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
PT7C4563WEX Diodes Incorporated IC RTC CAL I2C/2-WIRE SER 8SOIC 0 $0.38
M48T08Y-10MH1F STMicroelectronics IC RTC CLK/CALENDAR PAR 28SOH 0 $13.02
RX-8581SA:B:PURE SN Epson IC RTC CLK/CALENDAR I2C 14-SON 0 $3.92
RX-8581SA:B3:PURE SN Epson IC RTC CLK/CALENDAR I2C 14-SON 0 $0.00
RTC-4574SA:B3:PURE SN Epson IC REAL TIME CLOCK/CALENDAR 0 $0.00
MCP795W12-I/SL Microchip Technology IC RTC CLK/CALENDAR SPI 14-SOIC 0 $1.65
PT7C4363BZEEX Diodes Incorporated IC RTC CAL I2C/2-WIRE SER 8TDFN 0 $0.00
MCP79402-I/MS Microchip Technology IC RTC CLK/CALENDAR I2C 8-MSOP 5 $0.97
DS1375T+T&R Maxim Integrated IC RTC CLK/CALENDAR I2C 6-TDFN 0 $0.00
DS12885T+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-TQFP 23 $8.66