Real Time Clocks | e絡盟 Hong Kong

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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M41T93ZQA6F	3132494RL Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Serial SPI 2.38V to 5.5V QFN-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ HK$45.830 25+ HK$42.420 50+ HK$41.620 100+ HK$40.810 250+ HK$40.000 More Pricing...	Total:HK$458.30 Min: 10 / Mult: 1	Serial, SPI	HH:MM:SS	Day; Date; Month; Year; Century	RTC	HH:MM:SS	2.38V	5.5V	QFN	QFN	Serial, SPI	16Pins	-	-	-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+ HK$14.760 250+ HK$14.010 500+ HK$13.510 1000+ HK$13.170	Total:HK$1,476.00 Min: 100 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	2V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
X1B0003010001	3253613RL Data Sheet RoHS	EPSON RTC -40 TO 85DEG C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$38.880 250+ HK$38.050 500+ HK$37.200	Total:HK$3,888.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTC	HH:MM:SS	1.6V	5.5V	-	-	I2C	10Pins	-	-	-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	10+ HK$62.070 25+ HK$57.630 50+ HK$56.480 100+ HK$55.330 250+ HK$54.180	Total:HK$620.70 Min: 10 / Mult: 1	SPI	HH:MM:SS	Day; Date; Month; Year; Century	RTC	HH:MM:SS	2.38V	5.5V	SOIC	SOIC	SPI	18Pins	-	-	-40°C	85°C	-
M41T93ZQA6F	3132494 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS) Serial SPI 2.38V to 5.5V QFN-16	Each (Supplied on Cut Tape) Cut Tape	1+ HK$59.510 10+ HK$45.830 25+ HK$42.420 50+ HK$41.620 100+ HK$40.810 More Pricing...	Total:HK$59.51 Min: 1 / Mult: 1	Serial, SPI	HH:MM:SS	Day; Date; Month; Year; Century	RTC	HH:MM:SS	2.38V	5.5V	QFN	QFN	Serial, SPI	16Pins	-	-	-40°C	85°C	-
1339-31DVGI8	3869497RL Data Sheet RoHS	RENESAS Real Time Clock IC MSOP-8 I2C 12Hr / 24Hr 5.5V Supply -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$15.440 250+ HK$14.630 500+ HK$14.150 1000+ HK$13.740	Total:HK$1,544.00 Min: 100 / Mult: 1	I2C	HH:MM:SS: 12Hr / 24Hr	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS: 12Hr / 24Hr	3.3V	5.5V	TSSOP	TSSOP	I2C	8Pins	-	-	-40°C	85°C	-
AB0805-T3	3819894 Data Sheet RoHS	ABRACON Real Time Clock RTC I2C 1.5 V to 3.6 V HH:MM:SS:hh Day; Date; Month; Year; Century QFN	Each (Supplied on Full Reel) Full Reel Packaging Options	3000+ HK$10.060 9000+ HK$9.110	Total:HK$30,180.00 Min: 3000 / Mult: 3000	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN	QFN	I2C	16Pins	-	-	-40°C	85°C	-
AB0815-T3	3819666RL Data Sheet RoHS	ABRACON Real Time Clock HH:MM:SS:hh YY-MM-DD-dd I2C/SPI QFN-EP-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$10.780 500+ HK$10.570 1500+ HK$10.350	Total:HK$1,078.00 Min: 100 / Mult: 5	SPI	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN-EP	QFN-EP	SPI	16Pins	-	-	-40°C	85°C	-
AB-RTCMC-32.768KHZ-B5ZE-S3-T	3819764 Data Sheet RoHS	ABRACON Real-Time Clock/Calendar IC I2C HH:MM:SS YY-MM-DD-dd -40 °C to 85 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$57.110 10+ HK$42.240 50+ HK$40.270 200+ HK$36.080 500+ HK$34.290	Total:HK$57.11 Min: 1 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTC	HH:MM:SS	1.2V	5.5V	CLCC	CLCC	I2C	8Pins	-	-	-40°C	85°C	-
