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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	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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DS1337+	2518743 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year ss:mm:hh), I2C, Serial, 1.8 V to 5.5 V, DIP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.345.20 10+ Rs.288.01 50+ Rs.271.03 100+ Rs.254.05 250+ Rs.241.02 500+ Rs.216.27 2500+ Rs.174.30 5000+ Rs.172.64 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	DIP	8Pins	I2C, Serial	-40°C	85°C	-	-
DS1302SN+	2515359 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, WSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.457.22 10+ Rs.376.82 88+ Rs.318.72 176+ Rs.302.54 264+ Rs.286.35 528+ Rs.244.02 1056+ Rs.231.57 2552+ Rs.230.74 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	WSOIC	8Pins	Serial	-40°C	85°C	-	-
DS1302S+	2519293 Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.435.65 10+ Rs.373.50 88+ Rs.322.87 176+ Rs.320.39 264+ Rs.303.96 528+ Rs.272.74 1056+ Rs.231.57 2552+ Rs.219.95 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	2V	5.5V	SOIC	8Pins	3 Wire, Serial	0°C	70°C	-	-
M41T80M6F	2806830 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year/Century, HH:MM:SS:hh), I2C, 2V to 5.5V Supply, SOIC-8 STMICROELECTRONICS You previously purchased this product. View in Order History	Each	1+ Rs.262.17 10+ Rs.235.21 25+ Rs.222.36 100+ Rs.192.70 250+ Rs.182.82 500+ Rs.164.04 1000+ Rs.138.35 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	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
MCP7940M-I/MS	2098889 Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, MSOP-8 MICROCHIP You previously purchased this product. View in Order History	Each	1+ Rs.57.79 25+ Rs.53.72 100+ Rs.51.78	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	MSOP	8Pins	I2C	-40°C	85°C	-	AEC-Q100

RV-8564-C2	1539389 Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10 MICRO CRYSTAL You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1539389 1539389RL in Re-reel	1+ Rs.521.05 10+ Rs.482.20 25+ Rs.453.24 50+ Rs.418.44 100+ Rs.396.92 250+ Rs.360.71 500+ Rs.318.05 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:YYYY	HH:MM:SS	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

MAX31328NELB+	3677599 Data Sheet + RoHS	Real Time Clock, Alarm RTC, I2C, 12Hr / 24Hr, 2.3 V to 5.5 V, LGA-10, -40 °C to 85 °C ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.397.67 10+ Rs.345.14 25+ Rs.337.70 100+ Rs.287.34 490+ Rs.244.20 980+ Rs.210.13 2940+ Rs.199.63 5390+ Rs.195.64 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	12Hr / 24Hr	Alarm RTC	2.3V	5.5V	LGA	10Pins	I2C	-40°C	85°C	-	-

DS17887-5+	2515438 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, EDIP-24 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.2,002.44 14+ Rs.1,847.78 28+ Rs.1,763.94 112+ Rs.1,576.72 252+ Rs.1,556.37	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	EDIP	24Pins	Multiplexed	0°C	70°C	-	-

MCP79412T-I/MNY	2361123 Data Sheet + RoHS	Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8 MICROCHIP You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2361123 2361123RL in Re-reel	1+ Rs.102.09 25+ Rs.95.09	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	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	AEC-Q100

DS1388Z-33+	2515353 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), I2C, 2.97 V to 3.63 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.548.50 10+ Rs.486.77 25+ Rs.472.49 100+ Rs.410.26 300+ Rs.391.82 500+ Rs.357.24 1000+ Rs.304.44 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:hh	RTC	2.97V	3.63V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

MCP7940NT-I/MNY	2851655 Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), I2C, 1.8V to 5.5V Supply, TDFN-8 MICROCHIP You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2851655 2851655RL in Re-reel	1+ Rs.81.61	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	RTCC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	-

M48T58Y-70MH1F	2849896 Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YY-MM-DD-dd, HH:MM:SS), Parallel, 4.5V to 5.5V, SOIC-28 STMICROELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2849896 2849896RL in Re-reel	1+ Rs.1,303.21 10+ Rs.1,198.21 25+ Rs.1,148.55 100+ Rs.1,011.80 250+ Rs.962.15 500+ Rs.900.28 936+ Rs.882.28 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	Calendar, Clock	4.5V	5.5V	SOIC	28Pins	Parallel	0°C	70°C	-	-

DS1248Y-70+	2515444 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), Bytewide, 4.5 V to 5.5 V, EDIP-32 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.3,578.33 10+ Rs.3,318.78 30+ Rs.3,200.25 100+ Rs.3,065.37	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:hh	RTC	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-

RV-3029-C2-TA-QC-OPT.A	2358507 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+ Rs.784.69 10+ Rs.726.04 25+ Rs.682.33 50+ Rs.629.80 100+ Rs.597.31 250+ Rs.542.66 500+ Rs.478.27 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:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

