RTC 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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RTC

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			Price For		Quantity

M41T00SM6F	2463681 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC IC Date Time Format (Date/Month/Year ss:mm:hh) I2C 2.7 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ £2.450 10+ £1.840 25+ £1.690 50+ £1.610 100+ £1.520 More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	ss:mm:hh	RTC	2.7V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
M41T00SM6F	2463681RL Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC IC Date Time Format (Date/Month/Year ss:mm:hh) I2C 2.7 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ £1.520 250+ £1.440 500+ £1.400 1000+ £1.350	Min: 100 / Mult: 1	DD:MM:YYYY	ss:mm:hh	RTC	2.7V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
AB-RTCMC-32.768KHZ-AIGZ-S7-T	3820847 Data Sheet RoHS Date/Lot Code	ABRACON Real-Time Clock/Calendar IC I2C HH:MM:SS:hh YY-MM-DD-dd -40 °C to 85 °C	Each (Supplied on Full Reel) Full Reel Packaging Options	1000+ £2.130	Min: 1000 / Mult: 1000	YY-MM-DD-dd	HH:MM:SS:hh	RTC	1.3V	4.4V	CLCC	8Pins	I2C	-40°C	85°C	-	-
DP8573AV/NOPB	2492605 RoHS	TEXAS INSTRUMENTS RTC IC Date Time Format (BCD 12Hr / 24Hr) Parallel 4.5 V to 5.5 V LCC-28	Each	1+ £12.490 10+ £10.860 25+ £10.680 50+ £10.120 100+ £9.920	Min: 1 / Mult: 1	BCD	12Hr / 24Hr	RTC	4.5V	5.5V	LCC	28Pins	Parallel	-40°C	85°C	-	-
MAX31342EWA+	3023225 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.6V to 3.6V Supply WLP-8	Each (Supplied on Cut Tape) Cut Tape	1+ £0.959 10+ £0.783 30+ £0.740 100+ £0.696 250+ £0.654	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.6V	3.6V	WLP	8Pins	I2C	-40°C	85°C	-	-
DS1673S-3+	2798731 Data Sheet RoHS	ANALOG DEVICES RTC IC Format (Day/Date/Month/Year hh:mm:ss) 3 Wire Serial 2.7 V to 3.3 V supply WSOIC-20	Each	1+ £8.330	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.7V	3.3V	WSOIC	20Pins	3 Wire, Serial	0°C	70°C	-	-
MAX31342EWA+	3023225RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.6V to 3.6V Supply WLP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ £0.696 250+ £0.654	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.6V	3.6V	WLP	8Pins	I2C	-40°C	85°C	-	-
MCP7940M-I/P	2098894 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 1.8 V to 5.5 V DIP-8	Each	1+ £0.607 25+ £0.558 100+ £0.551 250+ £0.543	Min: 1 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.8V	5.5V	DIP	8Pins	I2C	-40°C	85°C	-	AEC-Q100
Q418564C20005	1278031 Data Sheet RoHS Date/Lot Code	EPSON RTC IC YYYY:MM:DD:Hr:Min:Secs 12Hr / 24Hr 1.8 V to 5.5 V VSOJ 12Pins I2C	Each (Supplied on Cut Tape) Cut Tape	1+ £6.970 10+ £4.650 25+ £4.040 50+ £3.700 100+ £3.350 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	12Pins	I2C	-40°C	85°C	-	-
Q418564710001	1278029 Data Sheet RoHS	EPSON RTC IC YYYY:MM:DD:Hr:Min:Secs 12Hr / 24Hr 1.8 V to 5.5 V VSOJ 20Pins I2C	Each (Supplied on Cut Tape) Cut Tape	1+ £8.460 10+ £5.630 25+ £4.910 50+ £4.490 100+ £4.070 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	20Pins	I2C	-40°C	85°C	-	-
MCP79410-I/SN	1823155 Data Sheet RoHS Date/Lot Code	MICROCHIP RTCC 12C 1K EE 64B SRAM 8SOIC	Each	1+ £0.870 25+ £0.820 100+ £0.813 250+ £0.805	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	MCP79410 MCP79411 MCP79412	AEC-Q100
MCP79410-I/MS	1823153 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C Serial 1.8 V to 5.5 V MSOP-8	Each	1+ £0.798 25+ £0.746 100+ £0.743 250+ £0.739	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	AEC-Q100
RV-4162-C7-TA-QC-020	2358522 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Day/Date/Month/Year/Century 12Hr / 24Hr) I2C 1 V to 4.4 V LCC-8	Each	1+ £3.210 10+ £3.090 25+ £2.970 50+ £2.850 100+ £2.720 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	12Hr / 24Hr	RTC	1V	4.4V	LCC	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	-	-
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-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	-	-
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	-	-
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	-	-
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	-	-
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	-	-
DS1307ZN+T&R	2798724 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	1+ £4.390 10+ £3.360 25+ £3.050 100+ £2.810 250+ £2.660 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-