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

PCF2123BS/1,518	2775940RL 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) Re-Reel Packaging Options	100+ CNY5.780 (CNY6.5314) 250+ CNY5.420 (CNY6.1246) 500+ CNY5.210 (CNY5.8873) 1000+ CNY5.130 (CNY5.7969) 2500+ CNY5.040 (CNY5.6952)	Min: 100 / Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.1V	5.5V	HVQFN	16Pins	I2C	-40°C	85°C	-	-
PCF85263AT/AJ	2775933RL 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) Re-Reel Packaging Options	100+ CNY4.470 (CNY5.0511) 500+ CNY4.410 (CNY4.9833) 1000+ CNY4.370 (CNY4.9381)	Min: 100 / Mult: 5	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	900mV	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1685SN-3+	2909720 Data Sheet RoHS	ANALOG DEVICES RTC Alarm Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Parallel 3.3V WSOIC-24	Each	1+ CNY69.930 (CNY79.0209) 10+ CNY63.130 (CNY71.3369) 30+ CNY58.650 (CNY66.2745) 120+ CNY56.180 (CNY63.4834) 270+ CNY54.950 (CNY62.0935) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Alarm RTC	2.7V	3.7V	WSOIC	24Pins	Parallel	0°C	70°C	-	-
ISL1208IB8Z-TK	2983745 Data Sheet RoHS	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 2.7V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY30.250 (CNY34.1825) 10+ CNY19.790 (CNY22.3627) 25+ CNY16.960 (CNY19.1648) 50+ CNY15.360 (CNY17.3568) 100+ CNY13.740 (CNY15.5262) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.7V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1307ZN+T&R	2798724RL Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 4.5 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY23.500 (CNY26.555) 250+ CNY22.040 (CNY24.9052) 500+ CNY21.450 (CNY24.2385) 1000+ CNY21.090 (CNY23.8317)	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231S#T&R	2798759RL Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V supply SOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY63.720 (CNY72.0036) 25+ CNY59.330 (CNY67.0429) 100+ CNY54.440 (CNY61.5172) 250+ CNY52.130 (CNY58.9069) 500+ CNY50.760 (CNY57.3588) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	5.5V	SOIC	16Pins	I2C	0°C	70°C	-	-
DS1391U-33+T&R	2515477RL Data Sheet RoHS	ANALOG DEVICES RTC Day/Date/Month/Year HH:MM:SS:hh Alarm RTC SPI 2.97 V to 5.5 V Supply µSOP-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY24.530 (CNY27.7189) 250+ CNY22.990 (CNY25.9787) 500+ CNY22.040 (CNY24.9052) 1000+ CNY21.600 (CNY24.408)	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	-	-
M41ST85WMX6TR	2806825RL Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.7V to 3.6V Supply SOIC-28	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY46.220 (CNY52.2286)	Min: 10 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-
PCF8563TS/5,118	2775932RL 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+ CNY6.350 (CNY7.1755) 250+ CNY6.080 (CNY6.8704) 500+ CNY5.820 (CNY6.5766) 1000+ CNY5.550 (CNY6.2715) 2500+ CNY5.290 (CNY5.9777)	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-
DS1341U+T&R	2515467RL Data Sheet RoHS	ANALOG DEVICES RTC Day/Date/Month/Year HH:MM:SS Alarm RTC I2C 1.8 V to 5.5 V Supply µSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY18.010 (CNY20.3513) 250+ CNY16.840 (CNY19.0292) 500+ CNY15.520 (CNY17.5376) 3000+ CNY14.860 (CNY16.7918)	Min: 100 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
M41T82RM6F	2806832 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-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY44.660 (CNY50.4658) 10+ CNY31.590 (CNY35.6967) 25+ CNY29.430 (CNY33.2559) 50+ CNY27.640 (CNY31.2332) 100+ CNY25.840 (CNY29.1992) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
MCP79410T-I/MNY	2851649RL 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) Re-Reel Packaging Options	1+ CNY8.530 (CNY9.6389)	Min: 100 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-
MCP7940NT-I/MNY	2851655RL 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) Re-Reel Packaging Options	100+ CNY8.570 (CNY9.6841) 3300+ CNY7.690 (CNY8.6897)	Min: 100 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-
