Real Time Clocks | Farnell Sweden

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

DS1744P-70+	2909725 Data Sheet RoHS	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Parallel 5V PowerCap Module-34	Each	1+ kr459.860 10+ kr366.340 40+ kr339.380 120+ kr327.410 280+ kr311.320	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	4.5V	5.5V	PowerCap Module	34Pins	Parallel	0°C	70°C	-	-
M48T35Y-70MH1F	2849895RL Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Clock/Calendar Date Time Format (YY-MM-DD-dd HH:MM:SS) Parallel 4.5V to 5.5V SOIC-28	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr173.550 25+ kr166.480 50+ kr165.390 100+ kr161.040	Min: 10 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	Calendar, Clock	4.5V	5.5V	SOIC	28Pins	Parallel	0°C	70°C	-	-
DS1683S+T&R	2987317 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Elapsed Time Recorder I2C 2.5V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr78.820 10+ kr57.330 25+ kr50.870 100+ kr43.860 250+ kr40.410 More Pricing...	Min: 1 / Mult: 1	-	-	Elapsed Time Recorder	2.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
ISL12026IBZ-T	2983742RL Data Sheet RoHS Date/Lot Code	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 2.7V to 5.5V Supply NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr25.880 250+ kr23.160 500+ kr21.310 1000+ kr20.990	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.7V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
PCF8563T/F4,118	2841031RL Data Sheet RoHS	NXP RTC Date Time Format (DD:MM:YY HH:MM:SS Century Flag) 400 kbit/s I2C 1.8V to 5.5V SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr10.060 250+ kr9.450 500+ kr9.090 1000+ kr8.540 2500+ kr7.890	Min: 100 / Mult: 1	DD:MM:YY	HH:MM:SS	Alarm RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
ISL12026IBZ-T	2983742 Data Sheet RoHS Date/Lot Code	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 2.7V to 5.5V Supply NSOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr46.540 10+ kr34.580 25+ kr30.340 50+ kr28.160 100+ kr25.880 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.7V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
MCP7940NT-I/MNY	2851655 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 Packaging Options	1+ kr15.440 25+ kr13.480 100+ kr11.200 3300+ kr10.010	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-
PCA85063ATT/AJ	2890041 Data Sheet RoHS Date/Lot Code	NXP RTC Date Time Format (YY-MM-DD-dd HH:MM:SS) I2C 1.8V to 5.5V Supply TSSOP-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr15.740 10+ kr11.590 50+ kr10.540 100+ kr9.290 250+ kr8.720 More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	1.8V	5.5V	TSSOP	8Pins	I2C	-40°C	105°C	-	AEC-Q100
DS3232S#T&R	2830851 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 2.3V to 5.5V Supply SOIC-20	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr100.680 10+ kr92.920 25+ kr85.160 100+ kr75.100 250+ kr72.260 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	SOIC	20Pins	I2C	0°C	70°C	-	-
DS1305E+T&R	3404542 Data Sheet RoHS	ANALOG DEVICES REAL TIME CLOCK 2V TO 5.5V TSSOP-20	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr78.510 10+ kr60.790 25+ kr56.220 100+ kr49.040 250+ kr45.450 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	3 Wire, Serial, SPI	0°C	70°C	-	-
M41T93ZMY6F	3129790 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) SPI 2.38V to 5.5V Supply SOIC-18	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr49.410 10+ kr37.710 25+ kr34.760 50+ kr33.120 100+ kr31.370 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	2.38V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-
MAX31342EWA+T	3581986 Data Sheet RoHS	ANALOG DEVICES RTC -40 TO 85DEG C	Each (Supplied on Full Reel) Full Reel	2500+ kr8.170 7500+ kr7.590	Min: 2500 / Mult: 2500	Day; Date; Month; Year	HH:MM:SS	RTC	1.6V	3.6V	WLP	8Pins	I2C	-40°C	85°C	-	-
X1B0003010001	3253613 Data Sheet RoHS Date/Lot Code	EPSON RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr66.370 10+ kr45.860 25+ kr41.760 50+ kr38.530 100+ kr33.890 More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	1.6V	5.5V	-	10Pins	I2C	-40°C	85°C	-	-
BQ32000D	3118313 RoHS Date/Lot Code	TEXAS INSTRUMENTS RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 3 V to 3.6 V supply SOIC-8	Each	1+ kr16.940 10+ kr16.830 25+ kr16.730 50+ kr16.620 100+ kr16.400 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	3.6V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCA2131TF/Q900Y	3874832RL Data Sheet RoHS Date/Lot Code	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr28.920 250+ kr27.410 500+ kr26.980 1000+ kr26.440	Min: 100 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 12Hr / 24Hr	Calendar, Clock	1.2V	5.5V	HLSON	16Pins	I2C, SPI	-40°C	105°C	-	AEC-Q100
PCF2131TFY	3874833RL Data Sheet RoHS Date/Lot Code	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr23.380 250+ kr22.620 500+ kr21.420 1000+ kr19.570	Min: 100 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 12Hr / 24Hr	Calendar, Clock	1.2V	5.5V	HLSON	16Pins	I2C, SPI	-40°C	85°C	-	AEC-Q100
MCP795W10-I/SL	2361120 Data Sheet RoHS Date/Lot Code	MICROCHIP Alarm RTC IC Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr SPI 1.8 V to 3.6 V SOIC-14	Each	1+ kr18.260 25+ kr17.050 100+ kr16.510 250+ kr15.960	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	3.6V	SOIC	14Pins	SPI	-40°C	85°C	-	AEC-Q100
Q418564C20005	1278031RL 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 Packaging Options	10+ kr66.050 25+ kr62.810 50+ kr59.350 100+ kr52.560 250+ kr45.760	Min: 10 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	12Pins	I2C	-40°C	85°C	-	-
RV-3049-C2-TA-QC-OPT.A	2358514 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr) SPI 1.3 V to 5.5 V SON-10	Each	1+ kr99.500 10+ kr78.180 25+ kr70.900 50+ kr65.900 100+ kr62.420 More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	SPI	-40°C	85°C	-	-
DS1747-70+	2515530 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Timekeeper NVSRAM Bytewide 4.5 V to 5.5 V EDIP-32	Each	1+ kr616.340 10+ kr461.930 30+ kr461.380 100+ kr461.160	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-
DS1390U-33+T&R	2515476 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss:hh) SPI 2.97 V to 5.5 V µSOP-10	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr55.890 10+ kr41.210 25+ kr36.970 100+ kr32.730 250+ kr32.400 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	-	-
DS1340U-33+T&R	2515465RL 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 µSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr33.450 250+ kr30.830 500+ kr29.410	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.97V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1340U-33+	2515382 Data Sheet RoHS	ANALOG DEVICES Real Time Clock/Calendar IC Trickle Charger I2C HH:MM:SS Day; Date; Month; Year 5.5 V µSOP-8	Each	1+ kr62.740 10+ kr48.060 50+ kr42.190 100+ kr40.450 250+ kr38.490 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.97V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1343E-33+	2515361 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) SPI 3 V to 5.5 V TSSOP-20	Each	1+ kr71.990 10+ kr55.570 74+ kr45.780 148+ kr45.020 296+ kr44.260 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	3V	5.5V	TSSOP	20Pins	SPI	-40°C	85°C	-	-
DS1391U-33+T&R	2515477 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+ kr54.800 10+ kr41.860 25+ kr38.600 100+ kr34.250 250+ kr31.750 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	-	-