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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DS1315S-5 | Maxim Integrated | IC RTC PHANTOM PAR 16-SOIC | - | 0°C ~ 70°C | Tube | Surface Mount | - | - | Phantom Time Chip | 4.5 V ~ 5.5 V | - | |
| PCF85363ATT1/AJ | NXP Semiconductors / Freescale | IC RTC CLK/CALENDAR I2C 10TSSOP | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 0.9 V ~ 5.5 V | - | |
| ISL1208IU8Z-T7A | Intersil | IC RTC CLK/CALENDAR I2C 8-MSOP | - | -40°C ~ 85°C | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| MCP79402T-I/SN | Micrel / Microchip Technology | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | - | |
| DS1343D-3+ | Maxim Integrated | IC RTC CLK/CAL SPI 14TDFN | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| DS1558Y+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 48-LQFP | - | -40°C ~ 85°C | Tray | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | - | |
| DS1306E+T&R | Maxim Integrated | IC RTC CLK/CALENDAR SPI 20-TSSOP | - | 0°C ~ 70°C | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 2 V ~ 5.5 V | - | |
| BQ3285LDSSG4 | N/A | IC RTC CLK/CALENDAR PAR 24-QSOP | - | 0°C ~ 70°C | Tube | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| DS1747P-70IND | Maxim Integrated | IC RTC CLK/CALENDAR PAR 34-PCM | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | - | |
| DS12887A | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-EDIP | - | 0°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.