Real Time Clocks

Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral.  They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.

Part Number Manufacturer Description Quantity Price Option
DS1318E+T&R Maxim Integrated IC RTC ELAPSED CNT PAR 24-TSSOP 89 $3.95
RX-8571SA:B3 PURE SN Epson IC RTC CLK/CALENDAR I2C 14-SOP 54 $0.00
ISL1218IUZ Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-MSOP 845 $3.18
ISL1218IBZ Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 860 $3.02
ISL1208IB8Z-T7A Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 277 $2.89
M41T83RQA6F STMicroelectronics IC RTC CLK/CAL I2C 16-VFQFPN 61 $0.00
DS1371U+T&R Maxim Integrated IC RTC BINARY CNT I2C 8-USOP 688 $0.00
1337AGDVGI IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 8-TSSOP 288 $2.80
1339-31DCGI IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 8-SOIC 87 $2.78
1337AGDCGI IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 8-SOIC 291 $2.66