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.

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IDT, Integrated Device Technology Inc 1339AC-31SRGI

IC RTC CLK/CALENDAR I2C 16-SOIC

2.73

IDT, Integrated Device Technology Inc 1339AC-2SRGI

IC RTC CLK/CALENDAR I2C 16-SOIC

2.73

Epson RX-8035SA:AC3 PURE SN

IC RTC RECORDER I2C SER 14SOP

2.68

Epson RTC-4543SA:B:PURE SN

IC RTC CALENDAR 3-WIRE SER 14SOP

2.68

Epson RTC-4543SA:A3:PURE SN

IC RTC CLK/CALENDAR SPI 14-SOP

2.66

Epson RX-8035LC:AC0 PURE SN

IC RTC RECORDER I2C SER 12VSOJ

2.66

Epson RX-8035LC:AA0:PURE SN

IC RTC EVENT REC I2C 12-VSOJ

2.63

Epson RX-8025SA:AC3 PURE SN

IC RTC CAL I2C/2-WIRE SER 14SOP

2.61