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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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PCF85363ATL/AX	61AC1302 Data Sheet + RoHS	CLOCK/CALENDAR, AEC-Q100, I2C, DFN-10 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.64 10+ $1.47 25+ $1.36 50+ $1.25 100+ $1.14 250+ $1.05 500+ $0.951 1000+ $0.751 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	900mV	5.5V	DFN2626	10Pins	I2C	-40°C	85°C	-	AEC-Q100
M41T11M6F	03AJ2372 Data Sheet + RoHS	REAL TIME CLOCK/CALENDAR, BINARY, SOIC-8 STMICROELECTRONICS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.65 10+ $4.18 25+ $3.95 50+ $3.68 100+ $3.42 250+ $3.24 500+ $2.92 1000+ $2.46 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	DD:MM:YYYY	ss:mm:hh	RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-
DS1388Z-33+	73Y1256 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+ $6.74 10+ $6.09 25+ $5.80 50+ $5.43 100+ $5.04 300+ $4.81 500+ $4.40 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:hh	RTC	2.97V	3.63V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
X1B0003010002	87X6754 Data Sheet + RoHS	RTC/CALENDAR, RX8900CE UB, I2C, SMD EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.25 10+ $3.11 25+ $2.87 50+ $2.58 100+ $2.32 250+ $2.01 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	-	-	Alarm RTC	2.5V	5.5V	-	10Pins	I2C	-40°C	85°C	-	-
DS1338U-33+	73Y1221 Data Sheet + RoHS	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 3 V to 5.5 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $5.13 10+ $4.37 25+ $4.17 50+ $3.98 100+ $3.78 250+ $3.59 500+ $3.22 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	3V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

M41T93RMY6F	45AC7415 Data Sheet + RoHS	ALARM RTC, 32B, SPI, 5.5V, SOIC-18 STMICROELECTRONICS You previously purchased this product. View in Order History		Each	1+ $6.33 10+ $5.74 25+ $5.45 50+ $5.12 100+ $4.79 250+ $4.57 500+ $4.15 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	2.7V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-

ISL1208IU8Z-T7A	82Y6685 Data Sheet + RoHS	REAL TIME CLOCK W/ SRAM, 2B, MSOP-8 RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $5.41 10+ $4.86 25+ $4.59 50+ $4.28 100+ $3.98	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	2.7V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-

ISL12057IUZ-T	84AC6858 Data Sheet + RoHS	RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 1.4V to 3.6V Supply, MSOP-8 RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.84 10+ $2.55 25+ $2.41 50+ $2.25 100+ $2.09 250+ $1.98 500+ $1.77 1000+ $1.50 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: 10) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.4	3.6	MSOP	8	I2C	-40	85	-888	-888

DS3232S#T&R	48AC1643 Data Sheet + RoHS	ALARM RTC, I2C, 5.5V, SOIC-20 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $7.20	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	2.3	5.5	SOIC	20	I2C	0	70	-888	-888

DS1302Z+	78Y4774 Data Sheet + RoHS	Timekeeper, Date Time Format (Day/Date/Month/Year HH:MM:SS), 3 Wire, Serial, 2V to 5.5 V, SOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.19 10+ $4.41 25+ $4.21 50+ $4.01 100+ $3.81 300+ $3.62 500+ $3.24 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	Timekeeper	2V	5.5V	SOIC	8Pins	3 Wire	0°C	70°C	-	-

DS1302+	81Y9050 Data Sheet + RoHS Date/Lot Code	RTC, Date Time Format (Day; Date; Month; Year, HH:MM:SS), 3 Wire, Serial, 2V to 5.5V Supply, DIP-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.32 10+ $4.52 25+ $4.31 50+ $4.11 100+ $3.91 250+ $3.70 500+ $3.33 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	Timekeeper	2V	5.5V	DIP	8Pins	3 Wire, Serial	0°C	70°C	-	-

DS1305+	81Y9052 Data Sheet + RoHS	RTC, Date Time Format (Day/Date/Month/Year 12Hr/24Hr), 3 Wire, Serial, 2V to 5.5 V, DIP-16 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	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	2V	5.5V	DIP	16Pins	SPI	0°C	70°C	-	-

X1B0003710002	39AH9418 Data Sheet + RoHS Date/Lot Code	RTC, -40 TO 105DEG C ROHS COMPLIANT: YES EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.34 10+ $3.13 25+ $2.95 50+ $2.70 100+ $2.44 250+ $2.12 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	1.5V	5.5V	-	10Pins	I2C	-40°C	105°C	-	-

