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
RX-8581SA:B Epson IC RTC CLK/CALENDAR I2C 14-SOP 838 $3.92
ISL12026IBZ-T7A Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 185 $0.00
DS12R885S-5+ Maxim Integrated IC RTC CLK/CALENDAR PAR 24-SOIC 174 $4.11
1338AC-31SRGI IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 16SOIC 174 $3.71
PCF2127AT/2Y NXP USA Inc. IC RTC CLK/CAL I2C/SPI 20-SOIC 215 $0.00
ISL1221IUZ-T Renesas Electronics America Inc. IC RTC EVENT REC I2C 10-MSOP 8991 $0.00
DS1308U-33+T Maxim Integrated IC RTC CLK/CALENDAR I2C 8-UMAX 1952 $0.00
DS1339AU+T Maxim Integrated IC RTC CLK/CALENDAR I2C 8-USOP 346 $0.00
ISL12026IBZ-T Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 2497 $0.00
ISL1209IU10Z-TK Renesas Electronics America Inc. IC RTC EVENT REC I2C 10-MSOP 16176 $0.00