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

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 Packaging Options	1+ CNY82.010 (CNY92.6713) 10+ CNY63.870 (CNY72.1731) 25+ CNY57.820 (CNY65.3366) 100+ CNY50.910 (CNY57.5283) 250+ CNY48.890 (CNY55.2457) 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	-	-
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 Packaging Options	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	-	-
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+ CNY72.510 (CNY81.9363) 10+ CNY56.670 (CNY64.0371) 25+ CNY52.640 (CNY59.4832) 50+ CNY50.440 (CNY56.9972) 100+ CNY48.240 (CNY54.5112) 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	-	-
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 Packaging Options	1+ CNY83.450 (CNY94.2985) 10+ CNY64.950 (CNY73.3935) 25+ CNY58.760 (CNY66.3988) 100+ CNY51.840 (CNY58.5792) 250+ CNY49.830 (CNY56.3079) 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 Packaging Options	1+ CNY122.190 (CNY138.0747) 10+ CNY95.840 (CNY108.2992) 25+ CNY91.880 (CNY103.8244) 50+ CNY86.440 (CNY97.6772) 100+ CNY81.000 (CNY91.530)	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	Calendar, Clock	4.5V	5.5V	SOIC	28Pins	Parallel	0°C	70°C	-	-
X1B0003010001	3253613 Data Sheet RoHS	EPSON RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY45.170 (CNY51.0421) 10+ CNY35.630 (CNY40.2619) 25+ CNY34.780 (CNY39.3014) 50+ CNY33.930 (CNY38.3409) 100+ CNY33.060 (CNY37.3578) 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+ CNY25.330 (CNY28.6229) 10+ CNY22.170 (CNY25.0521) 25+ CNY18.360 (CNY20.7468) 50+ CNY16.470 (CNY18.6111) 100+ CNY15.200 (CNY17.176) 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+ CNY17.530 (CNY19.8089) 250+ CNY16.630 (CNY18.7919) 500+ CNY16.090 (CNY18.1817) 1000+ CNY15.900 (CNY17.967)	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+ CNY15.340 (CNY17.3342) 250+ CNY15.140 (CNY17.1082) 500+ CNY14.930 (CNY16.8709) 1000+ CNY14.720 (CNY16.6336)	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
PCA2131TF/Q900Y	3874832 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 Packaging Options	1+ CNY28.000 (CNY31.640) 10+ CNY21.140 (CNY23.8882) 25+ CNY19.430 (CNY21.9559) 50+ CNY18.480 (CNY20.8824) 100+ CNY17.530 (CNY19.8089) 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	105°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 Packaging Options	1+ CNY22.930 (CNY25.9109) 10+ CNY17.190 (CNY19.4247) 25+ CNY15.750 (CNY17.7975) 50+ CNY15.550 (CNY17.5715) 100+ CNY15.340 (CNY17.3342) 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
MAX31341CETB+T	3914523 Data Sheet RoHS	ANALOG DEVICES Real Time Clock IC YYYY-MM-DD-dd HH:MM:SS I2C 1.6 to 3.6 V TDFN-10	Each (Supplied on Cut Tape) Cut Tape	1+ CNY16.560 (CNY18.7128) 10+ CNY12.320 (CNY13.9216) 25+ CNY11.240 (CNY12.7012) 100+ CNY10.080 (CNY11.3904) 250+ CNY9.510 (CNY10.7463) More Pricing...	Min: 1 / Mult: 1	YYYY-MM-DD-dd	HH:MM:SS	RTCC	1.6V	3.6V	TDFN	10Pins	I2C	-40°C	85°C	MAX31341C Series	-
MAX31343ETAY+	3924943 Data Sheet RoHS	ANALOG DEVICES Real Time Clock IC YYYY-MM-DD-dd HH:MM:SS I2C 1.6 to 5.5 V TDFN-8	Each (Supplied in a Waffle Tray)	1+ CNY41.290 (CNY46.6577) 10+ CNY31.630 (CNY35.7419) 25+ CNY28.260 (CNY31.9338) 100+ CNY24.970 (CNY28.2161) 490+ CNY23.870 (CNY26.9731) More Pricing...	Min: 1 / Mult: 1	YYYY-MM-DD-dd	HH:MM:SS	RTCC	1.6V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	MAX31343 Series	-
RV-3029-C3-TA-QC-OPT.A	2358510 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+ CNY62.430 (CNY70.5459) 10+ CNY48.630 (CNY54.9519) 25+ CNY44.550 (CNY50.3415) 50+ CNY42.390 (CNY47.9007) 100+ CNY40.620 (CNY45.9006) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-
