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| PartNumber | DS1501W+ | DS1501WE | DS1501WE+T |
| Description | Real Time Clock Y2K-Compliant Watchdog | Real Time Clock Y2K-Compliant Watchdog | |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | - | - |
| Mounting Style | Through Hole | SMD/SMT | - |
| Package / Case | PDIP-28 | TSOP | - |
| RTC Bus Interface | Parallel | Parallel | - |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS (24 hr) |
| RTC Memory Size | 256 B | 256 B | - |
| Supply Voltage Max | 3.6 V | 3.6 V | - |
| Supply Voltage Min | 3 V | 3 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Packaging | Tube | Bulk | Tape & Reel (TR) Alternate Packaging |
| Function | Alarm, Calendar, Clock, Watchdog Timekeeper | Alarm, Calendar, Clock, Watchdog Timekeeper | - |
| Product | Real Time Clocks | - | - |
| Series | DS1501W | DS1501WE | - |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Product Type | Real Time Clock | Real Time Clocks | - |
| Factory Pack Quantity | 14 | 234 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Part # Aliases | 90-1501W+000 DS1501W | - | - |
| Unit Weight | 0.147798 oz | 0.000705 oz | - |
| Moisture Sensitive | - | Yes | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 28-TSSOP (0.465", 11.80mm Width) |
| Operating Temperature | - | - | 0°C ~ 70°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K |
| Interface | - | - | Parallel |
| Voltage Supply | - | - | 3 V ~ 3.6 V |
| Supplier Device Package | - | - | 28-TSOP |
| Memory Size | - | - | 256B |
| Date Format | - | - | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | 2.5 V ~ 3.7 V |
| Current Timekeeping Max | - | - | 4mA @ 3V ~ 3.6V |