| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Type | Voltage - Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RX-8581JE:B0 I2C-BUS | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | - | - | - | - | |
| DS1553W-120 | Maxim Integrated | IC RTC RAM Y2K 3.3V 120NS 28EDIP | - | 0°C ~ 70°C | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | Tube | Through Hole | - | - | Clock/Calendar | 2.97 V ~ 3.63 V | |
| DS17887-5+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-EDIP | - | 0°C ~ 70°C | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | Tube | Through Hole | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | |
| DS2415P+ | Maxim Integrated | IC RTC BINARY CNT SER 6-TSOC | - | -40°C ~ 85°C | Unique ID | Tube | Surface Mount | - | - | Binary Counter | 2.5 V ~ 5.5 V | |
| MCP79402-I/ST | Micrel / Microchip Technology | IC RTC CLK/CALENDAR I2C 8-TSSOP | - | -40°C ~ 85°C | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Tube | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | |
| DS1682S/T&R | Maxim Integrated | IC RTC ELAPSED CNT I2C 8-SOIC | - | -40°C ~ 85°C | Alarm, EEPROM | Tape & Reel (TR) | Surface Mount | - | - | Elapsed Time Counter | 2.5 V ~ 5.5 V | |
| ISL12058IRTZ | Intersil | IC RTC CLK/CALENDAR I2C 8-TDFN | - | -40°C ~ 85°C | Alarm, Leap Year | Tube | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 3.6 V | |
| M41T11MH6E | STMicroelectronics | IC RTC CLK/CALENDAR I2C 28-SOIC | - | -40°C ~ 85°C | Leap Year, NVSRAM | Tube | Surface Mount | - | - | Clock/Calendar | 2 V ~ 5.5 V | |
| MCP79401T-I/ST | Micrel / Microchip Technology | IC RTC CLK/CALENDAR I2C 8-TSSOP | - | -40°C ~ 85°C | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | |
| DS17487N-3 | 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 |
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.