| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Type | Voltage - Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DS1501YSN+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 28-SOIC | - | -40°C ~ 85°C | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K | Tube | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | |
| M41T83ZQA6F | STMicroelectronics | IC RTC CLK/CALENDAR I2C 16-QFN | - | -40°C ~ 85°C | Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 2.38 V ~ 5.5 V | |
| DS1693+ | Maxim Integrated | IC RTC CLK/CALENDAR PAR 28-EDIP | - | 0°C ~ 70°C | NVSRAM | Tube | Through Hole | - | - | Clock/Calendar | 2.7 V ~ 3.3 V, 4.5 V ~ 5.5 V | |
| RX-8803LC:UC3 PURE SN | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | - | - | - | - | |
| DS1685EN-3+T&R | Maxim Integrated | IC RTC CLK/CALENDAR PAR 24-TSSOP | - | -40°C ~ 85°C | Alarm, NVSRAM, Square Wave Output, Y2K | Tape & Reel (TR) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 3.7 V | |
| M41T56M6E | STMicroelectronics | IC RTC CLK/CALENDAR I2C 8-SOIC | - | -40°C ~ 85°C | Leap Year, NVSRAM | Tube | Surface Mount | - | - | Clock/Calendar | 4.5 V ~ 5.5 V | |
| RTC-4701JE:B ROHS | Epson | IC TRC CLK/CALENDAR | - | - | - | - | - | - | - | - | - | |
| AB-RTCMC-32.768KHZ-IBO5-S3-T | Abracon Corporation | IC RTC CLK/CALEND I2C 10CLCC ULP | - | -40°C ~ 85°C | Alarm, Square Wave Output, SRAM, Trickle Charge, Watchdog Timer | Original-Reel® | Surface Mount | - | - | Clock/Calendar | 1.5 V ~ 3.6 V | |
| M41T94MQ6F | STMicroelectronics | IC RTC CLK/CALENDAR SPI 16-SOIC | - | -40°C ~ 85°C | Alarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 2.7 V ~ 5.5 V | |
| AB-RTCMC-32.768KHZ-AIGZ-S7-T | Abracon Corporation | IC RTC CLK/CALENDAR I2C 8-CLCC | - | -40°C ~ 85°C | Alarm, Leap Year, Watchdog Timer | Cut Tape (CT) | Surface Mount | - | - | Clock/Calendar | 1 V ~ 4.4 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.