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
1339-31DCGI8 IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 8-SOIC 0 $1.40
RX8900CE:UB6 Epson IC RTC CALENDAR I2C 10SMD 0 $1.37
MCP795W10T-I/SL Microchip Technology IC RTC CLK/CALENDAR SPI 14-SOIC 0 $1.37
DS1372U+T&R Maxim Integrated IC RTC BINARY CNT I2C 8-USOP 0 $1.35
1339-2DCGI8 IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 8-SOIC 0 $1.31
1338AC-18SRGI8 IDT, Integrated Device Technology Inc IC RTC CLK/CALENDAR I2C 16-SOIC 0 $1.30
ISL12008IB8Z-T Renesas Electronics America Inc. IC RTC CLK/CALENDAR I2C 8-SOIC 0 $1.28
DS1341T+T&R Maxim Integrated IC RTC CLK/CALENDAR I2C 8-TDFN 0 $1.22
RX8010SJ:BB PURE SN Epson IC REAL TIME CLOCK/CALENDAR 0 $1.18
BQ32002D Texas Instruments IC RTC CAL I2C/2-WIRE SER 8SOIC 0 $1.16