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

DS1744WP-120IND+	2515498 Data Sheet RoHS	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Bytewide 2.97V to 3.63V PWRCP-34	Each	1+ kr406.900 10+ kr352.320 40+ kr351.550 120+ kr344.490	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	2.97V	3.63V	PWRCP	34Pins	Bytewide	-40°C	85°C	-	-
DS1556-70+	2515511 Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Timekeeper NVSRAM Bytewide 4.5 V to 5.5 V EDIP-32	Each	1+ kr619.160 11+ kr501.400 33+ kr491.390 110+ kr481.390	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-
PCF2127T/2Y	2775934RL Data Sheet RoHS Date/Lot Code	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C SPI 1.8V to 4.2V supply SOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr28.920 250+ kr28.270 500+ kr27.950	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.8V	4.2V	SOIC	16Pins	I2C, SPI	-40°C	85°C	-	-
M41T93RMY6F	2806839 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) SPI 2.7V to 5.5V Supply SOIC-18	Each (Supplied on Cut Tape) Cut Tape	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:hh	Alarm RTC	2.7V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-
DS1340C-33#	2729047 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 2.97 V to 5.5 V supply SOIC-16	Each	1+ kr96.780 10+ kr75.360 46+ kr64.590 138+ kr62.200 276+ kr59.050 More Pricing...	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	2.97V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
DS1306E+T&R	2515454RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Day/Date/Month/Year HH:MM:SS Alarm RTC SPI 2 V to 5.5 V Supply TSSOP-20	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr55.780 25+ kr51.650 100+ kr47.190 250+ kr45.020 500+ kr43.600	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	SPI	0°C	70°C	-	-
M41T83ZMY6F	2806838 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.38V to 5.5V SOIC-18	Each	1+ kr50.610 10+ kr38.590 25+ kr35.640 50+ kr34.000 100+ kr32.250 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.38V	5.5V	SOIC	18Pins	I2C	-40°C	85°C	-	-
ISL12057IBZ-T	2983743RL Data Sheet RoHS Date/Lot Code	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.4V to 3.6V Supply NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr18.350 250+ kr16.300 500+ kr14.890 1000+ kr13.810	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.4V	3.6V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3232SN#T&R	2798761RL 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-20	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr98.740 25+ kr84.060 100+ kr74.490 250+ kr72.750 500+ kr71.330	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	5.5V	SOIC	20Pins	I2C	-40°C	85°C	-	-
DS1339BU+T	3404545RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr45.890 25+ kr41.430 100+ kr36.540 250+ kr32.950 500+ kr31.430	Min: 10 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	1.71V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
M41T93ZQA6F	3132494 Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Serial SPI 2.38V to 5.5V QFN-16	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr41.540 10+ kr31.370 25+ kr28.860 50+ kr27.550 100+ kr26.130 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	2.38V	5.5V	QFN	16Pins	Serial, SPI	-40°C	85°C	-	-
DS1340C-33#T&R	3404548RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTCC -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr68.830 25+ kr63.940 100+ kr55.570 250+ kr51.650 500+ kr50.670	Min: 10 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	2.97V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
M41T81M6F	3367096RL Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS REAL-TIME CLOCK W/ALARM -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr17.910 250+ kr17.050 500+ kr16.400 1000+ kr15.970	Min: 100 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1337S+T&R	2515455RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 1.8 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr26.210 250+ kr24.140 500+ kr22.840	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1685-5+	2515424 Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Day/Date/Month/Year/Century hh:mm:ss Multiplexed 4.5 V to 5.5 V DIP-24	Each	1+ kr118.630 16+ kr87.540 32+ kr81.340 112+ kr71.550 256+ kr69.590 More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Alarm RTC	4.5V	5.5V	DIP	24Pins	Multiplexed	0°C	70°C	-	-
DS1302SN+T&R	2515450RL Data Sheet RoHS Date/Lot Code	ANALOG DEVICES RTC Day/Date/Month/Year HH:MM:SS RTC Serial 2 V to 5.5 V Supply WSOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	10+ kr40.670 25+ kr37.520 100+ kr33.380 250+ kr30.770 500+ kr29.140	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	WSOIC	8Pins	Serial	-40°C	85°C	-	-
DS1394U-33+T&R	2515478RL 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	100+ kr33.340 250+ kr30.280 500+ kr28.530	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-
MCP7940MT-I/SN	2901506 Data Sheet RoHS Date/Lot Code	MICROCHIP RTC Alarm 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+ kr7.090 25+ kr6.560 100+ kr6.230	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCA85063ATT/AJ	2890041RL 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) Re-Reel Packaging Options	100+ kr9.290 250+ kr8.720 500+ kr8.400 1000+ kr8.120 2500+ kr7.260	Min: 100 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	1.8V	5.5V	TSSOP	8Pins	I2C	-40°C	105°C	-	AEC-Q100
PCF85063AT/AAZ	2890042RL 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 SOIC 8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr4.970 250+ kr4.640 500+ kr4.450 1000+ kr4.250 2500+ kr4.060	Min: 100 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 12Hr / 24Hr	Calendar, Clock	900mV	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS3232MZ+TRL	2987323RL Data Sheet RoHS	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) I2C 2.3V to 4.5V Supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr85.690 25+ kr76.550 100+ kr70.680 250+ kr67.850 500+ kr66.550	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	4.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCF85363ATL/AX	2890044RL 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) Re-Reel Packaging Options	100+ kr8.360 250+ kr7.850 500+ kr7.540 1000+ kr7.300 2500+ kr7.140	Min: 100 / Mult: 1	YY-MM-DD-DW	HH:MM:SS: 12Hr / 24Hr	Calendar, Clock	900mV	5.5V	DFN2626	10Pins	I2C	-40°C	85°C	-	-
M48T37V-10MH1F	3129609RL Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Parallel 3V to 3.6V Supply SOIC-44	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ kr194.040 25+ kr182.120 50+ kr175.560 100+ kr169.000	Min: 10 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	3V	3.6V	SOIC	44Pins	Parallel	0°C	70°C	-	-
PCA85073ADP/Q900Z	3378955 Data Sheet RoHS Date/Lot Code	NXP RTC/Calendar HH:MM:SS YYYY-MM-DD I2C 900mV to 5.5V -40°C to 105°C TSSOP-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ kr14.680 10+ kr10.680 50+ kr9.670 100+ kr8.580 250+ kr8.060 More Pricing...	Min: 1 / Mult: 1	YYYY-MM-DD	HH:MM:SS	RTCC	900mV	5.5V	TSSOP	8Pins	I2C	-40°C	105°C	-	AEC-Q100
M41T93ZQA6F	3132494RL Data Sheet RoHS Date/Lot Code	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Serial SPI 2.38V to 5.5V QFN-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ kr26.130 250+ kr24.810 500+ kr24.050 1000+ kr20.770	Min: 100 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	2.38V	5.5V	QFN	16Pins	Serial, SPI	-40°C	85°C	-	-