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| PartNumber | DS1556P-70+ | DS1556P-70 | DS1556P-70IND |
| Description | Real Time Clock 1M NV RAM Timekeeper | 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 | N |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | PowerCap | PowerCap | PowerCap |
| RTC Bus Interface | Parallel | Parallel | Parallel |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS |
| RTC Memory Size | 131072 B | 131072 B | 131072 B |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | 0 C | 0 C | - 40 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 85 C |
| Packaging | 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 | - | - |
| Series | DS1556P | DS1556P | DS1556P |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Moisture Sensitive | Yes | - | - |
| Product Type | Real Time Clock | Real Time Clocks | Real Time Clocks |
| Factory Pack Quantity | 20 | - | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Part # Aliases | 90-1556P+070 DS1556P | DS1556P | DS1556P |