 |  |  | |
| PartNumber | DS1556W-120IND+ | DS1556WP-120+ | DS1556W-120+ |
| Description | Real Time Clock 1M NV RAM Timekeeper | Real Time Clock 1M NV RAM Timekeeper | Real Time Clock 1M NV RAM Timekeeper |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Real Time Clock |
| RoHS | Y | Y | Y |
| Mounting Style | Through Hole | SMD/SMT | Through Hole |
| Package / Case | eDIP-32 | PowerCap Module-34 | eDIP |
| RTC Bus Interface | Parallel | Parallel | Parallel |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS |
| RTC Memory Size | 131072 B | 128 kB | 131072 B |
| Supply Voltage Max | 3.63 V | 3.63 V | 3.63 V |
| Supply Voltage Min | 2.97 V | 2.97 V | 2.97 V |
| Minimum Operating Temperature | - 40 C | 0 C | 0 C |
| Maximum Operating Temperature | + 85 C | + 70 C | + 70 C |
| Packaging | Tube | Tube | Tube |
| Function | Calendar, Clock, NV Timekeeping RAM, Watchdog Timekeeper | Calendar, Clock, NV Timekeeping RAM, Watchdog Timekeeper | Calendar, Clock, NV Timekeeping RAM, Watchdog Timekeeper |
| Product | Real Time Clocks | Real Time Clocks | Real Time Clocks |
| Series | DS1556W | DS1556WP | DS1556W |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | Real Time Clock | Real Time Clock | Real Time Clock |
| Factory Pack Quantity | 11 | 40 | 11 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Part # Aliases | 90-1556W+12I DS1556W | 90-1556W+P12 DS1556WP | 90-1556W+120 DS1556W |
| Date Format | - | DW:DM:M:Y | - |
| Moisture Sensitive | - | Yes | - |