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

DS1337S+	2518709 Data Sheet RoHS	ANALOG DEVICES RTC Format DD:DT:MM;YY ss:mm:hh Up to 2100 year 0.032768 MHz I2C 1.8V to 5.5V SO-8	Each	1+ CNY33.090 (CNY37.3917) 10+ CNY25.120 (CNY28.3856) 25+ CNY23.130 (CNY26.1369) 100+ CNY20.940 (CNY23.6622) 300+ CNY19.720 (CNY22.2836) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	ss:mm:hh	RTC	1.8V	5.5V	SOIC	8Pins	I2C, Serial	-40°C	85°C	-	-
X1B0003110001	2478574 Data Sheet RoHS	EPSON RTC IC XTAL 1.25 V to 5 V 10Pins I2C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY17.820 (CNY20.1366) 10+ CNY14.360 (CNY16.2268) 25+ CNY14.120 (CNY15.9556) 50+ CNY13.890 (CNY15.6957) 100+ CNY13.650 (CNY15.4245) More Pricing...	Min: 1 / Mult: 1	-	-	RTC	1.25V	5V	-	10Pins	I2C	-40°C	85°C	-	-
DS1394U-33+	2515398 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	1+ CNY46.140 (CNY52.1382) 10+ CNY31.700 (CNY35.821) 50+ CNY26.450 (CNY29.8885) 100+ CNY25.980 (CNY29.3574) 250+ CNY25.740 (CNY29.0862) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-
X1B0003010002	2445809 Data Sheet RoHS	EPSON RTC IC Calendar 2.5 V to 5.5 V 14Pins I2C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY26.950 (CNY30.4535) 10+ CNY26.590 (CNY30.0467) 25+ CNY26.210 (CNY29.6173) 50+ CNY25.830 (CNY29.1879) 100+ CNY25.450 (CNY28.7585) More Pricing...	Min: 1 / Mult: 1	-	-	Alarm RTC	2.5V	5.5V	-	10Pins	I2C	-40°C	85°C	-	-
DS1339U-33+T&R	2515464RL Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.97 V to 5.5 V µSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY26.280 (CNY29.6964) 250+ CNY25.040 (CNY28.2952) 500+ CNY24.310 (CNY27.4703) 1000+ CNY23.650 (CNY26.7245)	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.97V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
DS1305N+	2515415 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 DIP-16	Each	1+ CNY77.040 (CNY87.0552) 10+ CNY60.120 (CNY67.9356) 25+ CNY54.290 (CNY61.3477) 100+ CNY45.870 (CNY51.8331) 250+ CNY44.430 (CNY50.2059) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2V	5.5V	DIP	16Pins	SPI	-40°C	85°C	-	-
DS1338Z-33+T&R	2515463 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 3 V to 5.5 V NSOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY38.720 (CNY43.7536) 10+ CNY29.570 (CNY33.4141) 25+ CNY27.280 (CNY30.8264) 100+ CNY24.760 (CNY27.9788) 250+ CNY23.560 (CNY26.6228) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1390U-33+	2515392 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	1+ CNY44.280 (CNY50.0364) 10+ CNY33.960 (CNY38.3748) 50+ CNY29.830 (CNY33.7079) 100+ CNY28.550 (CNY32.2615) 250+ CNY27.200 (CNY30.736) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-
DS1302Z+	2519519 Data Sheet RoHS	ANALOG DEVICES Timekeeper IC Date Time Format (Day/Date/Month/Year hh:mm:ss) 3 Wire Serial 2 V to 5.5 V SOIC-8	Each	1+ CNY40.330 (CNY45.5729) 10+ CNY30.820 (CNY34.8266) 25+ CNY28.450 (CNY32.1485) 100+ CNY25.840 (CNY29.1992) 300+ CNY24.390 (CNY27.5607) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Timekeeper	2V	5.5V	SOIC	8Pins	3 Wire, Serial	0°C	70°C	-	-
DS1339AU+	2515377 Data Sheet RoHS	ANALOG DEVICES Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 1.71 V to 5.5 V µSOP-8	Each	1+ CNY42.530 (CNY48.0589) 10+ CNY32.590 (CNY36.8267) 50+ CNY28.600 (CNY32.318) 100+ CNY27.360 (CNY30.9168) 250+ CNY26.050 (CNY29.4365) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.71V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
X1B0002320001	2445808 Data Sheet RoHS	EPSON RTC IC Calendar 1.6 V to 5.5 V SOP 14Pins I2C SPI	Each (Supplied on Cut Tape) Cut Tape	1+ CNY46.630 (CNY52.6919) 10+ CNY36.770 (CNY41.5501) 25+ CNY35.900 (CNY40.567) 50+ CNY35.020 (CNY39.5726) 100+ CNY34.130 (CNY38.5669) More Pricing...	Min: 1 / Mult: 1	-	-	Alarm RTC	1.6V	5.5V	SOP	14Pins	I2C, SPI	-40°C	85°C	-	-
DS3231M+TRL	2515485RL Data Sheet RoHS	ANALOG DEVICES Real Time Clock IC Alarm I2C HH:MM:SS Day; Date; Month; Year 2.3 V to 5.5 V WSOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY62.960 (CNY71.1448) 25+ CNY58.560 (CNY66.1728) 100+ CNY53.810 (CNY60.8053) 250+ CNY51.460 (CNY58.1498) 500+ CNY50.150 (CNY56.6695) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.3V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS1388Z-5+	2515354 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss:hh) I2C 4.5 V to 5.5 V NSOIC-8	Each	1+ CNY55.340 (CNY62.5342) 10+ CNY42.790 (CNY48.3527) 25+ CNY39.650 (CNY44.8045) 100+ CNY36.190 (CNY40.8947) 300+ CNY34.270 (CNY38.7251) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS:hh	RTC	4.5V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
