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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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Manufacturer Part No	Order Code	Description / Manufacturer	Price For	Price (Incl JCT)	Quantity	Date Format	Clock Format	Clock IC Type	Supply Voltage Min	Supply Voltage Max	Clock IC Case Style	No. of Pins	IC Interface Type	Operating Temperature Min	Operating Temperature Max	Product Range	Automotive Qualification Standard
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DS1685E-3+	2515364 Data Sheet + RoHS	Alarm RTC IC, Day/Date/Month/Year/Century hh:mm:ss, Multiplexed, 2.7 V to 3.7 V, TSSOP-24 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥1,871.60 (¥2,058.76) 10+ ¥1,283.79 (¥1,412.17) 62+ ¥1,011.04 (¥1,112.14) 124+ ¥937.37 (¥1,031.11) 310+ ¥909.15 (¥1,000.07) 558+ ¥906.02 (¥996.62) 1054+ ¥902.88 (¥993.17) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Alarm RTC	2.7V	3.7V	TSSOP	24Pins	Multiplexed	0°C	70°C	-	-
DS1339BU+	2515378 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.71 V to 5.5 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥990.66 (¥1,089.73) 10+ ¥658.35 (¥724.19) 50+ ¥562.74 (¥619.01) 100+ ¥525.12 (¥577.63) 250+ ¥523.55 (¥575.91) 500+ ¥513.08 (¥564.39) 1000+ ¥511.65 (¥562.82) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	SOP	8Pins	I2C	-40°C	85°C	-	-
DS1744-70IND+	2515516 Data Sheet + RoHS	RTC, Timekeeper NVSRAM, Bytewide, 4.5 V to 5.5 V, EDIP-28 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥6,801.39 (¥7,481.53) 12+ ¥6,796.68 (¥7,476.35) 36+ ¥5,831.10 (¥6,414.21) 108+ ¥5,714.48 (¥6,285.93)	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	RTC	4.5V	5.5V	EDIP	28Pins	Bytewide	-40°C	85°C	-	-
MCP7940M-I/ST	2098892 Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, TSSOP-8 MICROCHIP You previously purchased this product. View in Order History	Each	1+ ¥104.56 (¥115.02) 25+ ¥101.27 (¥111.40) 100+ ¥98.60 (¥108.46)	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.8V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	AEC-Q100
PCF8593T/1,118	2775931 Data Sheet + RoHS	Calendar, Clock IC, Format (YYYY:MM:WK:DD:hh:mm:ss/Binary), I2C, 2.5 V to 6 V supply, SOIC-8 NXP You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥564.30 (¥620.73) 10+ ¥391.88 (¥431.07) 25+ ¥378.82 (¥416.70) 50+ ¥365.76 (¥402.34) 100+ ¥352.69 (¥387.96) 250+ ¥335.45 (¥369.00) 500+ ¥324.48 (¥356.93) 1000+ ¥315.07 (¥346.58) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	2.5V	6V	SOIC	8Pins	I2C	-40°C	85°C	-	-

M41T93RQA6F	2806840 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), SPI, 2.7V to 5.5V Supply, QFN-16 STMICROELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥558.03 (¥613.83) 10+ ¥405.99 (¥446.59) 25+ ¥393.97 (¥433.37) 50+ ¥381.95 (¥420.15) 100+ ¥369.93 (¥406.92) 250+ ¥354.26 (¥389.69) 500+ ¥343.29 (¥377.62) 1000+ ¥332.31 (¥365.54) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	5.5V	QFN	16Pins	SPI	-40°C	85°C	-	-

DS1340C-33#	2729047 Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 2.97 V to 5.5 V supply, SOIC-16 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥1,608.26 (¥1,769.09) 10+ ¥1,255.57 (¥1,381.13) 46+ ¥1,053.67 (¥1,159.04) 138+ ¥887.21 (¥975.93) 276+ ¥841.75 (¥925.93) 506+ ¥804.13 (¥884.54) 1012+ ¥788.05 (¥866.86) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	DD:MM:YY	HH:MM:SS	RTC	2.97V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-

DS3234S#	3404558 Data Sheet + RoHS	REAL TIME CLOCK, 2V TO 5.5V, SOIC-20 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥2,202.34 (¥2,422.57) 10+ ¥1,528.32 (¥1,681.15) 36+ ¥1,294.76 (¥1,424.24) 108+ ¥1,235.59 (¥1,359.15) 252+ ¥1,206.00 (¥1,326.60) 504+ ¥1,176.41 (¥1,294.05) 1008+ ¥1,146.82 (¥1,261.50) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	SOIC	20Pins	Serial, SPI	0°C	70°C	-	-

