Real Time Clocks | element14 China

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

AB0805-T3	2467702 Data Sheet RoHS	ABRACON RTC IC Day:Date:Month:Year:Century HH:MM:SS:hh 1.5 V to 3.6 V QFN 16Pins I2C	Each (Supplied on Cut Tape) Cut Tape	5+ CNY20.110 (CNY22.7243) 50+ CNY13.240 (CNY14.9612) 250+ CNY12.750 (CNY14.4075) 500+ CNY12.270 (CNY13.8651) 1500+ CNY11.760 (CNY13.2888)	Min: 5 / Mult: 5	Day; Date; Month; Year; Century	HH:MM:SS:hh	RTC	1.5V	3.6V	QFN	16Pins	I2C	-40°C	85°C	-	-
DS1340Z-3+	2515351 Data Sheet RoHS	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+ CNY36.650 (CNY41.4145) 10+ CNY25.200 (CNY28.476) 25+ CNY24.780 (CNY28.0014) 100+ CNY24.350 (CNY27.5155) 300+ CNY23.920 (CNY27.0296) 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	-	-
DS1672S-33+	2515356 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Binary) I2C 2.97 V to 3.63 V NSOIC-8	Each	1+ CNY32.120 (CNY36.2956) 10+ CNY22.540 (CNY25.4702) 25+ CNY22.020 (CNY24.8826) 100+ CNY21.500 (CNY24.295) 300+ CNY20.980 (CNY23.7074) More Pricing...	Min: 1 / Mult: 1	Binary	Binary	RTC	2.97V	3.63V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1305EN+T&R	2515453RL Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) SPI 2 V to 5.5 V TSSOP-20	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY46.710 (CNY52.7823) 25+ CNY42.170 (CNY47.6521) 100+ CNY38.800 (CNY43.844) 250+ CNY37.040 (CNY41.8552) 500+ CNY35.870 (CNY40.5331) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	SPI	-40°C	85°C	-	-
M41ST87WMX6TR	2806826 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 3V to 3.6V Supply SOIC-28	Each (Supplied on Cut Tape) Cut Tape	1+ CNY66.030 (CNY74.6139) 10+ CNY51.410 (CNY58.0933) 25+ CNY47.740 (CNY53.9462) 50+ CNY46.920 (CNY53.0196)	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	3V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-
DS1683S+T&R	2987317 Data Sheet RoHS	ANALOG DEVICES RTC Elapsed Time Recorder I2C 2.5V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY45.390 (CNY51.2907) 10+ CNY34.850 (CNY39.3805) 25+ CNY32.210 (CNY36.3973) 100+ CNY28.330 (CNY32.0129) 250+ CNY27.160 (CNY30.6908) More Pricing...	Min: 1 / Mult: 1	-	-	Elapsed Time Recorder	2.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231MZ+TRL	2515487RL Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY59.910 (CNY67.6983) 25+ CNY55.730 (CNY62.9749) 100+ CNY51.120 (CNY57.7656) 250+ CNY48.960 (CNY55.3248) 500+ CNY46.440 (CNY52.4772) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231M+	2515405 Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V WSOIC-16	Each	1+ CNY87.550 (CNY98.9315) 10+ CNY61.490 (CNY69.4837) 46+ CNY57.830 (CNY65.3479) 138+ CNY56.960 (CNY64.3648) 276+ CNY56.080 (CNY63.3704) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS1302ZN+T&R	2515452RL Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY23.940 (CNY27.0522) 250+ CNY22.620 (CNY25.5606) 500+ CNY21.600 (CNY24.408) 1000+ CNY21.230 (CNY23.9899)	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	NSOIC	8Pins	Serial	-40°C	85°C	-	-
PCF85063ATL/1,118	2427481RL Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HXSON-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY2.870 (CNY3.2431) 500+ CNY2.820 (CNY3.1866) 1000+ CNY2.760 (CNY3.1188) 2500+ CNY2.540 (CNY2.8702) 5000+ CNY2.500 (CNY2.825)	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	HXSON	10Pins	I2C	-40°C	85°C	-	-
AB1805-T3	2467703 Data Sheet RoHS	ABRACON RTC IC Day:Date:Month:Year:Century HH:MM:SS:hh 1.5 V to 3.6 V QFN 16Pins I2C	Each (Supplied on Cut Tape) Cut Tape	5+ CNY21.450 (CNY24.2385) 50+ CNY14.940 (CNY16.8822) 250+ CNY14.080 (CNY15.9104) 500+ CNY13.220 (CNY14.9386) 1500+ CNY12.340 (CNY13.9442)	Min: 5 / Mult: 5	Day; Date; Month; Year; Century	HH:MM:SS:hh	RTC	1.5V	3.6V	QFN	16Pins	I2C	-40°C	85°C	-	-
PCA21125T/Q900/1,1	2400445RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) SPI 1.3 V to 5.5 V supply TSSOP-14	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY9.850 (CNY11.1305) 250+ CNY9.270 (CNY10.4751) 500+ CNY9.220 (CNY10.4186) 1000+ CNY9.160 (CNY10.3508) 2500+ CNY9.100 (CNY10.283)	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.3V	5.5V	TSSOP	14Pins	SPI	-40°C	125°C	-	-
