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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MCP7940MT-I/SN	2687514 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 SOIC-8	Each (Supplied on Full Reel) Full Reel Packaging Options	3300+ CNY4.410 (CNY4.9833) 9900+ CNY4.340 (CNY4.9042)	Min: 3300 / Mult: 3300	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	SOIC	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+ CNY62.370 (CNY70.4781) 10+ CNY49.710 (CNY56.1723) 25+ CNY48.830 (CNY55.1779) 50+ CNY47.950 (CNY54.1835) 100+ CNY47.070 (CNY53.1891) 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	-	-
ISL1209IU10Z-TK	3265996 Data Sheet RoHS	RENESAS RTCC -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY39.580 (CNY44.7254) 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	-	-
M41T81M6F	3367096 Data Sheet RoHS	STMICROELECTRONICS REAL-TIME CLOCK W/ALARM -40 TO 85DEG C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY22.560 (CNY25.4928) 10+ CNY16.890 (CNY19.0857) 25+ CNY15.470 (CNY17.4811) 50+ CNY14.720 (CNY16.6336) 100+ CNY13.970 (CNY15.7861) 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	-	-
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+ CNY36.170 (CNY40.8721) 10+ CNY27.540 (CNY31.1202) 25+ CNY25.390 (CNY28.6907) 100+ CNY23.020 (CNY26.0126) 490+ CNY21.230 (CNY23.9899) 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	-	-
DP8573AV/NOPB	2492605 RoHS	TEXAS INSTRUMENTS RTC IC Date Time Format (BCD 12Hr / 24Hr) Parallel 4.5 V to 5.5 V LCC-28	Each	1+ CNY140.470 (CNY158.7311) 10+ CNY129.560 (CNY146.4028) 25+ CNY123.740 (CNY139.8262) 50+ CNY117.210 (CNY132.4473) 100+ CNY111.930 (CNY126.4809)	Min: 1 / Mult: 1	BCD	12Hr / 24Hr	RTC	4.5V	5.5V	LCC	28Pins	Parallel	-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+ CNY60.940 (CNY68.8622) 10+ CNY48.800 (CNY55.144) 25+ CNY45.290 (CNY51.1777) 50+ CNY43.230 (CNY48.8499) 100+ CNY41.410 (CNY46.7933) 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
DS1374U-3+	2515389 Data Sheet RoHS	ANALOG DEVICES Binary Counter IC Date Time Format (Binary) I2C 2.7 V to 3.3 V µSOP-10	Each	1+ CNY43.850 (CNY49.5505) 10+ CNY33.600 (CNY37.968) 50+ CNY29.500 (CNY33.335) 100+ CNY28.230 (CNY31.8999) 250+ CNY26.890 (CNY30.3857) More Pricing...	Min: 1 / Mult: 1	Binary	Binary	Binary Counter	2.7V	3.3V	µSOP	10Pins	I2C	-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	1+ CNY35.500 (CNY40.115) 10+ CNY27.030 (CNY30.5439) 25+ CNY24.910 (CNY28.1483) 100+ CNY22.580 (CNY25.5154) 250+ CNY21.470 (CNY24.2611) 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	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	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: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	1+ CNY23.790 (CNY26.8827) 10+ CNY17.940 (CNY20.2722) 25+ CNY17.750 (CNY20.0575) 50+ CNY17.560 (CNY19.8428) 100+ CNY17.360 (CNY19.6168) 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+ CNY42.890 (CNY48.4657) 10+ CNY32.840 (CNY37.1092) 50+ CNY28.820 (CNY32.5666) 100+ CNY27.580 (CNY31.1654) 250+ CNY26.260 (CNY29.6738) 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+ CNY118.640 (CNY134.0632) 14+ CNY91.600 (CNY103.508) 28+ CNY87.240 (CNY98.5812) 112+ CNY80.700 (CNY91.191) 252+ CNY77.900 (CNY88.027) 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	-	-
DS2417P+	2515489 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Binary) Serial 2.5 V to 5.5 V TSOC-6	Each	1+ CNY25.110 (CNY28.3743) 10+ CNY18.960 (CNY21.4248) 25+ CNY17.430 (CNY19.6959) 120+ CNY15.580 (CNY17.6054) 360+ CNY14.730 (CNY16.6449) More Pricing...	Min: 1 / Mult: 1	Binary	Binary	RTC	2.5V	5.5V	TSOC	6Pins	Serial	-40°C	85°C	-	-
X1B0002420001	2445807 Data Sheet RoHS	EPSON RTC IC Calendar 1.6 V to 5.5 V SOP 8Pins I2C	Each (Supplied on Cut Tape) Cut Tape	1+ CNY18.510 (CNY20.9163) 10+ CNY18.230 (CNY20.5999) 25+ CNY17.940 (CNY20.2722) 50+ CNY17.660 (CNY19.9558) 100+ CNY17.370 (CNY19.6281) More Pricing...	Min: 1 / Mult: 1	-	-	Alarm RTC	1.6V	5.5V	SOP	8Pins	I2C	-40°C	85°C	-	-
M41T94MH6F	2806842 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) SPI 2.7V to 5.5V Supply SOH-28	Each (Supplied on Cut Tape) Cut Tape	1+ CNY82.210 (CNY92.8973) 10+ CNY64.420 (CNY72.7946) 25+ CNY59.960 (CNY67.7548) 50+ CNY57.510 (CNY64.9863) 100+ CNY55.050 (CNY62.2065) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	SOH	28Pins	SPI	-40°C	85°C	-	-
DS1308U-3+	2798725 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 supply µSOP-8	Each	1+ CNY41.440 (CNY46.8272) 10+ CNY31.770 (CNY35.9001) 50+ CNY27.750 (CNY31.3575) 100+ CNY26.580 (CNY30.0354) 250+ CNY25.680 (CNY29.0184) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.7V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
MCP7940MT-I/SN	2901506 Data Sheet RoHS	MICROCHIP RTC Alarm RTC Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.8V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY5.020 (CNY5.6726) 25+ CNY5.010 (CNY5.6613) 100+ CNY5.000 (CNY5.650)	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCF8563TS/5,118	2775932 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) Cut Tape	1+ CNY8.070 (CNY9.1191) 10+ CNY6.200 (CNY7.006) 50+ CNY5.880 (CNY6.6444) 100+ CNY5.560 (CNY6.2828) 250+ CNY5.220 (CNY5.8986) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
PCF2127T/2Y	2775934 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-16	Each (Supplied on Cut Tape) Cut Tape	1+ CNY29.800 (CNY33.674) 10+ CNY24.580 (CNY27.7754) 25+ CNY23.080 (CNY26.0804) 50+ CNY22.530 (CNY25.4589) 100+ CNY21.970 (CNY24.8261) More Pricing...	Min: 1 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.8V	4.2V	SOIC	16Pins	I2C, SPI	-40°C	85°C	-	-
M41T93ZMY6F	3129790 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) SPI 2.38V 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	RTC	2.38V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-
M48T37V-10MH1F	3129609 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Parallel 3V to 3.6V Supply SOIC-44	Each (Supplied on Cut Tape) Cut Tape	1+ CNY172.760 (CNY195.2188) 10+ CNY138.650 (CNY156.6745) 25+ CNY130.150 (CNY147.0695) 50+ CNY126.670 (CNY143.1371) 100+ CNY123.190 (CNY139.2047)	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	3V	3.6V	SOIC	44Pins	Parallel	0°C	70°C	-	-

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