ISL1209IU10Z-TK	49AH9240 Data Sheet + RoHS	RTCC, -40 TO 85DEG C ROHS COMPLIANT: YES RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.20 10+ $3.77 25+ $3.57 50+ $3.34 100+ $3.09 250+ $2.94 500+ $2.63 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	RTCC	2.7V	5.5V	MSOP	10Pins	I2C	-40°C	85°C	-	-

M41T56M6F	03AJ2373 Data Sheet + RoHS	REAL TIME CLOCK/CALENDAR, BINARY, SOIC-8 STMICROELECTRONICS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.81 10+ $3.43 25+ $3.23 50+ $3.02 100+ $2.81 250+ $2.66 500+ $2.39 1000+ $2.04 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	DD:MM:YYYY	ss:mm:hh	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

DS1340C-33#T&R	68AH9621 Data Sheet + RoHS Date/Lot Code	RTCC, -40 TO 85DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $7.37 10+ $6.67 25+ $6.36 50+ $5.95 100+ $5.53 250+ $5.27 500+ $4.81 1000+ $4.64 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	RTCC	2.97V	5.5V	WSOIC	16Pins	I2C	-40°C	85°C	-	-

MAX31328NELB+	31AJ5620 Data Sheet + RoHS	REAL TIME CLOCK, -40 TO 85DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $4.89 10+ $4.39 25+ $4.15 50+ $3.88 100+ $3.60 250+ $3.41 980+ $3.06 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	12Hr / 24Hr	Alarm RTC	2.3V	5.5V	LGA	10Pins	I2C	-40°C	85°C	-	-

CDP68HC68T1M2Z	24M1001 Data Sheet + RoHS	IC, RTC, SMD, 68HC68, SOIC16 RENESAS You previously purchased this product. View in Order History		Each	1+ $21.40 10+ $19.67 25+ $18.85 50+ $17.73 100+ $16.61 250+ $15.79 960+ $14.77 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	3V	6V	SOIC	16Pins	SPI	-40°C	85°C	-	-

MAX31329ELB+	68AJ1784 Data Sheet + RoHS	REAL TIME CLOCK, -40 TO 85DEG C ROHS COMPLIANT: YES ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $3.73 10+ $2.75 25+ $2.70 50+ $2.66 100+ $2.61 250+ $2.35 980+ $2.34 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	Alarm RTC	1.6V	5.5V	LGA	10Pins	I2C	-40°C	85°C	-	-

PCF2131TFY	99AJ4767 Data Sheet + RoHS	REAL TIME CLOCK, -40 TO 85DEG C ROHS COMPLIANT: YES NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.83 10+ $3.25 25+ $3.11 50+ $2.96 100+ $2.82 250+ $2.67 500+ $2.45 1000+ $2.06 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-DD	HH:MM:SS:hh	RTC	1.2V	5.5V	HLSON	16Pins	I2C, SPI	-40°C	85°C	-	AEC-Q100

DS1305N+	73Y1202 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), SPI, 2 V to 5.5 V, DIP-16 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $8.79 10+ $7.95 25+ $7.64 50+ $7.18 100+ $6.71 250+ $6.27 500+ $5.72 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	2V	5.5V	DIP	16Pins	SPI	-40°C	85°C	-	-

DS1337+	75Y6246 Data Sheet + RoHS	RTC, SERIAL ALARM, LOW POWER, 1337 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $4.28 10+ $3.85 25+ $3.64 50+ $3.40 100+ $3.15 250+ $2.99 500+ $2.68 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	1.8V	5.5V	DIP	8Pins	I2C, Serial	-40°C	85°C	-	-

DS1337U+	75Y6247 Data Sheet + RoHS Date/Lot Code	IC, RTC, I2C, SMD, 1337, MSOP8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $4.09 10+ $3.68 25+ $3.48 50+ $3.24 100+ $3.01 250+ $2.86 500+ $2.56 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	1.8V	5.5V	MSOP	8Pins	I2C	-40°C	85°C	-	-

DS1672U-33+	73Y1321 Data Sheet + RoHS Date/Lot Code	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+ $1.48 10+ $1.48 25+ $1.48 50+ $1.48 100+ $1.48 250+ $1.48 500+ $1.48 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Binary	Binary	RTC	2.97V	3.63V	µSOP	8Pins	I2C	-40°C	85°C	-	-

DS1307N+	73Y1207 Data Sheet + RoHS Date/Lot Code	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 4.5 V to 5.5 V, DIP-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.62 10+ $4.77 25+ $4.56 50+ $4.35 100+ $4.13 250+ $3.92 500+ $3.60 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	DIP	8Pins	I2C	-40°C	85°C	-	-