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

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+ CNY39.610 (CNY44.7593) 25+ CNY36.210 (CNY40.9173) 100+ CNY32.800 (CNY37.064) 300+ CNY32.110 (CNY36.2843) 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 Packaging Options	1+ CNY51.760 (CNY58.4888) 10+ CNY40.320 (CNY45.5616) 25+ CNY36.930 (CNY41.7309) 50+ CNY35.150 (CNY39.7195) 100+ CNY33.680 (CNY38.0584) More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°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+ CNY67.250 (CNY75.9925) 10+ CNY46.660 (CNY52.7258) 46+ CNY43.780 (CNY49.4714) 138+ CNY43.060 (CNY48.6578) 276+ CNY42.340 (CNY47.8442) More Pricing...	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	3V	5.5V	SOIC	16Pins	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+ CNY59.000 (CNY66.670) 10+ CNY45.900 (CNY51.867) 74+ CNY38.360 (CNY43.3468) 148+ CNY38.030 (CNY42.9739) 296+ CNY37.700 (CNY42.601) 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	-	-
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 Packaging Options	5+ CNY5.070 (CNY5.7291) 50+ CNY4.770 (CNY5.3901) 100+ CNY4.470 (CNY5.0511) 500+ CNY4.410 (CNY4.9833) 1000+ CNY4.350 (CNY4.9155)	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 Packaging Options	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+ CNY31.920 (CNY36.0696) 10+ CNY24.230 (CNY27.3799) 25+ CNY22.260 (CNY25.1538) 50+ CNY21.240 (CNY24.0012) 100+ CNY20.210 (CNY22.8373) 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+ CNY34.130 (CNY38.5669) 10+ CNY26.000 (CNY29.380) 25+ CNY23.980 (CNY27.0974) 50+ CNY22.830 (CNY25.7979) 100+ CNY21.680 (CNY24.4984) 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+ CNY157.820 (CNY178.3366) 10+ CNY146.990 (CNY166.0987) 25+ CNY145.380 (CNY164.2794) 50+ CNY141.870 (CNY160.3131) 100+ CNY124.520 (CNY140.7076)	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 Packaging Options	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	-	-
M41T81SMY6F	2806831 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.7V to 5.5V Supply SOIC-18	Each (Supplied on Cut Tape) Cut Tape	1+ CNY37.010 (CNY41.8213) 10+ CNY28.230 (CNY31.8999) 25+ CNY26.000 (CNY29.380) 50+ CNY25.910 (CNY29.2783) 100+ CNY25.820 (CNY29.1766) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	SOIC	18Pins	I2C	-40°C	85°C	-	-
M41T81M6F	3367096 Data Sheet RoHS	STMICROELECTRONICS REAL-TIME CLOCK W/ALARM -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY20.380 (CNY23.0294) 10+ CNY15.270 (CNY17.2551) 25+ CNY13.970 (CNY15.7861) 50+ CNY13.250 (CNY14.9725) 100+ CNY12.530 (CNY14.1589) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
ISL1209IU10Z-TK	3265996 Data Sheet RoHS	RENESAS RTCC -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY32.190 (CNY36.3747) 10+ CNY25.920 (CNY29.2896) 25+ CNY22.330 (CNY25.2329) 50+ CNY20.320 (CNY22.9616) 100+ CNY18.300 (CNY20.679) More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	2.7V	5.5V	MSOP	10Pins	I2C	-40°C	85°C	-	-
MAX31328NELB+	3677599 Data Sheet RoHS	ANALOG DEVICES Real Time Clock Alarm RTC I2C 12Hr / 24Hr 2.3 V to 5.5 V LGA-10 -40 °C to 85 °C	Each	1+ CNY35.570 (CNY40.1941) 10+ CNY27.150 (CNY30.6795) 25+ CNY23.690 (CNY26.7697) 100+ CNY20.310 (CNY22.9503) 490+ CNY19.300 (CNY21.809) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	12Hr / 24Hr	RTC	2.3V	5.5V	LGA	10Pins	I2C, Serial	-40°C	85°C	-	-
