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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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DS12887+	78Y4773 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year 12Hr/24Hr), Multiplexed, 4.5V to 5.5 V, DIP-24 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $12.42 10+ $10.97 28+ $10.31 56+ $9.65 112+ $9.41 252+ $9.18 504+ $8.77 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	4.5V	5.5V	EDIP	24Pins	Multiplexed	0°C	70°C	-	-
DS1307ZN+T&R	38AC0918 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year HH:MM:SS), I2C, 4.5V to 5.5V Supply, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.70 10+ $4.23 25+ $4.00 50+ $3.73 100+ $3.47 250+ $3.28 500+ $2.95 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	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
PCF2123TS/1,118	31AC6844 Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YYYY-MM-DD-dd, HH:MM:SS, Binary) SPI, 1.1V to 5.5V, TSSOP-14 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.52 10+ $1.37 25+ $1.29 50+ $1.19 100+ $1.10 250+ $1.03 500+ $0.901 1000+ $0.747 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	1.1	5.5	TSSOP	14	SPI	-40	85	-888	-888
DS1682S+	78Y4787 Data Sheet + RoHS Date/Lot Code	RTC, Date Time Format (Binary), I2C, 2.5V to 5.5V Supply, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $6.92 10+ $6.24 25+ $5.96 50+ $5.56 100+ $5.17 300+ $4.94 500+ $4.50 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Binary	Binary	Elapsed Time Recorder	2.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1307Z+T&R	38AC0917 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year HH:MM:SS), I2C, 4.5V to 5.5V Supply, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.29 10+ $3.86 25+ $3.64 50+ $3.41 100+ $3.16 250+ $3.00 500+ $2.68 1000+ $2.43 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	4.5V	5.5V	SOIC	8Pins	I2C	0°C	70°C	-	-

DS12R885S-5+	38AC0909 Data Sheet + RoHS Date/Lot Code	RTC, MULTIPLEXED, 5.5V, SOIC-24 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.73 10+ $5.15 25+ $4.87	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	4.5V	5.5V	SOIC	24Pins	Bytewide	-40°C	85°C	-	-

M41T11MH6F	51AC9308 Data Sheet + RoHS	512BIT SERIAL ACCESS TIMEKEEPER SRAM STMICROELECTRONICS You previously purchased this product. View in Order History		Each	1+ $7.10 10+ $6.42 25+ $6.12 50+ $5.71 100+ $5.31 250+ $5.08 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	Calendar, Clock	2V	5.5V	SOIC	28Pins	Serial	-40°C	85°C	-	-

DS1307ZN+	68AC5064 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, Serial, 4.5V to 5.5V Supply, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.73 10+ $5.15 25+ $4.87 50+ $4.54 100+ $4.22 300+ $4.00 500+ $3.59 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	4.5	5.5	SOIC	8	I2C	-40	85	-888	-888

ISL12022IBZ-T7A	84AC6855 Data Sheet + RoHS	RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 2.7V to 5.5V Supply, NSOIC-8 RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $5.81 10+ $4.95 25+ $4.72 50+ $4.51 100+ $4.28 250+ $4.05 500+ $3.65 1000+ $3.07 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	2.7	5.5	NSOIC	8	I2C	-40	85	-888	-888

X1B0003010001	39AH9416 Data Sheet + RoHS	RTC, -40 TO 85DEG C ROHS COMPLIANT: YES EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.97 10+ $3.73 25+ $3.51 50+ $3.22 100+ $2.91 250+ $2.53 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	1.6V	5.5V	-	10Pins	I2C	-40°C	85°C	-	-

PCF85063AT/AAZ	41AH8246 Data Sheet + RoHS Date/Lot Code	CLOCK IC, AEC-Q100, SOIC-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $0.36 10+ $0.36 25+ $0.36 50+ $0.36 100+ $0.36 250+ $0.36 500+ $0.36 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	900	5.5	SOIC	8	I2C	-40	85	-888	AEC-Q100

DS3234S#	68AH9636 Data Sheet + RoHS	RTC, 0 TO 70DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $11.65 10+ $10.53 25+ $10.04 72+ $10.03 108+ $9.37 252+ $8.71 504+ $8.31 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	DD:MM:YY	HH:MM:SS	RTC	2V	5.5V	SOIC	20Pins	Serial, SPI	0°C	70°C	-	-

MAX31343EKA+	74AH4767 Data Sheet + RoHS	RTC, -40 TO 85DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.19 10+ $4.66 30+ $4.41 50+ $4.11 100+ $3.81	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	1.6V	5.5V	WLP	8Pins	I2C	-40°C	85°C	-	-

DS1683S+	73Y1325 Data Sheet + RoHS Date/Lot Code	Elapsed Time Recorder IC, Date Time Format, I2C, 2.5 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $6.39 10+ $5.74 25+ $5.43 50+ $5.06 100+ $4.70 300+ $4.46 500+ $4.00 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	-	-	Elapsed Time Recorder	2.5V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

