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| PartNumber | DS1688S | DS1688S+ | DS1688 |
| Description | Real Time 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 |
| Mounting Style | SMD/SMT | SMD/SMT | Through Hole |
| Package / Case | SOIC-28 | SOIC-28 | PDIP-28 |
| RTC Bus Interface | Multiplexed | Multiplexed | Multiplexed |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS |
| RTC Memory Size | 114 B | 114 B | 114 B |
| Supply Voltage Max | 5 V | 5 V | 5 V |
| Supply Voltage Min | 3 V | 3 V | 3 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Function | Alarm, Calendar, Clock, NV SRAM Control | Alarm, Calendar, Clock, NV SRAM Control | Alarm, Calendar, Clock, NV SRAM Control |
| Series | DS1688S | DS1688S | DS1688 |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Type | Real Time Clocks | Real Time Clocks | Real Time Clocks |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | Clock & Timer ICs |
| Unit Weight | 0.078125 oz | 0.078125 oz | 0.147798 oz |
| RoHS | - | Y | - |
| Part # Aliases | - | DS1688S | - |
