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| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Type | Voltage - Supply | Shell Style |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MAX6909EO33+T | Maxim Integrated | IC RTC I2C COMPAT 20-QSOP | - | - | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar/Supervisor | 3 V ~ 3.6 V | - | |
| ISL1208IU8-TK | Intersil | IC RTC CLK/CALENDAR I2C 8-MSOP | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| DS12885N+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-DIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | - | |
| RX-4575LC:B3:PURE SN | Epson | IC RTC CLK/CALENDAR SER 12-VSOJ | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 1.6 V ~ 5.5 V | - | |
| DS1342U+ | Maxim Integrated | IC RTC CLK/CALENDAR I2C 8-USOP | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | - | |
| X1288V14-4.5AT1 | Intersil | IC RTC CLK/CALENDAR I2C 14-TSSOP | - | 0°C ~ 70°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | - | |
| 1337GDVGI | IDT (Integrated Device Technology) | IC RTC CLK/CALENDAR I2C 8-TSSOP | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | - | |
| M41T62Q6F | STMicroelectronics | IC RTC CLK/CALENDAR I2C 16-QFN | Timekeeper® | -40°C ~ 85°C | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 1.3 V ~ 4.4 V | - | |
| DS1371U+C01 | Maxim Integrated | IC RTC BINARY CNT I2C 8-USOP | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Binary Counter | 1.7 V ~ 5.5 V | - | |
| RTC-72421B: ROHS | Epson | IC RTC CLK/CALENDAR PAR 18-DIP | - | -10°C ~ 70°C | Tube | Through Hole | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | - |
Real-time clocks (RTCs) are electronic devices that keep track of the current time and date with high accuracy, independent of external power sources. They typically include a built-in crystal oscillator and a battery backup to ensure continuous timekeeping even when the main power is off. RTCs are commonly used in applications such as consumer electronics, industrial automation, medical devices, and automotive systems where precise timekeeping is essential for scheduling tasks, logging events, and time-stamping data.