RV-8564-C2	1539389 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 1.2 V to 5.5 V SON-10	Each (Supplied on Cut Tape) Cut Tape	1+ CNY50.930 (CNY57.5509) 10+ CNY40.780 (CNY46.0814) 25+ CNY37.850 (CNY42.7705) 50+ CNY36.130 (CNY40.8269) 100+ CNY34.610 (CNY39.1093) More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-
DS1337S+T&R	2515455 Data Sheet RoHS	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) Cut Tape	1+ CNY29.130 (CNY32.9169) 10+ CNY22.050 (CNY24.9165) 25+ CNY20.270 (CNY22.9051) 100+ CNY18.310 (CNY20.6903) 250+ CNY17.380 (CNY19.6394) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1305E+	2729118 Data Sheet RoHS	ANALOG DEVICES RTC IC Format (Day/Date/Month/Year/12Hr / 24Hr) 3 Wire Serial 2 V to 5.5 V supply TSSOP-20	Each	1+ CNY63.020 (CNY71.2126) 10+ CNY48.930 (CNY55.2909) 74+ CNY42.250 (CNY47.7425) 148+ CNY40.680 (CNY45.9684) 296+ CNY39.390 (CNY44.5107) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	12Hr / 24Hr	RTC	2V	5.5V	TSSOP	20Pins	3 Wire, Serial	0°C	70°C	-	-
DS1338C-33#	2765023 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C 3 V to 5.5 V supply SOIC-16	Each	1+ CNY68.360 (CNY77.2468) 10+ CNY53.210 (CNY60.1273) 46+ CNY47.390 (CNY53.5507) 138+ CNY44.500 (CNY50.285) 276+ CNY43.090 (CNY48.6917) More Pricing...	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
MCP7940N-I/MS	2774923 Data Sheet RoHS	MICROCHIP Alarm RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 1.8 V to 5.5 V supply MSOP-8	Each	1+ CNY6.730 (CNY7.6049) 25+ CNY6.210 (CNY7.0173) 100+ CNY5.980 (CNY6.7574)	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-
PCF85263AT/AJ	2775933 Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	5+ CNY5.070 (CNY5.7291) 50+ CNY4.770 (CNY5.3901) 100+ CNY4.470 (CNY5.0511) 500+ CNY4.410 (CNY4.9833) 1000+ CNY4.370 (CNY4.9381)	Min: 5 / Mult: 5	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCF2123BS/1,518	2775940 Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 1.1 V to 5.5 V supply HVQFN-16	Each (Supplied on Cut Tape) Cut Tape	1+ CNY9.850 (CNY11.1305) 10+ CNY6.510 (CNY7.3563) 50+ CNY6.150 (CNY6.9495) 100+ CNY5.780 (CNY6.5314) 250+ CNY5.420 (CNY6.1246) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.1V	5.5V	HVQFN	16Pins	I2C	-40°C	85°C	-	-
M41T94MQ6F	2806843 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) SPI 2.7V to 5.5V Supply SOIC-16	Each (Supplied on Cut Tape) Cut Tape	1+ CNY40.700 (CNY45.991) 10+ CNY31.190 (CNY35.2447) 25+ CNY28.770 (CNY32.5101) 50+ CNY27.460 (CNY31.0298) 100+ CNY26.140 (CNY29.5382) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	SOIC	16Pins	SPI	-40°C	85°C	-	-
M41T93RMY6F	2806839 Data Sheet RoHS	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+ CNY79.130 (CNY89.4169) 10+ CNY61.930 (CNY69.9809) 25+ CNY57.610 (CNY65.0993) 50+ CNY55.240 (CNY62.4212) 100+ CNY52.860 (CNY59.7318) 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	-	-
M48T35AV-10MH1F	2849939 Data Sheet RoHS	STMICROELECTRONICS RTC Clock/Calendar Date Time Format (YY-MM-DD-dd HH:MM:SS) Parallel 3V to 3.6V Supply SOIC-28	Each	1+ CNY152.480 (CNY172.3024) 10+ CNY132.940 (CNY150.2222) 25+ CNY124.660 (CNY140.8658) 50+ CNY123.200 (CNY139.216) 100+ CNY115.660 (CNY130.6958)	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	Calendar, Clock	3V	3.6V	SOIC	28Pins	Parallel	0°C	70°C	-	-
MCP79401-I/MS	2947744 Data Sheet RoHS	MICROCHIP RTCC Date Time Format (YY/MM/DD/dd HH:MM:SS) I2C 1.8V to 5.5V Supply MSOP-8	Each	1+ CNY7.940 (CNY8.9722) 25+ CNY7.850 (CNY8.8705) 100+ CNY7.760 (CNY8.7688)	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-
ISL12057IUZ-T	2983744 Data Sheet RoHS	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.4V to 3.6V Supply MSOP-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY26.670 (CNY30.1371) 10+ CNY18.670 (CNY21.0971) 25+ CNY16.060 (CNY18.1478) 50+ CNY14.680 (CNY16.5884) 100+ CNY13.300 (CNY15.029) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.4V	3.6V	MSOP	8Pins	I2C	-40°C	85°C	-	-

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