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
RTC-4543SA:B0:PURE SN	Epson	IC RTC CLK/CALENDAR SPI 14-SOP	0	$1.67	RFQ
DS1340Z-3+T&R	Maxim Integrated	IC RTC CLK/CALENDAR I2C 8-SOIC	0	$1.66	RFQ
ISL1219IUZ-T	Renesas Electronics America Inc.	IC RTC EVENT REC I2C 10-MSOP	0	$1.66	RFQ
1339-31DVGI	IDT, Integrated Device Technology Inc	IC RTC CLK/CALENDAR I2C 8-MSOP	0	$1.66	RFQ
DS1338U-18+T&R	Maxim Integrated	IC RTC CLK/CALENDAR I2C 8-USOP	0	$1.61	RFQ
DS1338U-3+T&R	Maxim Integrated	IC RTC CLK/CALENDAR I2C 8-USOP	0	$1.61	RFQ
1339-2DVGI8	IDT, Integrated Device Technology Inc	IC RTC CLK/CALENDAR I2C 8-MSOP	0	$1.64	RFQ
DS1338Z-18+T&R	Maxim Integrated	IC RTC CLK/CALENDAR I2C 8-SOIC	0	$1.61	RFQ
MCP795W22T-I/ST	Microchip Technology	IC RTC CLK/CALENDAR SPI 14-TSSOP	0	$1.56	RFQ
ISL1218IUZ-T	Renesas Electronics America Inc.	IC RTC CLK/CALENDAR I2C 8-MSOP	0	$1.60	RFQ