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| PartNumber | DS1340U-33+ | DS1340U-3+ | DS1340U-33+T |
| Description | Real Time Clock I2C RTC w/Trickle Charger | Real Time Clock I2C RTC w/Trickle Charger | |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | USOP-8 | uSOP-8 | - |
| RTC Bus Interface | Serial, I2C | Serial | Serial |
| Date Format | YY-MM-DD | - | YY-MM-DD-dd |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS (24 hr) |
| Battery Backup Switching | Backup Switching | Backup Switching | Backup Switching |
| Supply Voltage Max | 5.5 V | 3.3 V | - |
| Supply Voltage Min | 2.97 V | 2.7 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tube | Tube | Digi-ReelR Alternate Packaging |
| Function | Calendar, Clock, Trickle Charger | Calendar, Clock, Trickle Charger | Calendar Clock Trickle Charger |
| Product | Real Time Clocks | Real Time Clocks | Real Time Clocks |
| Series | DS1340U | DS1340U | DS1340U |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Operating Supply Current | 192 uA | - | - |
| Product Type | Real Time Clock | Real Time Clock | - |
| Factory Pack Quantity | 50 | 50 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Part # Aliases | 90-1340U+033 DS1340U | 90-1340U+003 DS1340U | 90-1340U+33T DS1340U |
| Unit Weight | 0.000811 oz | - | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | USOP-8 |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Leap Year, Trickle-Charger |
| Interface | - | - | I2C, 2-Wire Serial |
| Voltage Supply | - | - | 2.97 V ~ 5.5 V |
| Supplier Device Package | - | - | 8-uMAX |
| Memory Size | - | - | - |
| Voltage Supply Battery | - | - | 1.3 V ~ 5.5 V |
| Current Timekeeping Max | - | - | 150μA @ 5.5V |
| Supply Voltage Max | - | - | 5.5 V |
| Supply Voltage Min | - | - | 2.97 V |