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

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+ CHF 34.900 10+ CHF 30.220 40+ CHF 30.160 120+ CHF 29.550	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+ CHF 53.110 11+ CHF 43.010 33+ CHF 42.150 110+ CHF 41.290	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+ CHF 2.480 250+ CHF 2.430 500+ CHF 2.400	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+ 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: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+ CHF 8.300 10+ CHF 6.460 46+ CHF 5.540 138+ CHF 5.340 276+ CHF 5.060 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+ CHF 4.790 25+ CHF 4.430 100+ CHF 4.050 250+ CHF 3.860 500+ CHF 3.740	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+ CHF 4.350 10+ CHF 3.320 25+ CHF 3.060 50+ CHF 2.920 100+ CHF 2.770 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+ CHF 1.610 250+ CHF 1.430 500+ CHF 1.310 1000+ CHF 1.220	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+ CHF 8.470 25+ CHF 7.210 100+ CHF 6.390 250+ CHF 6.240 500+ CHF 6.120	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+ CHF 3.940 25+ CHF 3.550 100+ CHF 3.130 250+ CHF 2.830 500+ CHF 2.700	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+ CHF 3.570 10+ CHF 2.700 25+ CHF 2.480 50+ CHF 2.370 100+ CHF 2.250 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+ CHF 5.900 25+ CHF 5.480 100+ CHF 4.770 250+ CHF 4.430 500+ CHF 4.350	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+ CHF 1.560 250+ CHF 1.490 500+ CHF 1.430 1000+ CHF 1.390	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+ CHF 2.250 250+ CHF 2.070 500+ CHF 1.960	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+ CHF 10.180 16+ CHF 7.510 32+ CHF 6.980 112+ CHF 6.140 256+ CHF 5.970 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+ CHF 3.490 25+ CHF 3.220 100+ CHF 2.860 250+ CHF 2.640 500+ CHF 2.500	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+ CHF 2.870 250+ CHF 2.600 500+ CHF 2.450	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+ CHF 0.608 25+ CHF 0.562 100+ CHF 0.534	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+ CHF 0.799 250+ CHF 0.750 500+ CHF 0.722 1000+ CHF 0.699 2500+ CHF 0.624	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+ CHF 0.433 250+ CHF 0.404 500+ CHF 0.387 1000+ CHF 0.366 2500+ CHF 0.344	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+ CHF 7.350 25+ CHF 6.570 100+ CHF 6.060 250+ CHF 5.820 500+ CHF 5.710	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+ CHF 0.736 250+ CHF 0.691 500+ CHF 0.664 1000+ CHF 0.642 2500+ CHF 0.629	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+ CHF 16.690 25+ CHF 15.660 50+ CHF 15.100 100+ CHF 14.540	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+ CHF 1.260 10+ CHF 0.916 50+ CHF 0.829 100+ CHF 0.736 250+ CHF 0.691 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+ CHF 2.250 250+ CHF 2.130 500+ CHF 2.070 1000+ CHF 1.790	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	-	-