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| PartNumber | X1227S8Z | X1227S8Z-2.7 | X1227S8Z-2.7A |
| Description | IC RTC CLK/CALENDAR I2C 8-SOIC | IC RTC CLK/CALENDAR I2C 8-SOIC | IC RTC CLK/CALENDAR I2C 8-SOIC |
| Manufacturer | Intersil | Intersil | Intersil |
| Product Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
| Series | - | - | - |
| Type | Clock/Calendar | Clock/Calendar | Clock/Calendar |
| Packaging | Tube | Tube | Tube |
| Package Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Features | Alarm, Leap Year, Supervisor, Watchdog Timer | Alarm, Leap Year, Supervisor, Watchdog Timer | Alarm, Leap Year, Supervisor, Watchdog Timer |
| Interface | I2C, 2-Wire Serial | I2C, 2-Wire Serial | I2C, 2-Wire Serial |
| Voltage Supply | 4.5 V ~ 5.5 V | 2.7 V ~ 5.5 V | 2.7 V ~ 5.5 V |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-SOIC |
| Memory Size | - | - | - |
| Time Format | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd |
| Voltage Supply Battery | 1.8 V ~ 5.5 V | 1.8 V ~ 5.5 V | 1.8 V ~ 5.5 V |
| Current Timekeeping Max | 10μA ~ 20μA @ 2.7V ~ 5V | 10μA ~ 20μA @ 2.7V ~ 5V | 10μA ~ 20μA @ 2.7V ~ 5V |