Real Time Clocks | Farnell Switzerland

Real-Time Clock products offer a diverse range of real-time clock (RTC) solutions for networking and embedded applications. The primary function of RTC is to keep time and calendar data.We offer Real Time Clock (RTC) functions including Alarm RTC, Binary Counter, Real Time Calendar Clock (RTCC), Elapsed Time Recorder and Real Time Event Recorder. Use of a hardware RTC allows microcontrollers like the Raspberry Pi to be used without internet access and still provide services that use time stamps. For example, the DS1307 is a commonly available I2C based RTC module – so using the DS1307’s I2C protocol, which is supported by the Raspberry Pi, real time clock support can easily and cost-effectively be added.Another popular RTC module, also with I2C support, is the DS3231. The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when mains power to the device is interrupted. Accuracy is ±2ppm from 0°C to +40°C, and ±3.5ppm from -40°C to +85°C.Apart from I2C, other interface types include 2 wire, 3 wire, 4 wire, Motorola Serial Peripheral Interface (SPI), Bytewide, Parallel, Multiplexed, and Phantom Clock.Operating temperatures range from -40°C minimum to +125°C maximum. Products are available to the AEC-Q100 Automotive Qualification Standard.

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			Price For		Quantity

DS1302Z+T&R	2515451RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 2.640 250+ CHF 2.410 500+ CHF 2.320	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	NSOIC	8Pins	Serial	0°C	70°C	-	-
DS1340Z-33+T&R	2515466RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.97 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 2.950 250+ CHF 2.650 500+ CHF 2.570	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.97V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1306N+	2515416 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) SPI 2 V to 5.5 V DIP-16	Each	1+ CHF 10.400 10+ CHF 7.250 25+ CHF 6.280 100+ CHF 5.410 250+ CHF 5.220 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	DIP	16Pins	SPI	0°C	70°C	-	-
MCP79521-I/MS	2345962 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC Day/Date/Month/Year HH:MM:SS:hh RTC SPI 1.8 V to 3.6 V Supply MSOP-10	Each	1+ CHF 1.340 25+ CHF 1.290 100+ CHF 1.240 250+ CHF 1.220	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.8V	3.6V	MSOP	10Pins	SPI	-40°C	85°C	AEC-Q100	AEC-Q100
DS1302N+	2515367 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V DIP-8	Each	1+ CHF 5.330 10+ CHF 4.080 50+ CHF 3.550 100+ CHF 3.360 250+ CHF 3.140 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	DIP	8Pins	Serial	-40°C	85°C	-	-
PCF85063ATL/1,118	2427481RL Data Sheet RoHS Date/Lot Code	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HXSON-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 0.411 500+ CHF 0.367 1000+ CHF 0.352 2500+ CHF 0.325 5000+ CHF 0.318	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	HXSON	10Pins	I2C	-40°C	85°C	-	-
DS1746-70+	2515526 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Timekeeper NVSRAM Bytewide 4.5 V to 5.5 V EDIP-32	Each	1+ CHF 45.260 11+ CHF 35.260 33+ CHF 33.800 110+ CHF 32.940	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-
X1B0002320001	2445808 Data Sheet RoHS Date/Lot Code	EPSON RTC IC Calendar 1.6 V to 5.5 V SOP 14Pins I2C SPI	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 5.630 10+ CHF 4.130 25+ CHF 3.920 50+ CHF 3.710 100+ CHF 3.280 More Pricing...	Min: 1 / Mult: 1	-	-	Alarm RTC	1.6V	5.5V	SOP	14Pins	I2C, SPI	-40°C	85°C	-	-
DS1251Y-70+	2515443 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss:hh) Bytewide 4.5 V to 5.5 V EDIP-32	Each	1+ CHF 45.300 10+ CHF 41.830 30+ CHF 40.190 100+ CHF 38.430	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	RTC	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-
PCF8563TS/4,118	2400454RL Data Sheet RoHS Date/Lot Code	NXP Real Time Clock/Calendar IC Alarm I2C HH:MM:SS Day; Date; Month; Year 1 V to 5.5 V TSSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 1.040 250+ CHF 0.979 500+ CHF 0.943 1000+ CHF 0.891 2500+ CHF 0.869	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
