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| PartNumber | DS1338U-3+ | DS1338U-3+T\u0026R | DS1338U-33 |
| Description | Real Time Clock I2C Serial RTC w/56 Byte NV RAM | Real Time Clock I2C Serial RTC w/56 Byte NV RAM | Real Time Clock I2C Serial RTC w/56 Byte NV RAM |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Real Time Clock |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | uSOP-8 | uSOP | uSOP |
| RTC Bus Interface | Serial, I2C | Serial | Serial |
| Date Format | DW:DM:M:Y | - | - |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS |
| RTC Memory Size | 56 B | 56 B | 56 B |
| Supply Voltage Max | 3.3 V | 3.3 V | 5.5 V |
| Supply Voltage Min | 2.7 V | 2.7 V | 3 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tube | Reel | Tube |
| Function | Calendar, Clock | Calendar, Clock | Calendar, Clock |
| Product | Real Time Clocks | Real Time Clocks | - |
| Series | DS1338U | DS1338U | DS1338U |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | Real Time Clock | Real Time Clock | Real Time Clocks |
| Factory Pack Quantity | 50 | 3000 | 50 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Part # Aliases | 90-1338U+003 DS1338U | 90-1338U+3TR DS1338U | DS1338U |