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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			Price For		Quantity

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+ HK$11.980 10+ HK$8.720 50+ HK$7.900 100+ HK$7.000 250+ HK$6.570 More Pricing...	Total:HK$11.98 Min: 1 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	1.1V	5.5V	HVQFN	HVQFN	I2C	16Pins	-	-	-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+ HK$9.140 50+ HK$6.340 100+ HK$5.670 500+ HK$5.090 1000+ HK$4.920	Total:HK$45.70 Min: 5 / Mult: 5	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-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+ HK$23.350 10+ HK$17.450 25+ HK$15.910 50+ HK$15.100 100+ HK$14.280 More Pricing...	Total:HK$23.35 Min: 1 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	1.4V	3.6V	MSOP	MSOP	I2C	8Pins	-	-	-40°C	85°C	-
PCF85063TP/1Z	2427483RL Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HWSON-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ HK$2.990	Total:HK$299.00 Min: 100 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	HWSON	HWSON	I2C	8Pins	-	-	-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+ HK$10.750 10+ HK$7.790 50+ HK$7.060 100+ HK$6.250 250+ HK$5.860 More Pricing...	Total:HK$10.75 Min: 1 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	1V	5.5V	TSSOP	TSSOP	I2C	8Pins	-	-	-40°C	85°C	-
ISL12057IBZ-T	2983743 Data Sheet RoHS	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 1.4V to 3.6V Supply NSOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ HK$16.880	Total:HK$16.88 Min: 1 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	1.4V	3.6V	NSOIC	NSOIC	I2C	8Pins	-	-	-40°C	85°C	-
PCF85363ATL/AX	2890044 Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C 900 mV to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW DFN2626-10	Each (Supplied on Cut Tape) Cut Tape	1+ HK$11.660 10+ HK$8.480 50+ HK$7.690 100+ HK$6.820 250+ HK$6.400 More Pricing...	Total:HK$11.66 Min: 1 / Mult: 1	I2C	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	900mV	5.5V	DFN2626	DFN2626	I2C	10Pins	-	-	-40°C	85°C	-
PCA2131TF/Q900Y	3874832RL Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$19.710 250+ HK$18.700 500+ HK$18.090 1000+ HK$17.580	Total:HK$1,971.00 Min: 100 / Mult: 1	I2C, SPI	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	1.2V	5.5V	HLSON	HLSON	I2C, SPI	16Pins	-	AEC-Q100	-40°C	105°C	AEC-Q100
PCF2131TFY	3874833RL Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$17.390 250+ HK$16.460 500+ HK$15.900 1000+ HK$15.440	Total:HK$1,739.00 Min: 100 / Mult: 1	I2C, SPI	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	1.2V	5.5V	HLSON	HLSON	I2C, SPI	16Pins	-	AEC-Q100	-40°C	85°C	AEC-Q100
PCF2131TFY	3874833 Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Cut Tape	1+ HK$28.150 10+ HK$21.090 25+ HK$19.320 50+ HK$18.360 100+ HK$17.390 More Pricing...	Total:HK$28.15 Min: 1 / Mult: 1	I2C, SPI	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	1.2V	5.5V	HLSON	HLSON	I2C, SPI	16Pins	-	AEC-Q100	-40°C	85°C	AEC-Q100
PCA2131TF/Q900Y	3874832 Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C SPI 1.2 V to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW HLSON-16	Each (Supplied on Cut Tape) Cut Tape	1+ HK$31.450 10+ HK$23.770 25+ HK$21.840 50+ HK$20.780 100+ HK$19.710 More Pricing...	Total:HK$31.45 Min: 1 / Mult: 1	I2C, SPI	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	1.2V	5.5V	HLSON	HLSON	I2C, SPI	16Pins	-	AEC-Q100	-40°C	105°C	AEC-Q100
PCF2129AT/2,518	2400450RL 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-20	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$29.070 250+ HK$27.790 500+ HK$27.020	Total:HK$2,907.00 Min: 100 / Mult: 1	I2C, SPI	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	1.8V	4.2V	SOIC	SOIC	I2C, SPI	20Pins	-	-	-40°C	85°C	-
PCA85073ADP/Q900Z	3378955 Data Sheet RoHS	NXP RTC/Calendar HH:MM:SS YYYY-MM-DD I2C 900mV to 5.5V -40°C to 105°C TSSOP-8	Each (Supplied on Cut Tape) Cut Tape	1+ HK$11.650 10+ HK$8.460 50+ HK$7.680 100+ HK$6.800 250+ HK$6.390 More Pricing...	Total:HK$11.65 Min: 1 / Mult: 1	I2C	HH:MM:SS	YYYY-MM-DD	RTCC	HH:MM:SS	900mV	5.5V	TSSOP	TSSOP	I2C	8Pins	-	AEC-Q100	-40°C	105°C	AEC-Q100
