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Real Time Clocks

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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	Newark Part No.	Description / Manufacturer	Availability	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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DS1339BU+	73Y1228 Data Sheet + RoHS Date/Lot Code	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+ $5.52 10+ $4.68 25+ $4.47 50+ $4.26 100+ $4.05 250+ $3.84 500+ $3.44 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-
X1B0002420001	87X6753 Data Sheet + RoHS	RTC/CALENDAR, RX8010SJ, I2C, SOP-8 EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.27 10+ $2.17 25+ $2.00 50+ $1.81 100+ $1.62 250+ $1.41 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	-	-	Alarm RTC	1.6V	5.5V	SOP	8Pins	I2C	-40°C	85°C	-	-
DS1340Z-33+	78Y4780 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year SS:MM:HH), I2C, 2.97V to 5.5V Supply, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.08 10+ $4.57 25+ $4.31 50+ $4.03 100+ $3.73 300+ $3.62 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	HH:MM:SS	RTC	2.97V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
M48T58Y-70MH1F	51AC9311 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)	1+ $14.17 10+ $13.03 25+ $12.48 50+ $11.81 100+ $11.14	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 10) Add	YY-MM-DD-dd	HH:MM:SS	Calendar, Clock	4.5V	5.5V	SOIC	28Pins	Parallel	0°C	70°C	-	-
MCP79510-I/MS	12X8725 Data Sheet + RoHS	RTCC, SPI, 1KB EE, 64B SRAM, MSOP-10 MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.32 10+ $1.28 25+ $1.22 50+ $1.19 100+ $1.15	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	MSOP	10Pins	SPI	-40°C	85°C	-	AEC-Q100

MCP795W10-I/SL	12X8723 Data Sheet Data Sheet + RoHS	RTCC, SPI, 1KB EE, 64B SRAM, SOIC-14 MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.79 10+ $1.72 25+ $1.66 50+ $1.63 114+ $1.59 513+ $1.56 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	12Hr / 24Hr	Alarm RTC	1.8V	3.6V	SOIC	14Pins	SPI	-40°C	85°C	-	AEC-Q100

DS1341U+T&R	73Y1239 Data Sheet + RoHS	RTC, Day/Date/Month/Year, HH:MM:SS, Alarm RTC, I2C, 1.8 V to 5.5 V Supply, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each (Supplied on Cut Tape)	1+ $3.49 10+ $3.13 25+ $2.97 50+ $2.77 100+ $2.57 250+ $2.44 500+ $2.19 1000+ $1.98 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

DS1337S+	78Y4778 Data Sheet + RoHS Date/Lot Code	RTC, -40 TO 85DEG C ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $4.18 10+ $3.75 25+ $3.55 50+ $3.32 100+ $3.07 300+ $2.92 500+ $2.62 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	ss:mm:hh	RTC	1.8	5.5	SOIC	8	I2C, Serial	-40	85	-888	-999

DS1339BU+T	68AH9619 Data Sheet + RoHS Date/Lot Code	RTC, -40 TO 85DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $5.02 10+ $4.16 25+ $4.01 50+ $3.86 100+ $3.70 250+ $3.51 500+ $3.15 1000+ $2.66 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	YY-MM-DD-dd	HH:MM:SS	RTC	1.71V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

MAX31342EWA+	99AC9306 Data Sheet + RoHS	REAL TIME CLOCK, -40 TO 85DEG C ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.66 10+ $1.42 30+ $1.31 50+ $1.20 100+ $1.09 250+ $1.03 500+ $0.959 1000+ $0.758 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	Day; Date; Month; Year	HH:MM:SS	RTC	1.6	3.6	-	8	I2C	-40	85	-888	-888

RV-3049-C2-TB-QA-OPT.A	09X0511 Data Sheet + RoHS	REAL TIME CLOCK MODULE, -40 TO 125DEG C MICRO CRYSTAL You previously purchased this product. View in Order History		Each	1+ $9.18 10+ $8.76 25+ $7.58 50+ $7.00 100+ $6.22 250+ $5.91 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	YYYY:MM:DD:Hr:Min:Secs	24Hr	Alarm RTC	1.3V	5.5V	SON	10Pins	SPI	-40°C	125°C	-	-

RV-4162-C7-TA-QC-020	09X0517 Data Sheet + RoHS	RTC, I2C, RV-4162, 20PPM, 8SON MICRO CRYSTAL You previously purchased this product. View in Order History		Each	1+ $6.08 10+ $5.40 25+ $5.00 50+ $4.60 100+ $4.08 500+ $3.70 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year; Century	12Hr / 24Hr	RTC	1V	4.4V	LCC	8Pins	I2C	-40°C	85°C	-	-

DS1744-70+	73Y1367 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+ $38.91 5+ $37.36 10+ $35.81 36+ $34.26 60+ $32.59 108+ $30.91 252+ $29.23 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year; Century	HH:MM:SS	RTC	4.5V	5.5V	-	28Pins	Bytewide	0°C	70°C	-	-