DS1338C-33#T&R	3404544 Data Sheet + RoHS	RTC, -40 TO 85DEG C ANALOG DEVICES You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥1,730.80 (¥1,903.88) 10+ ¥1,210.77 (¥1,331.85) 25+ ¥1,076.65 (¥1,184.32) 100+ ¥926.63 (¥1,019.29) 250+ ¥853.95 (¥939.35) 500+ ¥809.69 (¥890.66) 1000+ ¥793.50 (¥872.85) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	YY-MM-DD	HH:MM:SS	RTC	3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-

RV-3029-C2-TB-QA-OPT.B	2358509 Data Sheet + RoHS	RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), I2C, 1.3 V to 5.5 V, SON-10 MICRO CRYSTAL You previously purchased this product. View in Order History	Each	1+ ¥1,338.83 (¥1,472.71) 10+ ¥1,002.12 (¥1,102.33) 25+ ¥897.48 (¥987.23) 50+ ¥873.19 (¥960.51)	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	YYYY:MM:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	125°C	-	-

AB0805-T3	2302153 Data Sheet + RoHS	RTC IC, RC/XTAL, 1.7 V to 3.6 V, QFN, 16Pins, I2C ABRACON You previously purchased this product. View in Order History	Each	5+ ¥358.96 (¥394.86) 50+ ¥250.80 (¥275.88) 250+ ¥174.00 (¥191.40) 500+ ¥169.29 (¥186.22) 1500+ ¥167.49 (¥184.24)	Restricted Item Minimum order of 5 items Multiples of 5 only Please enter a valid quantity Add Min: 5 Mult: 5	-	-	RTC	1.7V	3.6V	QFN	16Pins	I2C	-40°C	85°C	AB08XX	-

DS1338U-18+	2515374 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.71 V to 5.5 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥1,181.90 (¥1,300.09) 10+ ¥788.46 (¥867.31) 50+ ¥622.30 (¥684.53) 100+ ¥569.01 (¥625.91) 250+ ¥512.58 (¥563.84) 500+ ¥504.73 (¥555.20) 1000+ ¥500.81 (¥550.89) 2500+ ¥496.89 (¥546.58) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	SOP	8Pins	I2C	-40°C	85°C	-	-

ISL12022MAIBZ	2113281 Data Sheet + RoHS	RTC, Date Time Format (YY/MM/DD/dd, HH:MM:SS), I2C, 2.7V to 5.5V Supply, SOIC-20 RENESAS You previously purchased this product. View in Order History	Each	1+ ¥1,158.39 (¥1,274.23) 10+ ¥1,047.09 (¥1,151.80) 25+ ¥998.50 (¥1,098.35) 50+ ¥932.67 (¥1,025.94) 100+ ¥866.83 (¥953.51) 250+ ¥827.64 (¥910.40) 500+ ¥656.79 (¥722.47) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	YY-MM-DD-dd	HH:MM:SS	RTC	2.7V	5.5V	SOIC	20Pins	I2C	-40°C	85°C	-	-

DS12885QN+	2515410 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, PLCC-28 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥2,351.25 (¥2,586.38) 10+ ¥1,639.61 (¥1,803.57) 39+ ¥1,377.84 (¥1,515.62) 117+ ¥1,326.76 (¥1,459.44) 273+ ¥1,301.23 (¥1,431.35) 507+ ¥1,275.70 (¥1,403.27) 1014+ ¥1,250.17 (¥1,375.19) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	4.5V	5.5V	PLCC	28Pins	Multiplexed	-40°C	85°C	-	-

DS1685EN-5+	2515366 Data Sheet + RoHS	Alarm RTC IC, Day/Date/Month/Year/Century hh:mm:ss, Multiplexed, 4.5 V to 5.5 V, TSSOP-24 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥2,042.46 (¥2,246.71) 10+ ¥1,457.78 (¥1,603.56) 62+ ¥1,103.00 (¥1,213.30) 124+ ¥1,081.32 (¥1,189.45) 310+ ¥1,059.63 (¥1,165.59) 558+ ¥1,011.04 (¥1,112.14) 1054+ ¥995.37 (¥1,094.91) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS	Alarm RTC	4.5V	5.5V	TSSOP	24Pins	Multiplexed	-40°C	85°C	-	-

DS1337U+	2518700 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, 1.8 V to 5.5 V, MSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥840.18 (¥924.20) 10+ ¥562.74 (¥619.01) 50+ ¥517.28 (¥569.01) 100+ ¥471.82 (¥519.00) 250+ ¥427.93 (¥470.72) 500+ ¥401.28 (¥441.41) 2500+ ¥355.83 (¥391.41) 5000+ ¥348.72 (¥383.59) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	ss:mm:hh	RTC	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-

M41T82SM6F	2806833 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 3V to 5.5V Supply, SOIC-8 STMICROELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥483.89 (¥532.28) 10+ ¥334.35 (¥367.79) 25+ ¥323.06 (¥355.37) 50+ ¥311.78 (¥342.96) 100+ ¥300.49 (¥330.54) 250+ ¥284.98 (¥313.48) 500+ ¥276.51 (¥304.16) 1000+ ¥268.05 (¥294.86) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	3V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