DS1682S+T&R	2515483RL Data Sheet RoHS	ANALOG DEVICES Elapsed Time Recorder IC I2C 2.5 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY43.050 (CNY48.6465) 25+ CNY39.680 (CNY44.8384) 100+ CNY35.140 (CNY39.7082) 250+ CNY33.530 (CNY37.8889) 500+ CNY32.430 (CNY36.6459) More Pricing...	Min: 10 / Mult: 1	-	-	Elapsed Time Recorder	2.5V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1306EN+T&R	2798722 Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V supply TSSOP-20	Each (Supplied on Cut Tape) Cut Tape	1+ CNY55.640 (CNY62.8732) 10+ CNY43.050 (CNY48.6465) 25+ CNY39.680 (CNY44.8384) 100+ CNY35.870 (CNY40.5331) 250+ CNY33.820 (CNY38.2166) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	Serial	-40°C	85°C	-	-
DS1306EN+	2910069 Data Sheet RoHS	ANALOG DEVICES RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) SPI 2V to 5.5V Supply TSSOP-20	Each	1+ CNY62.880 (CNY71.0544) 10+ CNY47.440 (CNY53.6072) 74+ CNY39.610 (CNY44.7593) 148+ CNY38.990 (CNY44.0587) 296+ CNY38.360 (CNY43.3468) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	SPI	-40°C	85°C	-	-
RV-3029-C2 OPTION B	1641059RL Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Year/Month/Date/Hr/Min/Sec 12Hr / 24Hr) I2C 1.3 V to 5.5 V SON-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	5+ CNY32.730 (CNY36.9849) 10+ CNY42.470 (CNY47.9911) 25+ CNY38.890 (CNY43.9457) 50+ CNY37.220 (CNY42.0586) 100+ CNY35.710 (CNY40.3523) More Pricing...	Min: 10 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-
MCP795W10-I/SL	2361120 Data Sheet RoHS	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+ CNY12.860 (CNY14.5318) 25+ CNY12.420 (CNY14.0346) 100+ CNY11.980 (CNY13.5374)	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
RV-3049-C2 OPTION B	1641060RL Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Date/Month/Year hh:mm:ss) 4 Wire SPI 1.3 V to 5.5 V SON-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	5+ CNY32.730 (CNY36.9849) 10+ CNY41.120 (CNY46.4656) 25+ CNY37.650 (CNY42.5445) 50+ CNY36.040 (CNY40.7252) 100+ CNY34.570 (CNY39.0641) More Pricing...	Min: 10 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.3V	5.5V	SON	10Pins	4 Wire, SPI	-40°C	85°C	-	-
Q418564C20005	1278031RL Data Sheet RoHS	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	10+ CNY39.800 (CNY44.974) 25+ CNY36.870 (CNY41.6631)	Min: 10 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	12Pins	I2C	-40°C	85°C	-	-
Q418564710001	1278029RL 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) Re-Reel Packaging Options	10+ CNY55.330 (CNY62.5229)	Min: 10 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	20Pins	I2C	-40°C	85°C	-	-
Q418564C20005	1278031 Data Sheet RoHS	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+ CNY57.720 (CNY65.2236) 10+ CNY39.800 (CNY44.974) 25+ CNY36.870 (CNY41.6631)	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	12Pins	I2C	-40°C	85°C	-	-
RV-8523-C3-TA-QC-020	2358523 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Day/Date/Month/Year/Century 24Hr) I2C 1.2 V to 5.5 V SON-10	Each	1+ CNY55.420 (CNY62.6246) 10+ CNY43.170 (CNY48.7821) 25+ CNY39.530 (CNY44.6689) 50+ CNY37.830 (CNY42.7479) 100+ CNY36.300 (CNY41.019) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	24Hr	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-
RV-3029-C2-TB-QA-OPT.A	2358508 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr) I2C 1.3 V to 5.5 V SON-10	Each	1+ CNY72.680 (CNY82.1284) 10+ CNY56.610 (CNY63.9693) 25+ CNY51.840 (CNY58.5792) 50+ CNY49.610 (CNY56.0593) 100+ CNY47.600 (CNY53.788) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	125°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+ CNY63.720 (CNY72.0036) 10+ CNY55.330 (CNY62.5229)	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.8V	5.5V	VSOJ	20Pins	I2C	-40°C	85°C	-	-
RV-3029-C2 OPTION B	1641059 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Year/Month/Date/Hr/Min/Sec 12Hr / 24Hr) I2C 1.3 V to 5.5 V SON-10	Each (Supplied on Cut Tape) Cut Tape	1+ CNY54.520 (CNY61.6076) 10+ CNY42.470 (CNY47.9911) 25+ CNY38.890 (CNY43.9457) 50+ CNY37.220 (CNY42.0586) 100+ CNY35.710 (CNY40.3523) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	12Hr / 24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

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