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| PartNumber | DS1338Z-18+ | DS1338Z-18+T\u0026R | DS1338Z-18 |
| Description | Real Time Clock I2C Serial RTC w/56 Byte NV RAM | Real Time Clock 1.8V Serial RTC | IC RTC CLK/CALENDAR I2C 8-SOIC |
| Manufacturer | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | SOIC-8 | - | - |
| RTC Bus Interface | Serial | - | - |
| Time Format | HH:MM:SS | - | HH:MM:SS (12/24 hr) |
| RTC Memory Size | 56 B | - | - |
| Supply Voltage Max | 1.89 V | - | - |
| Supply Voltage Min | 1.71 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tube | Reel | Tube |
| Function | Calendar, Clock | - | - |
| Product | Real Time Clocks | Real Time Clocks | - |
| Series | DS1338Z | DS1338Z | - |
| Brand | Maxim Integrated | Maxim Integrated | - |
| Product Type | Real Time Clock | Real Time Clock | - |
| Factory Pack Quantity | 100 | 2500 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Part # Aliases | 90-1338Z+018 DS1338Z | 90-1338Z+18T DS1338Z | - |
| Unit Weight | 0.019048 oz | - | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Leap Year, NVSRAM, Square Wave Output |
| Interface | - | - | I2C, 2-Wire Serial |
| Voltage Supply | - | - | 1.71 V ~ 5.5 V |
| Supplier Device Package | - | - | 8-SOIC |
| Memory Size | - | - | 56B |
| Date Format | - | - | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | 1.3 V ~ 3.7 V |
| Current Timekeeping Max | - | - | 100μA @ 1.89V |