AB1815-T3	3819669RL Data Sheet RoHS	ABRACON Real Time Clock HH:MM:SS:hh YY-MM-DD-dd I2C/SPI QFN-EP-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$10.580 500+ HK$9.300	Total:HK$1,058.00 Min: 100 / Mult: 5	SPI	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN-EP	QFN-EP	SPI	16Pins	-	-	-40°C	85°C	-
1339-31DVGI8	3869497 Data Sheet RoHS	RENESAS Real Time Clock IC MSOP-8 I2C 12Hr / 24Hr 5.5V Supply -40 °C to 85 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$24.940 10+ HK$18.690 25+ HK$16.740 50+ HK$16.100 100+ HK$15.440 More Pricing...	Total:HK$24.94 Min: 1 / Mult: 1	I2C	HH:MM:SS: 12Hr / 24Hr	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS: 12Hr / 24Hr	3.3V	5.5V	TSSOP	TSSOP	I2C	8Pins	-	-	-40°C	85°C	-
AB1815-T3	3820756 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+ HK$9.300	Total:HK$27,900.00 Min: 3000 / Mult: 3000	SPI	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN-EP	QFN-EP	SPI	16Pins	-	-	-40°C	85°C	-
AB-RTCMC-32.768KHZ-AIGZ-S7-T	3819763 Data Sheet RoHS	ABRACON Real-Time Clock/Calendar IC I2C HH:MM:SS:hh YY-MM-DD-dd -40 °C to 85 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$36.770 10+ HK$34.670 50+ HK$32.560 200+ HK$30.450 500+ HK$28.380	Total:HK$36.77 Min: 1 / Mult: 1	I2C	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.3V	4.4V	CLCC	CLCC	I2C	8Pins	-	-	-40°C	85°C	-
AB0815-T3	3819666 Data Sheet RoHS	ABRACON Real Time Clock HH:MM:SS:hh YY-MM-DD-dd I2C/SPI QFN-EP-16	Each (Supplied on Cut Tape) Cut Tape	5+ HK$16.340 50+ HK$11.040 100+ HK$10.780 500+ HK$10.570 1500+ HK$10.350	Total:HK$81.70 Min: 5 / Mult: 5	SPI	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN-EP	QFN-EP	SPI	16Pins	-	-	-40°C	85°C	-
AB-RTCMC-32.768KHZ-B5ZE-S3-T	3819764RL Data Sheet RoHS	ABRACON Real-Time Clock/Calendar IC I2C HH:MM:SS YY-MM-DD-dd -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	50+ HK$40.270 200+ HK$36.080 500+ HK$34.290	Total:HK$4,027.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTC	HH:MM:SS	1.2V	5.5V	CLCC	CLCC	I2C	8Pins	-	-	-40°C	85°C	-
AB1815-T3	3819669 Data Sheet RoHS	ABRACON Real Time Clock HH:MM:SS:hh YY-MM-DD-dd I2C/SPI QFN-EP-16	Each (Supplied on Cut Tape) Cut Tape	5+ HK$17.010 50+ HK$11.720 100+ HK$10.580 500+ HK$9.300	Total:HK$85.05 Min: 5 / Mult: 5	SPI	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN-EP	QFN-EP	SPI	16Pins	-	-	-40°C	85°C	-
ISL1208IU8Z-TK	3869498RL Data Sheet RoHS	RENESAS Real Time Clock/Calendar IC I2C 2.7 V to 5.5 V HH:MM:SS MSOP-8 -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$18.310 250+ HK$17.970 500+ HK$17.620 1000+ HK$17.260	Total:HK$1,831.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	2.7V	5.5V	MSOP	MSOP	I2C	8Pins	-	-	-40°C	85°C	-
AB-RTCMC-32.768KHZ-AIGZ-S7-T	3819763RL Data Sheet RoHS	ABRACON Real-Time Clock/Calendar IC I2C HH:MM:SS:hh YY-MM-DD-dd -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	50+ HK$32.560 200+ HK$30.450 500+ HK$28.380	Total:HK$3,256.00 Min: 100 / Mult: 1	I2C	HH:MM:SS:hh	YY-MM-DD-dd	RTC	HH:MM:SS:hh	1.3V	4.4V	CLCC	CLCC	I2C	8Pins	-	-	-40°C	85°C	-