RV-3049-C2-TB-QA-OPT.A	2358515 Data Sheet RoHS	MICRO CRYSTAL Real Time Clock IC Alarm SPI 24Hr YYYY:MM:DD:Hr:Min:Secs 1.3 V to 5.5 V SON-10	Each	1+ CNY74.650 (CNY84.3545) 10+ CNY58.140 (CNY65.6982) 25+ CNY53.260 (CNY60.1838) 50+ CNY50.690 (CNY57.2797) 100+ CNY48.570 (CNY54.8841) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	Alarm RTC	1.3V	5.5V	SON	10Pins	SPI	-40°C	125°C	-	-
MCP7940N-I/ST	2361116 Data Sheet RoHS	MICROCHIP Alarm RTC IC Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr I2C 1.8 V to 5.5 V TSSOP-8	Each	1+ CNY6.620 (CNY7.4806) 25+ CNY6.110 (CNY6.9043) 100+ CNY5.960 (CNY6.7348)	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	AEC-Q100
PCF8563TS/4,118	2400454RL Data Sheet RoHS	NXP Real Time Clock/Calendar IC Alarm I2C HH:MM:SS Day; Date; Month; Year 1 V to 5.5 V TSSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY7.580 (CNY8.5654) 250+ CNY7.500 (CNY8.475) 500+ CNY7.420 (CNY8.3846) 1000+ CNY7.340 (CNY8.2942) 2500+ CNY7.260 (CNY8.2038)	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
DS1306E+	2515360 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	1+ CNY58.270 (CNY65.8451) 10+ CNY42.900 (CNY48.477) 74+ CNY36.680 (CNY41.4484) 148+ CNY35.220 (CNY39.7986) 296+ CNY33.750 (CNY38.1375) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	TSSOP	20Pins	SPI	0°C	70°C	-	-
DS1339U-33+	2518691 Data Sheet RoHS	ANALOG DEVICES RTC IC Format (Day/Date/Month/Year/ss:mm:hh) I2C Serial 2.97 V to 5.5 V supply MSOP-8	Each	1+ CNY47.000 (CNY53.110) 10+ CNY36.090 (CNY40.7817) 50+ CNY31.410 (CNY35.4933) 100+ CNY29.720 (CNY33.5836) 250+ CNY27.820 (CNY31.4366) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	ss:mm:hh	RTC	2.97V	5.5V	MSOP	8Pins	I2C, Serial	-40°C	85°C	-	-
PCF2129AT/2,518	2400450RL 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) Re-Reel Packaging Options	100+ CNY24.970 (CNY28.2161) 250+ CNY23.870 (CNY26.9731) 500+ CNY23.440 (CNY26.4872)	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.8V	4.2V	SOIC	20Pins	I2C, SPI	-40°C	85°C	-	-
DS1338Z-18+	2515348 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 1.71 V to 5.5 V NSOIC-8	Each	1+ CNY43.850 (CNY49.5505) 10+ CNY30.530 (CNY34.4989) 25+ CNY29.940 (CNY33.8322) 100+ CNY24.970 (CNY28.2161) 300+ CNY24.790 (CNY28.0127) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1340Z-33+T&R	2515466 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.97 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY38.090 (CNY43.0417) 10+ CNY28.880 (CNY32.6344) 25+ CNY26.210 (CNY29.6173) 100+ CNY23.400 (CNY26.442) 250+ CNY21.030 (CNY23.7639) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.97V	5.5V	NSOIC	8Pins	I2C	-40°C	85°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+ CNY54.580 (CNY61.6754) 10+ CNY42.270 (CNY47.7651) 25+ CNY39.030 (CNY44.1039) 100+ CNY34.060 (CNY38.4878) 250+ CNY31.610 (CNY35.7193) 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	-	-
AB0815-T3	3820754 Data Sheet RoHS	ABRACON Real Time Clock HH:MM:SS:hh YY-MM-DD-dd I2C/SPI QFN-EP-16	Each (Supplied on Full Reel) Full Reel Packaging Options	3000+ CNY11.540 (CNY13.0402) 15000+ CNY10.090 (CNY11.4017) 30000+ CNY8.360 (CNY9.4468)	Min: 3000 / Mult: 3000	YY-MM-DD-dd	HH:MM:SS:hh	RTC	1.5V	3.6V	QFN-EP	16Pins	SPI	-40°C	85°C	-	-
RV-3029-C2-TA-QC-OPT.A	2358507 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+ CNY68.290 (CNY77.1677) 10+ CNY53.180 (CNY60.0934) 25+ CNY48.720 (CNY55.0536) 50+ CNY46.360 (CNY52.3868) 100+ CNY44.430 (CNY50.2059) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

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