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
PCF8563T/5,518 NXP USA Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 15421 $0.00
PCF85063TP/1Z NXP USA Inc. IC RTC CLK/CALENDAR I2C 8-SON 48574 $0.00
DS1248Y-70+ Maxim Integrated IC RTC PHANTOM PAR 32-DIP 586 $34.27
DS1746-70+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 623 $33.38
DS1744-70IND+ Maxim Integrated IC RTC CLK/CALENDAR PAR 28-EDIP 564 $32.48
DS1744-70+ Maxim Integrated IC RTC CLK/CALENDAR PAR 28-EDIP 329 $27.97
DS1554-70+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 805 $25.40
M48T35Y-70PC1 STMicroelectronics IC RTC CLK/CALENDAR PAR 28DIP 1282 $25.09
M48T08-100PC1 STMicroelectronics IC RTC CLK/CALENDAR PAR 28DIP 375 $22.20
M48T08-150PC1 STMicroelectronics IC RTC CLK/CALENDAR PAR 28DIP 506 $22.20