DS1904L-F5#	2765024 Data Sheet + RoHS	RTC iButton, Date Time Format (Binary/Binary), Serial, 2.8 V to 6 V supply, F5 MicroCan ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥2,690.41 (¥2,959.45) 10+ ¥1,938.09 (¥2,131.90) 25+ ¥1,744.78 (¥1,919.26) 100+ ¥1,528.96 (¥1,681.86) 300+ ¥1,406.66 (¥1,547.33) 500+ ¥1,371.08 (¥1,508.19) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Binary	Binary	RTC	2.8V	6V	Module	2Pins	-	-40°C	85°C	-	-

DS1338C-3#	2798727 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.7 V to 5.5 V supply, SOIC-16 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥1,530.67 (¥1,683.74) 10+ ¥1,045.37 (¥1,149.91) 46+ ¥849.28 (¥934.21) 138+ ¥834.72 (¥918.19) 276+ ¥827.45 (¥910.20) 506+ ¥820.18 (¥902.20) 1012+ ¥812.91 (¥894.20) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.7V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-

M41ST85WMX6TR	2806825 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 2.7V to 3.6V Supply, SOIC-28 STMICROELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥1,268.11 (¥1,394.92) 10+ ¥982.83 (¥1,081.11) 25+ ¥912.29 (¥1,003.52) 50+ ¥873.10 (¥960.41) 100+ ¥833.91 (¥917.30) 250+ ¥796.29 (¥875.92) 500+ ¥774.35 (¥851.79) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	2.7V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-

DS3234S#T&R	2798762 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), SPI, 2 V to 5.5 V supply, SOIC-20 ANALOG DEVICES You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥2,055.72 (¥2,261.29) 10+ ¥1,419.35 (¥1,561.29) 25+ ¥1,253.41 (¥1,378.75) 100+ ¥1,065.73 (¥1,172.30) 250+ ¥1,048.64 (¥1,153.50) 500+ ¥1,040.09 (¥1,144.10) 1000+ ¥1,031.54 (¥1,134.69) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2V	5.5V	SOIC	20Pins	SPI	0°C	70°C	-	-

ISL1208IU8Z-TK	3869498 Data Sheet + RoHS	Real Time Clock/Calendar IC, I2C, 2.7 V to 5.5 V, HH:MM:SS, MSOP-8, -40 °C to 85 °C RENESAS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥565.87 (¥622.46) 10+ ¥443.61 (¥487.97) 25+ ¥419.05 (¥460.96) 50+ ¥394.49 (¥433.94) 100+ ¥369.93 (¥406.92) 250+ ¥332.31 (¥365.54) 500+ ¥310.37 (¥341.41) 1000+ ¥287.19 (¥315.91) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.7V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-

AB0805-T3	2467702 Data Sheet + RoHS	RTC IC, Day:Date:Month:Year:Century, HH:MM:SS:hh, 1.5 V to 3.6 V, QFN, 16Pins, I2C ABRACON You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2467702 3819894 in Full Reel	5+ ¥373.61 (¥410.97) 50+ ¥261.04 (¥287.14) 250+ ¥181.11 (¥199.22) 500+ ¥177.68 (¥195.45)	Restricted Item Minimum order of 5 items Multiples of 5 only Please enter a valid quantity Add Min: 5 Mult: 5	Day; Date; Month; Year; Century	HH:MM:SS:hh	RTC	1.5V	3.6V	QFN	16Pins	I2C	-40°C	85°C	-	-

DS1340Z-3+	2515351 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.7 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ ¥940.50 (¥1,034.55) 10+ ¥741.43 (¥815.57) 25+ ¥684.22 (¥752.64) 100+ ¥627.00 (¥689.70) 300+ ¥573.71 (¥631.08) 500+ ¥540.79 (¥594.87) 1000+ ¥512.58 (¥563.84) 2500+ ¥489.06 (¥537.97) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year	HH:MM:SS	RTC	2.7V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

M41ST87WMX6TR	2806826 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 3V to 3.6V Supply, SOIC-28 STMICROELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ ¥1,506.37 (¥1,657.01) 10+ ¥1,174.06 (¥1,291.47) 25+ ¥1,090.98 (¥1,200.08) 50+ ¥1,045.53 (¥1,150.08) 100+ ¥1,000.07 (¥1,100.08) 250+ ¥956.18 (¥1,051.80) 500+ ¥929.53 (¥1,022.48) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	Day; Date; Month; Year; Century	HH:MM:SS:hh	Alarm RTC	3V	3.6V	SOIC	28Pins	I2C	-40°C	85°C	-	-