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
DS1341U+ Maxim Integrated IC RTC CLK/CALENDAR I2C 8-USOP 183 $2.90
ISL12008IB8Z Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 4844 $2.80
DS1344E-18+T&R Maxim Integrated IC RTC CLK/CALENDAR SPI 20-TSSOP 4695 $0.00
PT7C43390WEX Diodes Incorporated IC RTC CLK/CALENDAR I2C 8-SOIC 3308 $0.00
S-35391A-I8T1U ABLIC U.S.A. Inc. IC RTC CLK/CALENDAR I2C SNT-8A 5000 $0.00
DS1554W-120IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 373 $27.50
DS17487-5IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-EDIP 109 $17.36
DS1315E-33+ Maxim Integrated IC RTC PHANTOM PAR 20-TSSOP 148 $16.09
DS17287-3+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-EDIP 294 $14.93
DS1687-3IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-EDIP 342 $14.75