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.

No Filter(s) Applied

0 Filter(s) Selected

			Price For		Quantity

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+ HK$6.000 250+ HK$5.630 500+ HK$5.620 1000+ HK$5.610 2500+ HK$5.610	Total:HK$600.00 Min: 100 / 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	-
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+ HK$6.070 500+ HK$5.450 1000+ HK$4.870	Total:HK$607.00 Min: 100 / 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	-
MCP7940NT-I/SN	2857529RL Data Sheet RoHS	MICROCHIP 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) Re-Reel Packaging Options	100+ HK$6.680 3300+ HK$6.640	Total:HK$668.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	RTC	HH:MM:SS	1.8V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-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+ HK$63.270 25+ HK$58.740 50+ HK$57.300 100+ HK$55.860 250+ HK$54.420	Total:HK$632.70 Min: 10 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	2.7V	3.6V	SOIC	SOIC	I2C	28Pins	-	-	-40°C	85°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+ HK$24.120 10+ HK$18.050 25+ HK$16.510 50+ HK$15.660 100+ HK$14.800 More Pricing...	Total:HK$24.12 Min: 1 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	2.7V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
M41T83ZMY6F	2806838 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.38V to 5.5V SOIC-18	Each	1+ HK$56.680 10+ HK$43.610 25+ HK$40.360 50+ HK$38.570 100+ HK$36.770 More Pricing...	Total:HK$56.68 Min: 1 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	2.38V	5.5V	SOIC	SOIC	I2C	18Pins	-	-	-40°C	85°C	-
M41ST87WMX6TR	2806826RL 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) Re-Reel Packaging Options	10+ HK$63.180 25+ HK$58.740 50+ HK$57.580 100+ HK$56.410 250+ HK$55.240	Total:HK$631.80 Min: 10 / 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	-
PCF85363ATL/AX	2890044RL 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) Re-Reel Packaging Options	100+ HK$6.890 250+ HK$6.470 500+ HK$6.220 1000+ HK$6.020 2500+ HK$5.900	Total:HK$689.00 Min: 100 / Mult: 1	I2C	HH:MM:SS: 12Hr / 24Hr	YY-MM-DD-DW	Calendar, Clock	HH:MM:SS: 12Hr / 24Hr	900mV	5.5V	DFN2626	DFN2626	I2C	10Pins	-	-	-40°C	85°C	-
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+ HK$6.670 250+ HK$6.260 500+ HK$6.020 1000+ HK$5.640 2500+ HK$5.600	Total:HK$667.00 Min: 100 / 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	-
M48T58Y-70MH1F	2849896RL Data Sheet RoHS	STMICROELECTRONICS RTC Clock/Calendar Date Time Format (YY-MM-DD-dd HH:MM:SS) Parallel 4.5V to 5.5V SOIC-28	Each (Supplied on Cut Tape) Re-Reel Packaging Options	10+ HK$140.040 25+ HK$131.230 50+ HK$129.930 100+ HK$128.620	Total:HK$1,400.40 Min: 10 / Mult: 1	Parallel	HH:MM:SS	YY-MM-DD-dd	Calendar, Clock	HH:MM:SS	4.5V	5.5V	SOIC	SOIC	Parallel	28Pins	-	-	0°C	70°C	-
PCF2123TS/1,118	2775930RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) SPI 1.1 V to 5.5 V supply TSSOP-14	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$6.980 250+ HK$6.530 500+ HK$6.280 1000+ HK$6.040 2500+ HK$5.920	Total:HK$698.00 Min: 100 / Mult: 1	SPI	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	1.1V	5.5V	TSSOP	TSSOP	SPI	14Pins	-	-	-40°C	85°C	-
ISL12057IUZ-T	2983744RL 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) Re-Reel Packaging Options	100+ HK$14.010 250+ HK$13.590 500+ HK$13.320 1000+ HK$13.050	Total:HK$1,401.00 Min: 100 / 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	-
