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

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+ CHF 39.450 10+ CHF 31.430 40+ CHF 29.110 120+ CHF 28.090 280+ CHF 26.710	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+ CHF 14.890 25+ CHF 14.280 50+ CHF 14.190 100+ CHF 13.810	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+ CHF 6.860 10+ CHF 4.990 25+ CHF 4.430 100+ CHF 3.820 250+ CHF 3.520 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+ CHF 2.220 250+ CHF 1.990 500+ CHF 1.830 1000+ CHF 1.800	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+ CHF 0.863 250+ CHF 0.811 500+ CHF 0.780 1000+ CHF 0.732 2500+ CHF 0.677	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+ CHF 3.990 10+ CHF 2.970 25+ CHF 2.600 50+ CHF 2.420 100+ CHF 2.220 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+ CHF 1.320 25+ CHF 1.160 100+ CHF 0.961 3300+ CHF 0.859	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+ CHF 1.350 10+ CHF 0.997 50+ CHF 0.906 100+ CHF 0.799 250+ CHF 0.750 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+ CHF 8.660 10+ CHF 7.990 25+ CHF 7.320 100+ CHF 6.460 250+ CHF 6.210 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+ CHF 6.730 10+ CHF 5.210 25+ CHF 4.820 100+ CHF 4.210 250+ CHF 3.900 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+ CHF 4.250 10+ CHF 3.240 25+ CHF 2.990 50+ CHF 2.850 100+ CHF 2.700 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+ CHF 0.713 7500+ CHF 0.662	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+ CHF 5.840 10+ CHF 4.040 25+ CHF 3.680 50+ CHF 3.390 100+ CHF 2.980 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+ CHF 1.460 10+ CHF 1.450 25+ CHF 1.440 50+ CHF 1.430 100+ CHF 1.410 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+ CHF 2.470 250+ CHF 2.340 500+ CHF 2.300 1000+ CHF 2.260	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+ CHF 2.010 250+ CHF 1.940 500+ CHF 1.840 1000+ CHF 1.680	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+ CHF 1.570 25+ CHF 1.470 100+ CHF 1.420 250+ CHF 1.370	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+ CHF 5.810 25+ CHF 5.530 50+ CHF 5.230 100+ CHF 4.630 250+ CHF 4.030	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+ CHF 8.530 10+ CHF 6.710 25+ CHF 6.080 50+ CHF 5.650 100+ CHF 5.350 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+ CHF 52.870 10+ CHF 39.620 30+ CHF 39.580 100+ CHF 39.560	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+ CHF 4.790 10+ CHF 3.540 25+ CHF 3.170 100+ CHF 2.810 250+ CHF 2.780 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+ CHF 2.880 250+ CHF 2.650 500+ CHF 2.530	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+ CHF 5.380 10+ CHF 4.120 50+ CHF 3.620 100+ CHF 3.470 250+ CHF 3.300 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+ CHF 6.170 10+ CHF 4.770 74+ CHF 3.930 148+ CHF 3.860 296+ CHF 3.800 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+ CHF 4.700 10+ CHF 3.590 25+ CHF 3.310 100+ CHF 2.940 250+ CHF 2.720 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	-	-