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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PT7C4302ZEEX | Texas Instruments | REAL TIME CLOCK W-DFN2030-8 | - | - | - | - | - | - | - | - | - | |
| PCF8523AUG/HAV | NXP Semiconductors / Freescale | IC RTC CLK/CALENDAR I2C 12WLCSP | - | - | - | - | - | - | - | - | - | |
| RX-4571NB:B | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | - | - | - | - | |
| DS1603+ | Maxim Integrated | IC RTC ELAPSED CNT SER 7-SIP | - | 0°C ~ 70°C | Tube | Through Hole | - | - | Elapsed Time Counter | 4.5 V ~ 5.5 V | - | |
| PCF8563TS/4,118 | NXP Semiconductors / Freescale | IC RTC CLK/CALENDAR I2C 8-TSSOP | - | -40°C ~ 85°C | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 1.8 V ~ 5.5 V | - | |
| DS2415P+ | Maxim Integrated | IC RTC BINARY CNT SER 6-TSOC | - | -40°C ~ 85°C | Tube | Surface Mount | - | - | Binary Counter | 2.5 V ~ 5.5 V | - | |
| DS1602+ | Maxim Integrated | IC RTC ELAPSED CNT SER 8-DIP | - | -40°C ~ 85°C | Tube | Through Hole | - | - | Elapsed Time Counter | 4.5 V ~ 5.5 V | - | |
| RX-8581NB:B PURE SN | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | - | - | - | - | |
| RTC-7301DG:B ROHS | Epson | IC RTC CLK/CALENDAR PAR 18-DIP | - | -40°C ~ 85°C | - | Through Hole | Tube | RTC-7301DG:B ROHS | Clock/Calendar | - | 2.4 V ~ 5.5 V | |
| PT7C4372AZEE | Texas Instruments | IC RTC CLOCK 8TDFN | - | - | - | - | - | - | - | - | - |
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.