PCF85063ATL/1,118	2427481 Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HXSON-10	Each (Supplied on Cut Tape) Cut Tape	1+ HK$6.000 10+ HK$4.280 100+ HK$3.360 500+ HK$3.000 1000+ HK$2.890 More Pricing...	Total:HK$6.00 Min: 1 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	HXSON	HXSON	I2C	10Pins	-	-	-40°C	85°C	-
PCF8593T/1,118	2775931 Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 2.5 V to 6 V supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ HK$32.970 10+ HK$24.850 25+ HK$22.820 50+ HK$21.700 100+ HK$20.580 More Pricing...	Total:HK$32.97 Min: 1 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	2.5V	6V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
M41T82SM6F	2806833 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 3V to 5.5V Supply SOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ HK$26.090 10+ HK$19.590 25+ HK$17.870 50+ HK$16.980 100+ HK$16.080 More Pricing...	Total:HK$26.09 Min: 1 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	3V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
M41ST87WMX6TR	2806826 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 3V to 3.6V Supply SOIC-28	Each (Supplied on Cut Tape) Cut Tape	1+ HK$81.140 10+ HK$63.180 25+ HK$58.740 50+ HK$57.580 100+ HK$56.410 More Pricing...	Total:HK$81.14 Min: 1 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	3V	3.6V	SOIC	SOIC	I2C	28Pins	-	-	-40°C	85°C	-
PCF85063ATL/1,118	2427481RL Data Sheet RoHS	NXP Calendar Clock IC Year/Month/Week/Date/Hr/Min/Sec Binary I2C 900 mV to 5.5 V HXSON-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$3.360 500+ HK$3.000 1000+ HK$2.890 2500+ HK$2.820 5000+ HK$2.750	Total:HK$336.00 Min: 100 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	HXSON	HXSON	I2C	10Pins	-	-	-40°C	85°C	-
RV-8523-C3-TA-QC-020	2358523 Data Sheet RoHS	MICRO CRYSTAL RTC IC Date Time Format (Day/Date/Month/Year/Century 24Hr) I2C 1.2 V to 5.5 V SON-10	Each	1+ HK$66.160 10+ HK$52.930 25+ HK$49.520 50+ HK$47.830 100+ HK$45.960 More Pricing...	Total:HK$66.16 Min: 1 / Mult: 1	I2C	24Hr	Day; Date; Month; Year; Century	RTC	24Hr	1.2V	5.5V	SON	SON	I2C	10Pins	-	-	-40°C	85°C	-
M41T00SM6F	2463681RL Data Sheet RoHS	STMICROELECTRONICS RTC IC Date Time Format (Date/Month/Year ss:mm:hh) I2C 2.7 V to 5.5 V supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$16.360 500+ HK$14.280 1000+ HK$13.830	Total:HK$1,636.00 Min: 100 / Mult: 5	I2C	ss:mm:hh	DD:MM:YYYY	RTC	ss:mm:hh	2.7V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
ISL12022MIBZ-T	2113277 Data Sheet RoHS	RENESAS RTC Date Time Format (YY/MM/DD/dd HH:MM:SS) I2C 2.7V to 5.5V Supply SOIC-20	Each (Supplied on Cut Tape) Cut Tape	1+ HK$61.820 10+ HK$47.710 25+ HK$44.200 50+ HK$42.540 100+ HK$40.880 More Pricing...	Total:HK$61.82 Min: 1 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTC	HH:MM:SS	2.7V	5.5V	SOIC	SOIC	I2C	20Pins	-	-	-40°C	85°C	-
PCF85263ATL/AX	2775935RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply DFN2626-10	Each (Supplied on Cut Tape) Re-Reel Packaging Options	50+ HK$5.710 250+ HK$5.090 1000+ HK$4.720 2000+ HK$4.630	Total:HK$571.00 Min: 100 / Mult: 5	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	DFN2626	DFN2626	I2C	10Pins	-	-	-40°C	85°C	-
PCF8563T/F4,118	2841031RL Data Sheet RoHS	NXP RTC Date Time Format (DD:MM:YY HH:MM:SS Century Flag) 400 kbit/s I2C 1.8V to 5.5V SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$7.590 250+ HK$7.130 500+ HK$6.860 1000+ HK$6.660 2500+ HK$6.460	Total:HK$759.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	DD:MM:YY	Alarm RTC	HH:MM:SS	1.8V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
PCF85063AT/AAZ	2890042RL Data Sheet RoHS	NXP Real Time Clock/Calendar IC I2C 900 mV to 5.5 V HH:MM:SS: 12Hr / 24Hr YY-MM-DD-DW SOIC 8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$3.570 500+ HK$3.550 1000+ HK$3.520 2500+ HK$3.500 5000+ HK$3.470	Total:HK$357.00 Min: 100 / Mult: 1	I2C	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	900mV	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
PCF8593T/1,118	2775931RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 2.5 V to 6 V supply SOIC-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$20.580 250+ HK$19.520 500+ HK$18.870 1000+ HK$18.340	Total:HK$2,058.00 Min: 100 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	2.5V	6V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-