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
DS12885Q+ Maxim Integrated IC RTC CLK/CALENDAR PAR 28-PLCC 23 $7.69
ISL12024IBZ Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 13 $4.35
RX-4571LC:B3 PURE SN Epson IC RTC CLK/CALENDAR SER 12-VSOJ 0 $0.00
MCP79412-I/ST Microchip Technology IC RTC CLK/CALENDAR I2C 8-TSSOP 14 $1.05
PT7C4307WEX Diodes Incorporated IC RTC CLK/CALENDAR I2C 8-SOIC 67 $0.00
DS1244W-120+ Maxim Integrated IC RTC PHANTOM PAR 28-DIP 0 $27.18
DS1554W-120+ Maxim Integrated IC RTC CLK/CALENDAR PAR 32-EDIP 1 $24.65
DS1558W+ Maxim Integrated IC RTC CLK/CALENDAR PAR 48-LQFP 0 $10.32
RTC-4574NB:B3 ROHS Epson IC RTC CLK/CALENDAR SER 22-SON 0 $0.00
RTC-4574JE:B3 ROHS Epson IC RTC CLK/CALENDAR SER 20-VSOJ 0 $0.00