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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL12029IB27AZ-T | Intersil | IC RTC CLK/CALENDAR I2C 14-SOIC | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| MCP795W21T-I/SL | Micrel / Microchip Technology | IC RTC CLK/CALENDAR SPI 14-SOIC | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 3.6 V | - | |
| MCP79511T-I/MN | Micrel / Microchip Technology | IC RTC CLK/CALENDAR SPI 10-TDFN | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 3.6 V | - | |
| ISL12027IBZ-T | Intersil | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | - | |
| DS1678+ | Maxim Integrated | IC RTC EVENT REC I2C 8-DIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Time Event Recorder | 4.5 V ~ 5.5 V | - | |
| DS3231MZ+ | Maxim Integrated | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Clock/Calendar | 2.3 V ~ 5.5 V | - | |
| DS1672U-33+T&R | Maxim Integrated | IC RTC BINARY CNT I2C 8-USOP | - | -40°C ~ 85°C | Tape & Reel (TR) | Surface Mount | - | - | Binary Counter | 2.97 V ~ 3.63 V | - | |
| DS17887-3IND+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-EDIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Clock/Calendar | 2.7 V ~ 3.7 V | - | |
| PCF8563P/F4,112 | NXP Semiconductors / Freescale | IC RTC CLK/CALENDAR I2C 8-DIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | - | |
| DS1315N-33+ | Maxim Integrated | IC RTC PHANTOM PAR 16-DIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Phantom Time Chip | 3 V ~ 3.6 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.