M41T82RM6F	2806832RL 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-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY25.840 (CNY29.1992) 250+ CNY24.580 (CNY27.7754) 500+ CNY22.040 (CNY24.9052) 1000+ CNY18.600 (CNY21.018)	Min: 100 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS3231SN#T&R	2798760RL Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) I2C 2.3 V to 5.5 V supply SOIC-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY73.860 (CNY83.4618) 25+ CNY68.890 (CNY77.8457) 100+ CNY63.400 (CNY71.642) 250+ CNY60.760 (CNY68.6588) 500+ CNY59.150 (CNY66.8395) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
DS12885S+T&R	2798720RL 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) Re-Reel Packaging Options	10+ CNY65.300 (CNY73.789) 25+ CNY60.250 (CNY68.0825) 100+ CNY54.610 (CNY61.7093) 250+ CNY52.420 (CNY59.2346) 500+ CNY51.460 (CNY58.1498) More Pricing...	Min: 10 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	SOIC	24Pins	Bytewide	0°C	70°C	-	-
DS1744WP-120+	2798735 Data Sheet RoHS	ANALOG DEVICES RTC IC Date Time Format (Day/Date/Month/Year hh:mm:ss) Bytewide 3 V to 3.6 V supply PWRCP-34	Each	1+ CNY248.140 (CNY280.3982) 10+ CNY247.890 (CNY280.1157) 40+ CNY247.770 (CNY279.9801) 120+ CNY247.640 (CNY279.8332) 280+ CNY247.520 (CNY279.6976)	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	3V	3.6V	PWRCP	34Pins	Bytewide	0°C	70°C	-	-
DS1685SN-5+	2798734 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 TSSOP-24	Each	1+ CNY80.740 (CNY91.2362) 10+ CNY57.910 (CNY65.4383) 30+ CNY51.170 (CNY57.8221) 120+ CNY51.100 (CNY57.743) 270+ CNY50.340 (CNY56.8842) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	4.5V	5.5V	TSSOP	24Pins	Bytewide	-40°C	85°C	-	-
PCF2127T/2Y	2775934RL 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) Re-Reel Packaging Options	100+ CNY22.380 (CNY25.2894) 250+ CNY22.230 (CNY25.1199) 500+ CNY22.070 (CNY24.9391) 1000+ CNY21.900 (CNY24.747)	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	-	-
DS3232MZ+TRL	2987323 Data Sheet RoHS	ANALOG DEVICES RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) I2C 2.3V to 4.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ CNY79.060 (CNY89.3378) 10+ CNY59.370 (CNY67.0881) 25+ CNY53.370 (CNY60.3081) 100+ CNY50.290 (CNY56.8277) 250+ CNY48.390 (CNY54.6807) More Pricing...	Min: 1 / Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.3V	4.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
M41T93ZMY6F	3129790RL 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) Re-Reel Packaging Options	1+ CNY46.010 (CNY51.9913)	Min: 100 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	2.38V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-
DS1337C#T&R	3404543 Data Sheet RoHS	ANALOG DEVICES RTCC -40 TO 85DEG C WSOIC	Each (Supplied on Cut Tape) Cut Tape	1+ CNY53.950 (CNY60.9635) 10+ CNY41.730 (CNY47.1549) 25+ CNY38.580 (CNY43.5954) 100+ CNY34.340 (CNY38.8042) 250+ CNY32.290 (CNY36.4877) More Pricing...	Min: 1 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTCC	1.8V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-
DS1338C-33#T&R	3404544RL Data Sheet RoHS	ANALOG DEVICES RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY50.120 (CNY56.6356) 25+ CNY43.640 (CNY49.3132) 100+ CNY38.090 (CNY43.0417) 250+ CNY37.420 (CNY42.2846) 500+ CNY36.740 (CNY41.5162) More Pricing...	Min: 10 / Mult: 1	YY-MM-DD	HH:MM:SS	RTC	3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-
M41T81M6F	3367096RL Data Sheet RoHS	STMICROELECTRONICS REAL-TIME CLOCK W/ALARM -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ CNY13.000 (CNY14.690) 250+ CNY12.330 (CNY13.9329) 500+ CNY12.180 (CNY13.7634) 1000+ CNY12.030 (CNY13.5939)	Min: 100 / Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
X1B0003010001	3253613RL Data Sheet RoHS	EPSON RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ CNY32.670 (CNY36.9171)	Min: 10 / Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	1.6V	5.5V	-	10Pins	I2C	-40°C	85°C	-	-

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