ISL12026IBZ-T	2983742 Data Sheet RoHS	RENESAS RTC Alarm Date Time Format (Day/Date/Month/Year HH:MM:SS) I2C 2.7V to 5.5V Supply NSOIC-8	Each (Supplied on Cut Tape) Cut Tape	1+ HK$33.870 10+ HK$25.650 25+ HK$23.600 50+ HK$22.450 100+ HK$21.290 More Pricing...	Total:HK$33.87 Min: 1 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	2.7V	5.5V	NSOIC	NSOIC	I2C	8Pins	-	-	-40°C	85°C	-
PCF85263ATT/AJ	2775936RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply TSSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$5.580 250+ HK$5.240 500+ HK$5.090 1000+ HK$4.860 2500+ HK$4.590	Total:HK$558.00 Min: 100 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	TSSOP	TSSOP	I2C	8Pins	-	-	-40°C	85°C	-
M41T82ZM6F	2806834 Data Sheet RoHS	STMICROELECTRONICS RTC Date Time Format (Day/Date/Month/Year/Century HH:MM:SS:hh) I2C 2.38V to 5.5V Supply SOIC-8	Each	1+ HK$27.960 10+ HK$21.040 25+ HK$19.330 50+ HK$18.350 100+ HK$17.360 More Pricing...	Total:HK$27.96 Min: 1 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	2.38V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
PCF85363ATT/AJ	2775939RL Data Sheet RoHS	NXP Calendar Clock IC Format (YYYY:MM:WK:DD:hh:mm:ss/Binary) I2C 900 mV to 5.5 V supply TSSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$6.520 250+ HK$6.120 500+ HK$5.880 1000+ HK$5.430 2500+ HK$5.050	Total:HK$652.00 Min: 100 / Mult: 1	I2C	Binary	YYYY:MM:WK:DD:Hr:Min:Secs	Calendar, Clock	Binary	900mV	5.5V	TSSOP	TSSOP	I2C	8Pins	-	-	-40°C	85°C	-
MCP7940MT-I/SN	2901506RL 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) Re-Reel Packaging Options	100+ HK$5.630	Total:HK$563.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	1.8V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
ISL1208IB8Z-TK	2983745RL 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) Re-Reel Packaging Options	100+ HK$14.800 250+ HK$14.370 500+ HK$14.090 1000+ HK$13.800	Total:HK$1,480.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	Day; Date; Month; Year	Alarm RTC	HH:MM:SS	2.7V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-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$5.670 250+ HK$4.910 1000+ HK$4.540 2000+ HK$4.460	Total:HK$567.00 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	-
PCA85063ATT/AJ	2890041RL Data Sheet RoHS	NXP RTC Date Time Format (YY-MM-DD-dd HH:MM:SS) I2C 1.8V to 5.5V Supply TSSOP-8	Each (Supplied on Cut Tape) Re-Reel Packaging Options	100+ HK$7.570 250+ HK$7.110 500+ HK$6.840 1000+ HK$6.540 2500+ HK$6.330	Total:HK$757.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTC	HH:MM:SS	1.8V	5.5V	TSSOP	TSSOP	I2C	8Pins	-	AEC-Q100	-40°C	105°C	AEC-Q100
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+ HK$9.080 3300+ HK$8.150	Total:HK$908.00 Min: 100 / Mult: 1	I2C	HH:MM:SS	YY-MM-DD-dd	RTCC	HH:MM:SS	1.8V	5.5V	TDFN	TDFN	I2C	8Pins	-	-	-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+ HK$25.910 250+ HK$25.060 500+ HK$24.550 1000+ HK$24.060	Total:HK$2,591.00 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	16Pins	-	-	-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+ HK$20.270 250+ HK$20.140 500+ HK$20.000 1000+ HK$19.860	Total:HK$2,027.00 Min: 100 / Mult: 1	I2C	HH:MM:SS:hh	Day; Date; Month; Year; Century	Alarm RTC	HH:MM:SS:hh	2.7V	5.5V	SOIC	SOIC	I2C	8Pins	-	-	-40°C	85°C	-
M48T37V-10MH1F	3129609RL 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) Re-Reel Packaging Options	10+ HK$158.930 25+ HK$149.180 50+ HK$143.800 100+ HK$138.420	Total:HK$1,589.30 Min: 10 / Mult: 1	Parallel	HH:MM:SS	Day; Date; Month; Year; Century	RTC	HH:MM:SS	3V	3.6V	SOIC	SOIC	Parallel	44Pins	-	-	0°C	70°C	-
PCA85073ADP/Q900Z	3378955RL 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) Re-Reel Packaging Options	100+ HK$6.800 250+ HK$6.390 500+ HK$6.140 1000+ HK$5.830 2500+ HK$5.520	Total:HK$680.00 Min: 100 / 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