| PartNumber | DS1244W-120+ | DS1244W-120IND | DS1244W-120 |
| Description | Real Time Clock 256k NV SRAM w/Phantom Clock | Real Time Clock | Real Time Clock |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Real Time Clock |
| RoHS | Y | - | N |
| Mounting Style | Through Hole | - | - |
| Package / Case | EDIP-28 | EDIP-28 | EDIP-28 |
| RTC Bus Interface | Phantom Clock | - | Parallel, Phantom Clock |
| Date Format | YY-MM-DD-dd | - | DW:DM:M:Y |
| Time Format | HH:MM:SS:hh | - | HH:MM:SS:hh |
| Battery Backup Switching | Backup Switching | - | - |
| RTC Memory Size | 256 kB | - | 32768 B |
| Supply Voltage Max | 5 V | - | 3.63 V |
| Supply Voltage Min | 3.3 V | - | 2.97 V |
| Minimum Operating Temperature | 0 C | - | 0 C |
| Maximum Operating Temperature | + 70 C | - | + 70 C |
| Packaging | Tube | - | - |
| Function | Alarm, Calendar, Clock | - | - |
| Memory Type | NV RAM | - | - |
| Product | Real Time Clocks | - | - |
| Series | DS1244W | DS1244W | DS1244W |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | Real Time Clock | Real Time Clocks | Real Time Clocks |
| Factory Pack Quantity | 12 | - | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Part # Aliases | 90-1244W+120 DS1244W | DS1244W | DS1244W |