RV-3049-C3-TA-QC-OPT.A	2358518 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr) SPI 1.3 V to 5.5 V SON-10	Each	1+ CNY61.940 (CNY69.9922) 10+ CNY48.240 (CNY54.5112) 25+ CNY44.190 (CNY49.9347) 50+ CNY42.060 (CNY47.5278) 100+ CNY40.300 (CNY45.539) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	SPI	-40°C	85°C	-	-
MCP79410-I/MS	1823153 Data Sheet RoHS	MICROCHIP RTC IC Date Time Format (Date/Month/Year hh:mm:ss) I2C Serial 1.8 V to 5.5 V MSOP-8	Each	1+ CNY10.920 (CNY12.3396) 25+ CNY9.560 (CNY10.8028) 100+ CNY8.420 (CNY9.5146)	Min: 1 / Mult: 1	DD:MM:YY	HH:MM:SS	RTC	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	AEC-Q100
RV-2123-C2-TA-QC-020	2358506 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Day/Date/Month/Year/Century 24Hr) SPI 1.1 V to 5.5 V SON-10	Each	1+ CNY50.420 (CNY56.9746) 10+ CNY39.270 (CNY44.3751) 25+ CNY35.970 (CNY40.6461) 50+ CNY34.230 (CNY38.6799) 100+ CNY32.800 (CNY37.064) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	24Hr	RTC	1.1V	5.5V	SON	10Pins	SPI	-40°C	85°C	-	-
DS1302S+T&R	2515449 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Serial 2 V to 5.5 V WSOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY34.780 (CNY39.3014) 10+ CNY25.850 (CNY29.2105) 25+ CNY23.690 (CNY26.7697) 100+ CNY21.600 (CNY24.408) 250+ CNY20.490 (CNY23.1537) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	WSOIC	8Pins	Serial	0°C	70°C	-	-
PCF8563BS/4,118	2400453 Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 1 V to 5.5 V supply HVSON-10	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY10.240 (CNY11.5712) 10+ CNY6.780 (CNY7.6614) 50+ CNY6.390 (CNY7.2207) 100+ CNY6.000 (CNY6.780) 250+ CNY5.650 (CNY6.3845) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1V	5.5V	HVSON	10Pins	I2C	-40°C	85°C	-	-
DS1390U-33+T&R	2515476 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) Cut Tape Packaging Options	1+ CNY38.090 (CNY43.0417) 10+ CNY28.080 (CNY31.7304) 25+ CNY25.130 (CNY28.3969) 100+ CNY22.320 (CNY25.2216) 250+ CNY22.040 (CNY24.9052) 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	-	-
M41T11M6F	2463678 Data Sheet RoHS	STMICROELECTRONICS RTC IC Date Time Format (Date/Month/Year ss:mm:hh) I2C 2 V to 5.5 V SOIC-8	Each (Supplied on Cut Tape) Cut Tape Packaging Options	1+ CNY25.200 (CNY28.476) 10+ CNY19.010 (CNY21.4813) 25+ CNY17.430 (CNY19.6959) 50+ CNY17.330 (CNY19.5829) 100+ CNY17.220 (CNY19.4586) More Pricing...	Min: 1 / Mult: 1	DD:MM:YYYY	ss:mm:hh	RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1308U-33+	2515373 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+ CNY42.200 (CNY47.686) 10+ CNY32.330 (CNY36.5329) 50+ CNY28.160 (CNY31.8208) 100+ CNY26.280 (CNY29.6964) 250+ CNY24.270 (CNY27.4251) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
PCA2129T/Q900/2,51	2427480RL Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C SPI 1.8 V to 4.2 V SOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY27.570 (CNY31.1541) 250+ CNY27.220 (CNY30.7586) 500+ CNY26.870 (CNY30.3631)	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	-	-
DS12887A+	2519011 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Parallel 4.5 V to 5.5 V EDIP-24	Each	1+ CNY89.460 (CNY101.0898) 14+ CNY86.900 (CNY98.197) 28+ CNY84.330 (CNY95.2929) 112+ CNY77.450 (CNY87.5185) 252+ CNY74.230 (CNY83.8799) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	EDIP	24Pins	Parallel	0°C	70°C	-	-

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