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

RV-3049-C2 OPTION B	1641060 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) Cut Tape	1+ CNY50.800 (CNY57.404) 10+ CNY40.670 (CNY45.9571) 25+ CNY37.750 (CNY42.6575) 50+ CNY36.030 (CNY40.7139) 100+ CNY34.520 (CNY39.0076) More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.3V	5.5V	SON	10Pins	4 Wire, SPI	-40°C	85°C	-	-
MCP79412T-I/MNY	2361123 Data Sheet RoHS	MICROCHIP Alarm RTC IC Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr I2C 1.8 V to 5.5 V TDFN-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY12.900 (CNY14.577) 25+ CNY11.280 (CNY12.7464) 100+ CNY9.350 (CNY10.5655) 3300+ CNY8.380 (CNY9.4694)	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	AEC-Q100
DS1388Z-33+	2515353 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss:hh) I2C 2.97 V to 3.63 V NSOIC-8	Each	1+ CNY53.800 (CNY60.794) 10+ CNY41.550 (CNY46.9515) 25+ CNY38.490 (CNY43.4937) 100+ CNY35.120 (CNY39.6856) 300+ CNY33.240 (CNY37.5612) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	RTC	2.97V	3.63V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
M41T56M6F	2463679 Data Sheet RoHS	STMICROELECTRONICS RTC IC Date Time Format (Date/Month/Year ss:mm:hh) I2C 4.5 V to 5.5 V SOIC-8	Each (Supplied on Cut Tape) Cut Tape	5+ CNY16.890 (CNY19.0857) 50+ CNY15.660 (CNY17.6958) 100+ CNY14.420 (CNY16.2946) 500+ CNY13.970 (CNY15.7861) 1000+ CNY13.520 (CNY15.2776)	Min: 5 / Mult: 5	DD:MM:YYYY	ss:mm:hh	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1302N+	2515367 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V DIP-8	Each	1+ CNY43.850 (CNY49.5505) 10+ CNY33.590 (CNY37.9567) 50+ CNY29.490 (CNY33.3237) 100+ CNY28.220 (CNY31.8886) 250+ CNY26.890 (CNY30.3857) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	DIP	8Pins	Serial	-40°C	85°C	-	-
DS1390U-33+T&R	2515476RL Data Sheet RoHS	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) Re-Reel Packaging Options	100+ CNY24.760 (CNY27.9788) 250+ CNY23.560 (CNY26.6228) 500+ CNY22.830 (CNY25.7979) 1000+ CNY22.240 (CNY25.1312)	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	-	-
DS1338U-33+	2515376 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 3 V to 5.5 V µSOP-8	Each	1+ CNY43.850 (CNY49.5505) 10+ CNY33.590 (CNY37.9567) 50+ CNY29.490 (CNY33.3237) 100+ CNY28.220 (CNY31.8886) 250+ CNY26.890 (CNY30.3857) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1678S+	2519294 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (YY-MM-DD-dd hh:mm:ss) I2C 4.5 V to 5.5 V supply SOIC-8	Each	1+ CNY74.510 (CNY84.1963) 10+ CNY58.190 (CNY65.7547) 88+ CNY49.960 (CNY56.4548) 176+ CNY48.230 (CNY54.4999) 264+ CNY47.360 (CNY53.5168) More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1683S+	2515357 Data Sheet RoHS	ANALOG DEVICES Elapsed Time Recorder IC I2C 2.5 V to 5.5 V NSOIC-8	Each	1+ CNY48.820 (CNY55.1666) 10+ CNY37.580 (CNY42.4654) 25+ CNY34.770 (CNY39.2901) 100+ CNY31.680 (CNY35.7984) 300+ CNY29.950 (CNY33.8435) More Pricing...	Min: 1 / Mult: 1	-	-	Elapsed Time Recorder	2.5V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
PCF2127AT/2Y	2400449 Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C SPI 1.8V to 4.2V supply SOIC-20	Each (Supplied on Cut Tape) Cut Tape	1+ CNY37.020 (CNY41.8326) 10+ CNY27.910 (CNY31.5383) 25+ CNY26.000 (CNY29.380) 50+ CNY24.800 (CNY28.024) 100+ CNY23.590 (CNY26.6567) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.8V	4.2V	SOIC	20Pins	I2C, SPI	-40°C	85°C	-	-
DS1302ZN+T&R	2515452 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) Cut Tape	1+ CNY37.630 (CNY42.5219) 10+ CNY28.680 (CNY32.4084) 25+ CNY26.450 (CNY29.8885) 100+ CNY24.000 (CNY27.120) 250+ CNY22.830 (CNY25.7979) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	NSOIC	8Pins	Serial	-40°C	85°C	-	-
PCF8523TS/1,118	2427485 Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 1.2 V to 5.5 V TSSOP-14	Each (Supplied on Cut Tape) Cut Tape	1+ CNY9.560 (CNY10.8028) 10+ CNY6.890 (CNY7.7857) 50+ CNY6.580 (CNY7.4354) 100+ CNY6.270 (CNY7.0851) 250+ CNY6.260 (CNY7.0738) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.2V	5.5V	TSSOP	14Pins	I2C	-40°C	85°C	-	-