RV-3049-C2-TA-QC-OPT.A	2358514 Data Sheet + RoHS	RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10 MICRO CRYSTAL You previously purchased this product. View in Order History	Each	1+ Rs.765.06 10+ Rs.707.88 25+ Rs.665.27 50+ Rs.614.05 100+ Rs.582.37 250+ Rs.529.09 500+ Rs.466.31 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:DD:Hr:Min:Secs	24Hr	RTC	1.3V	5.5V	SON	10Pins	SPI	-40°C	85°C	-	-

PCF85263AUKZ	3770343 Data Sheet + RoHS	Real-Time Clock, I2C, 0.9 V to 5.5V, HH:MM:SS:hh, Day; Date; Month; Year, WLCSP-12 NXP You previously purchased this product. View in Order History		1+ Rs.111.22 10+ Rs.97.11 100+ Rs.76.78 500+ Rs.72.29 1000+ Rs.57.10 2500+ Rs.53.29 5000+ Rs.52.02 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:hh	Alarm RTC	900mV	5.5V	WLCSP	12Pins	I2C	-40°C	85°C	-	-

RV-3049-C3-TB-QA-OPT.A	2358520 Data Sheet + RoHS	RTC IC, Date Time Format (Year/Month/Date/Hr/Min/Sec 24Hr), SPI, 1.3 V to 5.5 V, SON-10 MICRO CRYSTAL You previously purchased this product. View in Order History	Each	1+ Rs.491.83 5+ Rs.435.99	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	SPI	-40°C	125°C	-	-

DS1672U-33+	2515400 Data Sheet + RoHS	RTC IC, Date Time Format (Binary), I2C, 2.97 V to 3.63 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.342.71 10+ Rs.291.33 50+ Rs.291.26 100+ Rs.252.32 250+ Rs.239.04 500+ Rs.214.14 2500+ Rs.189.21 5000+ Rs.176.74 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	2.97V	3.63V	µSOP	8Pins	I2C	-40°C	85°C	-	-

MCP795W10-I/SL	2361120 Data Sheet + RoHS	Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, SPI, 1.8 V to 3.6 V, SOIC-14 MICROCHIP You previously purchased this product. View in Order History	Each	1+ Rs.142.45 25+ Rs.132.68 114+ Rs.129.97	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	12Hr / 24Hr	Alarm RTC	1.8V	3.6V	SOIC	14Pins	SPI	-40°C	85°C	-	AEC-Q100

RV-8564-C2	1539389RL Data Sheet + RoHS	RTC IC, Date Time Format (Date/Month/Year hh:mm:ss), I2C, 1.2 V to 5.5 V, SON-10 MICRO CRYSTAL You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:1539389RL 1539389 in Cut Tape	100+ Rs.396.92 250+ Rs.360.71 500+ Rs.318.05	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	DD:MM:YYYY	HH:MM:SS	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

DS1501YZ+	2515419 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year/Century hh:mm:ss), Bytewide, 4.5 V to 5.5 V, WSOIC-28 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.1,030.52 10+ Rs.947.50 25+ Rs.917.38 100+ Rs.916.48 250+ Rs.862.39 500+ Rs.808.30 1000+ Rs.783.07 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	RTC	4.5V	5.5V	WSOIC	28Pins	Bytewide	0°C	70°C	-	-

DS1391U-3+	2515394 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.7 V to 3.3 V, µSOP-10 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.417.39 10+ Rs.355.24 50+ Rs.354.53 100+ Rs.307.10 250+ Rs.291.33 500+ Rs.261.45 1000+ Rs.219.95 2500+ Rs.212.99 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:hh	Alarm RTC	2.7V	3.3V	µSOP	10Pins	SPI	-40°C	85°C	-	-

DS1392U-33+	2515397 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), SPI, 2.97 V to 5.5 V, µSOP-10 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.415.83 10+ Rs.352.75 50+ Rs.328.68 100+ Rs.304.61 250+ Rs.288.84 500+ Rs.260.62 1000+ Rs.219.95 2500+ Rs.212.99 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:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-

MCP79412T-I/MNY	2361123RL Data Sheet + RoHS	Alarm RTC IC, Year/Month/Week/Date/Hr/Min/Sec 12Hr / 24Hr, I2C, 1.8 V to 5.5 V, TDFN-8 MICROCHIP You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2361123RL 2361123 in Cut Tape	25+ Rs.95.09	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	AEC-Q100

DS1342U+	2515385 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	Each	1+ Rs.324.79 10+ Rs.275.95 50+ Rs.257.23 100+ Rs.238.50 250+ Rs.226.29 500+ Rs.202.69 2500+ Rs.162.80 5000+ Rs.156.87 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	1.8V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-