| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Type | Voltage - Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MCP79411-I/SN | Micrel / Microchip Technology | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Tube | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | |
| ISL1208IB8-TK | Intersil | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Alarm, Leap Year, SRAM | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | |
| RX8900CE:UB6 | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | RoHS Compliant | - | - | - | |
| DS1558Y+TRL | Maxim Integrated | IC RTC CLK/CALENDAR PAR 48-LQFP | - | -40°C ~ 85°C | Alarm, Leap Year, Watchdog Timer, Y2K | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | |
| DS1672-33 | Maxim Integrated | IC RTC BINARY CNT I2C 8-DIP | - | -40°C ~ 85°C | Trickle-Charger | Tube | Through Hole | - | - | Binary Counter | 2.97 V ~ 3.63 V | |
| DS17485E-5 | Maxim Integrated | IC RTC CLK/CALENDAR PAR 28-TSOP | - | 0°C ~ 70°C | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | Tray | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | |
| ISL1220IUZ | Intersil | IC RTC CLK/CALENDAR I2C 10-MSOP | - | -40°C ~ 85°C | Alarm, Leap Year, SRAM | Tube | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | |
| CDP68HC68T1EZ | Intersil | IC RTC CLK/CALENDAR SPI 16-DIP | - | -40°C ~ 85°C | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Tray | Through Hole | - | - | Clock/Calendar | 3 V ~ 6 V | |
| DS17887-3-IND | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-EDIP | - | -40°C ~ 85°C | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | Tube | Through Hole | - | - | Clock/Calendar | 2.7 V ~ 3.7 V | |
| RX8900CE:UBB | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | RoHS Compliant | - | - | - |
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.