ISL12057IBZ-T	2983743 Data Sheet RoHS	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) Cut Tape	1+ CNY20.390 (CNY23.0407) 10+ CNY20.090 (CNY22.7017) 25+ CNY19.780 (CNY22.3514) 50+ CNY19.480 (CNY22.0124) 100+ CNY19.160 (CNY21.6508) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.4V	3.6V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
MCP7940NT-I/MNY	2851655 Data Sheet RoHS	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	1+ CNY11.830 (CNY13.3679) 25+ CNY10.350 (CNY11.6955) 100+ CNY8.570 (CNY9.6841) 3300+ CNY7.690 (CNY8.6897)	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-
DS12885S+T&R	2798720 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Bytewide 4.5 V to 5.5 V supply SOIC-24	Each (Supplied on Cut Tape) Cut Tape	1+ CNY83.360 (CNY94.1968) 10+ CNY65.320 (CNY73.8116) 25+ CNY60.810 (CNY68.7153) 100+ CNY55.860 (CNY63.1218) 250+ CNY53.490 (CNY60.4437) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	SOIC	24Pins	Bytewide	0°C	70°C	-	-
PCA85063ATT/AJ	2890041 Data Sheet RoHS	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	1+ CNY11.100 (CNY12.543) 10+ CNY7.430 (CNY8.3959) 50+ CNY6.990 (CNY7.8987) 100+ CNY6.540 (CNY7.3902) 250+ CNY6.150 (CNY6.9495) 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
MCP79512-I/MS	2810108 Data Sheet RoHS	MICROCHIP Calendar Clock IC Day/Date/Month/Year hh:mm:ss:hh Serial SPI 1.8 V to 3.6 V supply MSOP-10	Each	1+ CNY10.220 (CNY11.5486) 25+ CNY10.120 (CNY11.4356) 100+ CNY10.020 (CNY11.3226)	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	Calendar, Clock	1.8V	3.6V	MSOP	10Pins	Serial SPI	-40°C	85°C	-	-
DS3232S#T&R	2830851 Data Sheet RoHS	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	1+ CNY84.840 (CNY95.8692) 10+ CNY66.540 (CNY75.1902) 25+ CNY61.960 (CNY70.0148) 100+ CNY56.920 (CNY64.3196) 250+ CNY54.520 (CNY61.6076) 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	-	-
M48T58Y-70MH1F	2849896 Data Sheet RoHS	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) Cut Tape	1+ CNY174.150 (CNY196.7895) 10+ CNY139.740 (CNY157.9062) 25+ CNY131.180 (CNY148.2334) 50+ CNY126.460 (CNY142.8998) 100+ CNY121.740 (CNY137.5662)	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	Calendar, Clock	4.5V	5.5V	SOIC	28Pins	Parallel	0°C	70°C	-	-
M41ST85WMH6F	2849893 Data Sheet RoHS	STMICROELECTRONICS RTC Clock/Calendar Day/Date/Month/Year/Century HH:MM:SS I2C Serial 2.7V to 3.6V SOIC-28	Each (Supplied on Cut Tape) Cut Tape	1+ CNY77.890 (CNY88.0157) 10+ CNY60.910 (CNY68.8283) 25+ CNY56.660 (CNY64.0258) 50+ CNY54.320 (CNY61.3816) 100+ CNY51.980 (CNY58.7374) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Calendar, Clock	2.7V	3.6V	SOIC	28Pins	I2C, Serial	-40°C	85°C	-	-
X1B0003010001	3253613 Data Sheet RoHS	EPSON RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY36.920 (CNY41.7196) 10+ CNY36.420 (CNY41.1546) 25+ CNY35.900 (CNY40.567) 50+ CNY35.390 (CNY39.9907) 100+ CNY34.870 (CNY39.4031) 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	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+ CNY14.270 (CNY16.1251) 10+ CNY14.050 (CNY15.8765) 25+ CNY13.830 (CNY15.6279) 50+ CNY13.600 (CNY15.368) 100+ CNY13.370 (CNY15.1081) 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	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+ CNY17.540 (CNY19.8202) 250+ CNY16.630 (CNY18.7919) 500+ CNY16.090 (CNY18.1817) 1000+ CNY15.670 (CNY17.7071)	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	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+ CNY15.310 (CNY17.3003) 250+ CNY15.080 (CNY17.0404) 500+ CNY14.850 (CNY16.7805) 1000+ CNY14.620 (CNY16.5206)	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
PCF2131TFY	3874833 Data Sheet RoHS	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) Cut Tape	1+ CNY22.930 (CNY25.9109) 10+ CNY17.250 (CNY19.4925) 25+ CNY15.760 (CNY17.8088) 50+ CNY15.540 (CNY17.5602) 100+ CNY15.310 (CNY17.3003) More Pricing...	Min: 1 / 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

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