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
RTC-7301SF:B3 ROHS Epson IC RTC CLK/CALENDAR PAR 24-SSOP 549 $0.00
RX-4801SA:UB3 PURE SN Epson IC RTC CLK/CALENDAR SPI 14-SOP 362 $6.72
RX-8803LC:UB3 PURE SN Epson IC RTC CLK/CALENDAR I2C 12-VSOJ 500 $0.00
DS1307N+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-DIP 391 $4.06
DS3231M+TRL Maxim Integrated IC RTC CLK/CALENDAR I2C 16-SOIC 1007 $0.00
DS1339BU+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-UMAX 587 $3.98
DS1308U-18+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-UMAX 319 $3.96
DS1339U-2+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-USOP 351 $3.91
RX-4581NB:B3 ROHS Epson IC RTC CLK/CALENDAR SPI 22-SON 630 $0.00
DS1337S+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-SOIC 789 $3.01