brand | Maxim Integrated | - | - |
| Operating Supply Current | 2 mA | - | - |
| Product Type | Real Time Clock | - | - |
| Factory Pack Quantity | 50 | - | - |
| Subcategory | Clock & Timer ICs | - | - |
| Part # Aliases | 90-1391U+033 DS1391U | - | - |
| Unit Weight | 0.005051 oz | - | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Alarm, Leap Year, Square Wave Output, Trickle-Charger |
| Interface | - | - | SPI |
| Voltage Supply | - | - | 2.97 V ~ 5.5 V |
| Supplier Device Package | - | - | 10-uMAX |
| Memory Size | - | - | - |
| Voltage Supply Battery | - | - | 1.3 V ~ 5.5 V |
| Current Timekeeping Max | - | - | 175μA @ 2.97V ~ 5.5V |