AB1805-T3	3819895 Data Sheet RoHS	ABRACON Real Time Clock RTC I2C 1.5 V to 3.6 V HH:MM:SS:hh Day; Date; Month; Year; Century QFN	Each (Supplied on Full Reel) Full Reel Packaging Options	3000+ HK$10.530 9000+ HK$10.350	Total:HK$31,590.00 Min: 3000 / Mult: 3000	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	RTC	HH:MM:SS:hh	1.5V	3.6V	QFN	QFN	I2C	16Pins	-	-	-40°C	85°C	-
M41T01M6F	4036041 Data Sheet RoHS	STMICROELECTRONICS Real Time Clock/Calendar 2 V to 5.5 V HH:MM:SS dd; DD; MM; YY; Century SOIC-8 -40 °C to 85 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$27.220 10+ HK$18.770 50+ HK$17.840 100+ HK$16.910 250+ HK$16.010 More Pricing...	Total:HK$27.22 Min: 1 / Mult: 1	Serial	HH:MM:SS	Day; Date; Month; Year; Century	Calendar, Clock	HH:MM:SS	2V	5.5V	SOIC	SOIC	Serial	8Pins	-	-	-40°C	85°C	-
M41T01M6F	4036041RL Data Sheet RoHS	STMICROELECTRONICS Real Time Clock/Calendar 2 V to 5.5 V HH:MM:SS dd; DD; MM; YY; Century SOIC-8 -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$16.910 250+ HK$16.010 500+ HK$15.530 1000+ HK$15.030 2500+ HK$14.150	Total:HK$1,691.00 Min: 100 / Mult: 1	Serial	HH:MM:SS	Day; Date; Month; Year; Century	Calendar, Clock	HH:MM:SS	2V	5.5V	SOIC	SOIC	Serial	8Pins	-	-	-40°C	85°C	-
X1B0004810001	4071656RL Data Sheet RoHS	EPSON Real-Time Clock IC YY-MM-DD-DW I2C 1.6 V to 5.5 V -40 °C to 105 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$35.930 250+ HK$35.370 500+ HK$34.860	Total:HK$3,593.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-DW	Alarm RTC	HH:MM:SS	1.6V	5.5V	Module	Module	I2C	10Pins	-	-	-40°C	105°C	-
ECS-RTC-3225-5699HS-TR	4059431RL Data Sheet RoHS	ECS INC INTERNATIONAL Real-Time Clock/Calendar I2C 2.5 V to 5 V HH:MM:SS YY-MM-DD TModule-10 -40 °C to 85 °C	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ HK$40.110 25+ HK$34.800 50+ HK$31.810 100+ HK$28.820 250+ HK$27.880 More Pricing...	Total:HK$401.10 Min: 10 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD	Calendar, Clock	HH:MM:SS	2.5V	5V	Module	Module	I2C	10Pins	-	-	-40°C	85°C	-
ECS-RTC-3225-5699HS-TR	4059431 Data Sheet RoHS	ECS INC INTERNATIONAL Real-Time Clock/Calendar I2C 2.5 V to 5 V HH:MM:SS YY-MM-DD TModule-10 -40 °C to 85 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$60.280 10+ HK$40.110 25+ HK$34.800 50+ HK$31.810 100+ HK$28.820 More Pricing...	Total:HK$60.28 Min: 1 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD	Calendar, Clock	HH:MM:SS	2.5V	5V	Module	Module	I2C	10Pins	-	-	-40°C	85°C	-
X1B0004810001	4071656 Data Sheet RoHS	EPSON Real-Time Clock IC YY-MM-DD-DW I2C 1.6 V to 5.5 V -40 °C to 105 °C	Each (Supplied on Cut Tape) Cut Tape	1+ HK$49.170 10+ HK$37.620 25+ HK$37.060 50+ HK$36.500 100+ HK$35.930 More Pricing...	Total:HK$49.17 Min: 1 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-DW	Alarm RTC	HH:MM:SS	1.6V	5.5V	Module	Module	I2C	10Pins	-	-	-40°C	105°C	-