DS1394U-33+T&R	2515478 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Day/Date/Month/Year HH:MM:SS:hh Alarm RTC SPI 2.97 V to 5.5 V Supply µSOP-10	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 4.750 10+ CHF 3.630 25+ CHF 3.210 100+ CHF 2.870 250+ CHF 2.600 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-
DS1302SN+	2515359 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V WSOIC-8	Each	1+ CHF 4.510 10+ CHF 3.460 88+ CHF 2.760 176+ CHF 2.710 264+ CHF 2.650 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	WSOIC	8Pins	Serial	-40°C	85°C	-	-
PCF85063TP/1Z	2427483RL Data Sheet RoHS Date/Lot Code	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HWSON-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 0.476 500+ CHF 0.430 1000+ CHF 0.398 2500+ CHF 0.381 5000+ CHF 0.364	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	HWSON	8Pins	I2C	-40°C	85°C	-	-
DS1338U-33+	2515376 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 3 V to 5.5 V µSOP-8	Each	1+ CHF 5.330 10+ CHF 4.080 50+ CHF 3.540 100+ CHF 3.310 250+ CHF 3.120 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
PCF8523T/1,118	2400452RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 1.2 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CHF 0.679 250+ CHF 0.638 500+ CHF 0.613 1000+ CHF 0.590 2500+ CHF 0.554	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1904L-F5#	2765024 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC iButton Date Time Format (Binary/Binary) Serial 2.8 V to 6 V supply F5 MicroCan	Each	1+ CHF 12.300 10+ CHF 10.750 25+ CHF 9.960 100+ CHF 8.730 300+ CHF 8.030 More Pricing...	Min: 1 / Mult: 1	Binary	Binary	RTC	2.8V	6V	Module	2Pins	-	-40°C	85°C	-	-
M41T11MH6F	2849894 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Clock/Calendar Day/Date/Month/Year/Century HH:MM:SS Serial 2V to 5.5V Supply SOIC-28	Each (Supplied on Cut Tape) Cut Tape	1+ CHF 5.370 10+ CHF 4.120 25+ CHF 3.810 50+ CHF 3.640 100+ CHF 3.460 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Calendar, Clock	2V	5.5V	SOIC	28Pins	Serial	-40°C	85°C	-	-
DS1307Z+T&R	2798723 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 4.5 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 4.340 10+ CHF 3.310 25+ CHF 3.040 100+ CHF 2.760 250+ CHF 2.620 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	SOIC	8Pins	I2C	0°C	70°C	-	-
M41ST87WMX6TR	2806826 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 3V to 3.6V Supply SOIC-28	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 8.230 10+ CHF 6.410 25+ CHF 5.950 50+ CHF 5.700 100+ CHF 5.440 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	3V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-
DS3231SN#T&R	2798760RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V supply SOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CHF 9.420 25+ CHF 8.780 100+ CHF 7.860 250+ CHF 7.750 500+ CHF 7.540	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
MCP7940NT-I/SN	2857529 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.8V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 0.778 25+ CHF 0.724 100+ CHF 0.716 3300+ CHF 0.708	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCF85263ATT/AJ	2775936 Data Sheet RoHS Date/Lot Code	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply TSSOP-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 0.997 10+ CHF 0.733 50+ CHF 0.674 100+ CHF 0.602 250+ CHF 0.566 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
PCF85363ATL/AX	2890044 Data Sheet RoHS Date/Lot Code	NXP Real Time Clock/Calendar IC I2C 900 mV to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW DFN2626-10	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 1.260 10+ CHF 0.916 50+ CHF 0.829 100+ CHF 0.736 250+ CHF 0.691 More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 12Hr / 24Hr	Calendar, Clock	900mV	5.5V	DFN2626	10Pins	I2C	-40°C	85°C	-	-
PCF85363ATT/AJ	2775939 Data Sheet RoHS Date/Lot Code	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply TSSOP-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 1.210 10+ CHF 0.875 50+ CHF 0.794 100+ CHF 0.702 250+ CHF 0.659 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
M41ST85WMX6TR	2806825 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.7V to 3.6V Supply SOIC-28	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CHF 6.940 10+ CHF 5.370 25+ CHF 4.970 50+ CHF 4.760 100+ CHF 4.540 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-