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
DS1393U-18+ Maxim Integrated IC RTC CLK/CALENDAR SER 10-USOP 400 $2.97
ISL1208IU8Z-TK Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-MSOP 661 $0.00
ISL1220IUZ-T Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 10-MSOP 4502 $0.00
ISL1208IRT8Z Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-TDFN 674 $2.94
ISL12082IB8Z Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 596 $2.89
M41T93RQA6F STMicroelectronics IC RTC CLK/CALENDAR SPI 16-QFN 645 $0.00
M41T83ZQA6F STMicroelectronics IC RTC CLK/CALENDAR I2C 16-QFN 859 $0.00
M41T93SQA6F STMicroelectronics IC RTC CLK/CALENDAR SPI 16-QFN 2303 $0.00
RX-8581SA:B3:ROHS Epson IC RTC CLK/CALENDAR I2C 14-SOP 2156 $0.00
DS1342U+T&R Maxim Integrated IC RTC CLK/CALENDAR I2C 8-USOP 1068 $0.00