DS1306+	75Y6245 Data Sheet + RoHS	RTC, 96BYTE, NVRAM, SPI / 3WIRE, 16DIP ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $7.72 10+ $6.98 25+ $6.65 50+ $6.21 100+ $5.77 250+ $5.51 500+ $5.03 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	YY-MM-DD	HH:MM:SS	Alarm RTC	2V	5.5V	DIP	16Pins	SPI	0°C	70°C	-	-

DS1338Z-18+	73Y1223 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.71 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.13 10+ $4.24 25+ $4.09 50+ $3.93 100+ $3.77 300+ $3.58 500+ $3.21 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	HH:MM:SS	RTC	1.71V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

DS1337U+T&R	73Y1216 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 (Supplied on Cut Tape)	1+ $3.44 10+ $3.08 25+ $2.91 50+ $2.71 100+ $2.52 250+ $2.39 500+ $2.14 1000+ $1.94 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

ISL12022MIBZ-T	94AC1625 Data Sheet + RoHS	RTC/CALENDAR, 128KB, TEMP SEN,20SOIC RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $7.55 10+ $6.82 25+ $6.51 50+ $6.08 100+ $5.65 250+ $5.40 500+ $4.92 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 10) Add	YY-MM-DD-dd	HH:MM:SS	RTC	2.7V	5.5V	SOIC	20Pins	I2C	-40°C	85°C	-	-

AB-RTCMC-32.768KHZ-AIGZ-S7-T	73AJ0500 Data Sheet + RoHS	REAL TIME CLOCK, I2C, -40 TO 85DEG C ROHS COMPLIANT: YES ABRACON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.79 10+ $4.31 25+ $4.05 50+ $3.79 100+ $3.53 250+ $3.35 500+ $3.01 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	YY-MM-DD-dd	HH:MM:SS:hh	RTC	1.3V	4.4V	CLCC	8Pins	I2C	-40°C	85°C	-	-

AB-RTCMC-32.768KHZ-IBO5-S3-T	73AJ0505 Data Sheet + RoHS	REAL TIME CLOCK, I2C, -40 TO 85DEG C ROHS COMPLIANT: YES ABRACON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $5.47 10+ $5.23 25+ $4.97	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 10) Add	YY-MM-DD-dd	HH:MM:SS:hh	RTC	1.5V	3.6V	Module	10Pins	I2C	-40°C	85°C	-	-

MCP79410-I/SN	20T6027 Data Sheet + RoHS	RTCC, DD:MM:YYHH:MM:SS, I2C, SOIC MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.06 10+ $1.02 25+ $0.979 50+ $0.954 100+ $0.928	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	DD:MM:YY	HH:MM:SS	RTC	0	0	SOIC	8	I2C	0	0	MCP79410 MCP79411 MCP79412	AEC-Q100

MCP7940M-I/SN	93T1810 Data Sheet + RoHS	RTCC, DD:MM:YYYYHH:MM:SS, I2C, SOIC MICROCHIP You previously purchased this product. View in Order History		Each	1+ $0.683 10+ $0.681 25+ $0.632 50+ $0.617 100+ $0.602	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	DD:MM:YYYY	HH:MM:SS	RTC	1.8	5.5	SOIC	8	I2C	-40	85	-	AEC-Q100

ISL12026IBZ-T	84AC6856 Data Sheet + RoHS	ALARM RTC, -40 TO 85DEG C, NSOIC-8 RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.31 10+ $3.67 25+ $3.51 50+ $3.35 100+ $3.18 250+ $3.02 500+ $2.70 1000+ $2.28 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	2.7V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

RV-8523-C3-TA-QC-020	09X0518 Data Sheet + RoHS	RTC, SPI, RV-8564, 20PPM, 10SON MICRO CRYSTAL You previously purchased this product. View in Order History		Each	1+ $6.56 10+ $6.25 25+ $5.41 50+ $5.00 100+ $4.45 250+ $4.22 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year; Century	24Hr	RTC	1.2V	5.5V	SON	10Pins	I2C	-40°C	85°C	-	-

X1B0002320001	87X6752 Data Sheet + RoHS	RTC/CALENDAR, RX6110SA, I2C/SPI, SOP-14 EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.10 10+ $3.86 25+ $3.62 50+ $3.33 100+ $3.00 250+ $2.61 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 100) Add	-	-	Alarm RTC	1.6V	5.5V	SOP	14Pins	I2C, SPI	-40°C	85°C	-	-

DS1337S+T&R	73Y1215 Data Sheet + RoHS Date/Lot Code	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 1.8 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.59 10+ $3.23 25+ $3.06 50+ $2.86 100+ $2.65 250+ $2.52 500+ $2.25 1000+ $2.04 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Mult: 1 Cut Tape (Min: 1) Re-Reel (Min: 10) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.8V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-