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| PartNumber | BU9873FVT-GE2 | BU9873FVM-GTTR | BU9873FVT |
| Description | Real Time Clock I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment | Real Time Clock I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment | |
| Manufacturer | ROHM Semiconductor | ROHM Semiconductor | Rohm Semiconductor |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | - | - |
| Package / Case | TSSOP-8 | MSOP-8 | - |
| Packaging | Reel | Reel | Digi-ReelR Alternate Packaging |
| Brand | ROHM Semiconductor | ROHM Semiconductor | - |
| Product Type | Real Time Clock | Real Time Clock | - |
| Factory Pack Quantity | 3000 | 3000 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Part # Aliases | BU9873FVT | BU9873FVM | - |
| Unit Weight | 0.006737 oz | - | - |
| Series | - | - | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 8-TSSOP (0.173", 4.40mm Width) |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Alarm, Leap Year |
| Interface | - | - | I2C, 2-Wire Serial |
| Voltage Supply | - | - | 1.8 V ~ 5.5 V |
| Supplier Device Package | - | - | 8-TSSOP-B |
| Memory Size | - | - | - |
| Time Format | - | - | HH:MM:SS (12/24 hr) |
| Date Format | - | - | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | - |
| Current Timekeeping Max | - | - | 1μA ~ 1.35μA @ 3V ~ 5.5V |