Real Time Clocks | Farnell® UK

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

DS1339BU+	2515378 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 1.71 V to 5.5 V µSOP-8	Each	1+ £5.290 10+ £4.070 50+ £3.570 100+ £3.410 250+ £3.250 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1307+	2515369 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C Serial 4.5 V to 5.5 V DIP-8	Each	1+ £4.830 10+ £3.700 50+ £3.240 100+ £3.100 250+ £2.950 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	DIP	8Pins	I2C, Serial	0°C	70°C	-	-
DS1338Z-33+T&R	2515463 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 3 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ £4.530 10+ £3.460 25+ £3.190 100+ £2.870 250+ £2.690 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3232SN#	2518949 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V SOIC-20	Each	1+ £9.070 10+ £8.340 36+ £7.830 108+ £7.180 252+ £6.830 More Pricing...	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	2.3V	5.5V	SOIC	20Pins	I2C	-40°C	85°C	-	-
PCF85063ATL/1,118	2427481 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) Cut Tape	1+ £0.656 10+ £0.471 100+ £0.371 500+ £0.332 1000+ £0.319 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	HXSON	10Pins	I2C	-40°C	85°C	-	-
DS1372U+	2515387 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Binary Counter IC Date Time Format (Binary) I2C 2.4 V to 5.5 V µSOP-8	Each	1+ £3.770 10+ £2.860 50+ £2.500 100+ £2.380 250+ £2.270 More Pricing...	Min: 1 / Mult: 1	Binary	Binary	Binary Counter	2.4V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS3234SN#	2519296 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) SPI 2 V to 5.5 V SOIC-20	Each	1+ £9.260 10+ £8.510 36+ £7.620 108+ £6.990 252+ £6.580 More Pricing...	Min: 1 / Mult: 1	YY-MM-DD	HH:MM:SS	RTC	2V	5.5V	SOIC	20Pins	SPI	-40°C	85°C	-	-
PCF8563TS/4,118	2400454 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) Cut Tape	1+ £1.450 10+ £1.070 50+ £0.973 100+ £0.863 250+ £0.835 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
PCF85063TP/1Z	2427483 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) Cut Tape	1+ £1.210 10+ £0.764 100+ £0.517 500+ £0.411 1000+ £0.372 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	HWSON	8Pins	I2C	-40°C	85°C	-	-
DS3231M+TRL	2515485 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Real Time Clock IC Alarm I2C HH:MM:SS Day; Date; Month; Year 2.3 V to 5.5 V WSOIC-16	Each (Supplied on Cut Tape) Cut Tape	1+ £9.290 10+ £7.280 25+ £6.770 100+ £6.220 250+ £5.950 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS1339U-33+T&R	2515464 Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.97 V to 5.5 V µSOP-8	Each (Supplied on Cut Tape) Cut Tape	1+ £4.700 10+ £3.600 25+ £3.330 100+ £3.020 250+ £2.880 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.97V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1338Z-33+	2518690 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year ss:mm:hh) I2C Serial 3 V to 5.5 V SOIC-8	Each	1+ £5.020 10+ £3.550 25+ £3.390 100+ £3.220 300+ £3.050 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	ss:mm:hh	RTC	3V	5.5V	SOIC	8Pins	I2C, Serial	-40°C	85°C	-	-
DS1682S+	2519150 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Binary) I2C 2.5 V to 5.5 V SOIC-8	Each	1+ £7.360 10+ £5.300 25+ £5.080 100+ £4.850 300+ £4.600 More Pricing...	Min: 1 / Mult: 1	Binary	Binary	RTC	2.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS12887+	2518671 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year 12Hr / 24Hr) Multiplexed 4.5 V to 5.5 V DIP-24	Each	1+ £13.850 14+ £10.700 28+ £10.180 112+ £9.420 252+ £9.090 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	4.5V	5.5V	EDIP	24Pins	Multiplexed	0°C	70°C	-	-
DS1338Z-3+	2515349 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.7 V to 5.5 V NSOIC-8	Each	1+ £4.970 10+ £3.520 25+ £3.360 100+ £3.200 300+ £3.020 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.7V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231SN#	2518948 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V WSOIC-16	Each	1+ £11.190 10+ £9.310 46+ £8.090 138+ £7.520 276+ £7.180 More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	2.3V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS1682S+T&R	2515483 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Elapsed Time Recorder IC I2C 2.5 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ £6.570 10+ £5.080 25+ £4.700 100+ £4.300 250+ £4.100 More Pricing...	Min: 1 / Mult: 1	-	-	Elapsed Time Recorder	2.5V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231S#	2519295 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V WSOIC-16	Each	1+ £10.700 10+ £8.420 46+ £7.540 138+ £6.460 276+ £6.230 More Pricing...	Min: 1 / Mult: 1	YY-MM-DD	HH:MM:SS	RTC	2.3V	5.5V	WSOIC	16Pins	I2C	0°C	70°C	-	-
DS3231MZ+	2515358 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V NSOIC-8	Each	1+ £9.930 10+ £7.260 25+ £6.960 100+ £6.660 300+ £6.330 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231M+	2515405 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V WSOIC-16	Each	1+ £10.010 10+ £7.850 46+ £7.030 138+ £6.610 276+ £6.410 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS3231SN#T&R	2798760 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) Cut Tape	1+ £10.980 10+ £8.640 25+ £8.060 100+ £7.420 250+ £7.110 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
DS3234SN#T&R	2798763 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) SPI 2 V to 5.5 V supply SOIC-20	Each (Supplied on Cut Tape) Cut Tape	1+ £10.530 10+ £8.280 25+ £7.720 100+ £7.100 250+ £6.800 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	SOIC	20Pins	SPI	-40°C	85°C	-	-
PCF8563T/5,518	2775929RL Data Sheet RoHS Date/Lot Code	NXP Real Time Clock/Calendar IC I2C 1 V to 5.5 V HH:MM:SS YY-MM-DD-DW SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ £0.378 250+ £0.353 500+ £0.338 1000+ £0.326 2500+ £0.319	Min: 100 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 24Hr	Calendar, Clock	1V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
MCP79410T-I/MNY	2851649 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC Clock/Calendar Date Time Format (YY-MM-DD-dd HH:MM:SS) I2C 1.8V to 5.5V Supply TDFN-8	Each (Supplied on Cut Tape) Cut Tape	1+ £0.835 25+ £0.776 100+ £0.739 3300+ £0.709	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-
DS1307Z+	2909754 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 4.5V to 5.5V Supply NSOIC-8	Each	1+ £4.560 10+ £3.220 25+ £3.060 100+ £2.900 300+ £2.700 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	-	-