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
DS1251W-120IND+ Maxim Integrated IC RTC PHANTOM PAR 32-DIP 0 $38.52
DS1251WP-120+ Maxim Integrated IC RTC PHANTOM PAR 34-PCM 0 $35.46
DS1248WP-120+ Maxim Integrated IC RTC PHANTOM PAR 34-PCM 0 $28.79
DP8570AVX/NOPB Texas Instruments IC RTC CLK/CALENDAR PAR 28-PLCC 0 $20.88
DS17885SN-3+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-SOIC 0 $18.09
DP8573AVX/NOPB Texas Instruments IC RTC CLK/CALENDAR PAR 28-PLCC 0 $13.64
DS17885S-5/T&R+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-SOIC 0 $12.33
DS1501YN+ Maxim Integrated IC RTC CLK/CALENDAR PAR 28DIP 0 $9.39
CDP68HC68T1M2Z Renesas Electronics America Inc. IC RTC CLK/CALENDAR SPI 16-SOIC 0 $9.27
DS1315S-33+T&R Maxim Integrated IC RTC PHANTOM PAR 16-SOIC 0 $9.17