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
PT7C4311ZEE+DMX Diodes Incorporated IC RTC CAL I2C/2-WIRE SER 8TDFN 0 $0.92
PT7C4363WE Diodes Incorporated IC RTC CAL I2C/2-WIRE SER 8SOIC 0 $0.91
MCP79412T-I/SN Microchip Technology IC RTC CLK/CALENDAR I2C 8-SOIC 0 $0.89
MCP79402T-I/MNY Microchip Technology IC RTC CLK/CALENDAR I2C 8-TDFN 0 $0.89
MCP79401T-I/MNY Microchip Technology IC RTC CLK/CALENDAR I2C 8-TDFN 0 $0.00
S-35399A02-HRT1 ABLIC U.S.A. Inc. IC RTC CLK/CALENDAR 0 $0.88
S-35199A01-HRT1 ABLIC U.S.A. Inc. IC RTC CLK/CALENDAR 0 $0.88
PT7C4337UE Diodes Incorporated IC RTC CLK/CALENDAR I2C MSOP 0 $0.87
MCP79402T-I/MS Microchip Technology IC RTC CLK/CALENDAR I2C 8-MSOP 0 $0.85
MCP79402T-I/ST Microchip Technology IC RTC CLK/CALENDAR I2C 8-TSSOP 0 $0.85