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
MCP79412T-I/ST	Microchip Technology	IC RTC CLK/CALENDAR I2C 8-TSSOP	0	$0.92	RFQ
MCP79412T-I/MS	Microchip Technology	IC RTC CLK/CALENDAR I2C 8-MSOP	0	$0.92	RFQ
RV-4162-C7-32.768KHZ-20PPM-TA-QC	Micro Crystal AG	IC RTC CLK/CALENDAR I2C 8-SMT	0	$2.35	RFQ
1338-31DVGI8	IDT, Integrated Device Technology Inc	IC RTC CLK/CALENDAR I2C 8-TSSOP	0	$1.12	RFQ
MCP795W11T-I/SL	Microchip Technology	IC RTC CLK/CALENDAR SPI 14-SOIC	0	$1.44	RFQ
RV-3028-C7 32.768KHZ 1PPM-TA-QC	Micro Crystal AG	IC RTC CLK/CALENDAR I2C 8-SMT	0	$0.00	RFQ
DS1390U-3+T&R	Maxim Integrated	IC RTC CLK/CALENDAR SPI 10-MSOP	0	$1.61	RFQ
DS1391U-3+T&R	Maxim Integrated	IC RTC CLK/CALENDAR SPI 10-USOP	0	$1.61	RFQ
DS1374U-3+T&R	Maxim Integrated	IC RTC BINARY CNT I2C 10-USOP	0	$1.61	RFQ
1338AC-31SRGI8	IDT, Integrated Device Technology Inc	IC RTC CLK/CALENDAR I2C 16SOIC	0	$1.96	RFQ