DS1391U-33+T&R	73Y1265 Data Sheet + RoHS	RTC, Day/Date/Month/Year, HH:MM:SS:hh, Alarm RTC, SPI, 2.97 V to 5.5 V Supply, µSOP-10 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.44 10+ $3.99 25+ $3.76 50+ $3.52 100+ $3.26 250+ $3.10 500+ $2.78 1000+ $2.51 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:hh	Alarm RTC	2.97V	5.5V	µSOP	10Pins	SPI	-40°C	85°C	-	-

MCP79412T-I/MNY	12X8722 Data Sheet Data Sheet + RoHS	RTCC, GP I2C, 1KB EE 64B SRAM, ID, 8TDFN MICROCHIP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.25 10+ $1.20 25+ $1.15 50+ $1.12 100+ $1.09	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	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	TDFN	8Pins	I2C	-40°C	85°C	-	AEC-Q100

DS1340Z-33+T&R	73Y1237 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.97 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.44 10+ $3.98 25+ $3.76 50+ $3.52 100+ $3.26 250+ $3.09 500+ $2.77 1000+ $2.51 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	2.97V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-

DS1302SN+T&R	73Y1198 Data Sheet + RoHS	RTC, Day/Date/Month/Year, HH:MM:SS, RTC, Serial, 2 V to 5.5 V Supply, WSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.78 10+ $4.29 25+ $4.06 50+ $3.79 100+ $3.52 250+ $3.34 500+ $3.00 1000+ $2.70 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	2	5.5	WSOIC	8	Serial	-40	85	-999	-999

DS1306E+T&R	73Y1204 Data Sheet + RoHS	RTC, Day/Date/Month/Year, HH:MM:SS, Alarm RTC, SPI, 2 V to 5.5 V Supply, TSSOP-20 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $6.16 10+ $5.15 25+ $4.97 50+ $4.79 100+ $4.61 250+ $4.41 500+ $4.02 1000+ $3.50 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	5.5	TSSOP	20	SPI	0	70	-999	-999

DS12C887A+	73Y1080 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+ $11.92 10+ $10.95 28+ $10.73 56+ $10.50 112+ $9.87 252+ $9.24 504+ $8.77 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	Alarm RTC	4.5V	5.5V	-	24Pins	Multiplexed	0°C	70°C	-	-

AB1805-T3	40Y2064 Data Sheet Data Sheet + RoHS	REAL TIME CLOCK, I2C, QFN-16 ABRACON You previously purchased this product. View in Order History	View Additional Avnet Stock	Each (Supplied on Cut Tape)	1+ $2.09 10+ $1.79 25+ $1.66 50+ $1.55 100+ $1.43 250+ $1.34 500+ $1.24 More Pricing...	Restricted Item Minimum order of 5 items Multiples of 5 only Please enter a valid quantity Mult: 5 Cut Tape (Min: 5) Re-Reel (Min: 100) Add	Day; Date; Month; Year; Century	HH:MM:SS:hh	RTC	1.5V	3.6V	QFN	16Pins	I2C	-40°C	85°C	-	-

PCF8523TS/1,118	68X3137 Data Sheet Data Sheet + RoHS	REAL TIME CLOCK/CALENDAR, BINARY, TSSOP NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.71 10+ $1.54 25+ $1.45 50+ $1.35 100+ $1.23 250+ $1.16 500+ $1.01 1000+ $0.84 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	YYYY:MM:WK:DD:Hr:Min:Secs	Binary	Calendar, Clock	1.2V	5.5V	TSSOP	14Pins	I2C	-40°C	85°C	-	-

PCF85063ATT/AJ	31AC6849 Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YYYY-MM-DD-dd, HH:MM:SS, Binary) I2C, 0.9V to 5.5V, TSSOP-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.04 10+ $0.929 25+ $0.882 50+ $0.804 100+ $0.724 250+ $0.677 500+ $0.599 1000+ $0.472 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	900	5.5	TSSOP	8	I2C	-40	85	-888	-888

M41T94MH6F	45AC7418 Data Sheet + RoHS	RTC, Day/Date/Month/Year/Century, HH:MM:SS:hh, Alarm RTC, SPI, 2.7 V to 5.5 V Supply, SOH-28 STMICROELECTRONICS You previously purchased this product. View in Order History		Each	1+ $3.75 10+ $3.75 25+ $3.75 50+ $3.75 100+ $3.75 250+ $3.75 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:hh	Alarm RTC	2.7	5.5	SOH	28	SPI	-40	85	-888	-888

DS3232MZ+TRL	94AC1347 Data Sheet + RoHS	RTC, -40 TO 85DEG C ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $9.80 10+ $8.86 25+ $8.19 50+ $7.77 100+ $7.34 250+ $7.01 500+ $6.40 1000+ $5.57 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; Century	HH:MM:SS	RTC	2.3	4.5	SOIC	8	I2C	-40	85	-888	-888