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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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MCP79410-I/ST	75T7447 Data Sheet + RoHS Date/Lot Code	RTCC, 12C, 1K EE, 64B SRAM,8TSSOP MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.53 10+ $1.49 25+ $1.45	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	-	-	RTC	1.8V	5.5V	TSSOP	8Pins	I2C, Serial	-40°C	85°C	-	AEC-Q100
PCF85063TP/1Z	68X3135 Data Sheet + RoHS	RTC, -40 TO 85DEG C, HWSON-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.48 10+ $1.32 25+ $1.26 50+ $1.14 100+ $1.03 250+ $0.961 500+ $0.848 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	900mV	5.5V	HWSON	8Pins	I2C	-40°C	85°C	-	-
DS3231MZ+	73Y1624 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, 2.3 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $14.31 10+ $13.45 25+ $12.60 50+ $11.76 100+ $10.93 300+ $10.22 500+ $9.51 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	2.3V	5.5V	NSOIC	8Pins	I2C	-40°C	85°C	-	-
DS1307+	73Y1206 Data Sheet + RoHS Date/Lot Code	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), I2C, Serial, 4.5 V to 5.5 V, DIP-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $7.57 10+ $6.79 25+ $6.41 50+ $5.98 100+ $5.55 250+ $5.26 500+ $4.73 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	4.5V	5.5V	DIP	8Pins	I2C, Serial	0°C	70°C	-	-
PCF8563TS/4,118	52X6198 Data Sheet Data Sheet + RoHS Date/Lot Code	Real Time Clock/Calendar IC, Alarm, I2C, HH:MM:SS, Day; Date; Month; Year, 1 V to 5.5 V, TSSOP-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.95 10+ $2.66 25+ $2.51 50+ $2.33 100+ $2.14 250+ $2.01 500+ $1.76 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	1V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-

DS12C887+	73Y1079 Data Sheet + RoHS Date/Lot Code	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+ $12.64 10+ $11.67 28+ $11.67 56+ $11.67 112+ $11.67 252+ $11.67 504+ $11.67 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	-	24Pins	Multiplexed	0°C	70°C	-	-

DS1244Y-70+	73Y1160 Data Sheet + RoHS Date/Lot Code	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss:hh), Parallel, 4.5 V to 5.5 V, EDIP-28 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $50.18 5+ $48.36 10+ $46.54 36+ $44.87 60+ $43.76 108+ $43.00 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	4.5V	5.5V	-	28Pins	Parallel	0°C	70°C	-	-

PCF8523TK/1,118	68X3136 Data Sheet Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YYYY-MM-DD-dd, HH:MM:SS) I2C, 1.2V to 5.5V, HVSON-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.66 10+ $2.38 25+ $2.26 50+ $2.09 100+ $1.92 250+ $1.81 500+ $1.57 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	1.2V	5.5V	HVSON	8Pins	I2C	-40°C	85°C	-	-

MCP7940N-I/SN	12X8716 Data Sheet + RoHS Date/Lot Code	RTCC, GP I2C, 64B SRAM, 8SOIC MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.21 10+ $1.17 25+ $1.14	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	SOIC	8Pins	I2C	-40°C	85°C	-	AEC-Q100

DS1251Y-70+	73Y1182 Data Sheet + RoHS Date/Lot Code	RTC W/ NVSRAM, 4096KB, HH:MM:SS:HH, EDIP ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $61.28 5+ $59.09 10+ $56.90 30+ $54.87 50+ $53.51 100+ $52.21 250+ $50.46 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	4.5V	5.5V	EDIP	32Pins	Bytewide	0°C	70°C	-	-

DS1302Z+T&R	73Y1199 Data Sheet + RoHS Date/Lot Code	RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Serial, 2 V to 5.5 V, NSOIC-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $6.13 10+ $5.51 25+ $5.20 50+ $4.86 100+ $4.51 250+ $4.29 500+ $3.84 1000+ $3.48 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	HH:MM:SS	RTC	2V	5.5V	NSOIC	8Pins	Serial	0°C	70°C	-	-

DS1372U+	73Y1249 Data Sheet + RoHS Date/Lot Code	Binary Counter IC, Date Time Format (Binary), I2C, 2.4 V to 5.5 V, µSOP-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $5.74 10+ $5.17 25+ $4.90 50+ $4.79 100+ $4.23 250+ $3.62 500+ $3.28 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	-	2.4V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

PCF8523T/1,118	52X6196 Data Sheet + RoHS	ALARM RTC, -40 TO 85DEG C, SOIC-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.28 10+ $2.06 25+ $1.94 50+ $1.80 100+ $1.64 250+ $1.55 500+ $1.36 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	1.2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

DS1243Y-120+	73Y1159 Data Sheet + RoHS	RTC W/ NVSRAM, 64KB, HH:MM:SS:HH, EDIP28 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $43.23 5+ $41.94 10+ $40.65 36+ $39.24 60+ $38.01 108+ $36.14 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	4.5V	5.5V	EDIP	28Pins	Parallel	0°C	70°C	-	-

DS1394U-33+T&R	73Y1268 Data Sheet + RoHS Date/Lot Code	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+ $6.18 10+ $5.54 25+ $5.23 50+ $4.88 100+ $4.54 250+ $4.30 500+ $3.85 1000+ $3.49 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	-	-

DS3231SN#T&R	38AC0956 Data Sheet + RoHS	RTC, Date Time Format (Day; Date; Month; Year, HH:MM:SS), I2C, 2.3V to 5.5V Supply, SOIC-16 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $12.06 10+ $10.87 25+ $10.43 50+ $10.11 100+ $9.01 250+ $8.61 500+ $8.21 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	2.3V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-

DS3234SN#T&R	38AC0959 Data Sheet + RoHS Date/Lot Code	RTC, SERIAL, SPI, 5.5V, SOIC-20 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $12.01 10+ $10.85 25+ $10.43 50+ $10.11 100+ $9.00 250+ $8.58 500+ $7.94 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	-40°C	85°C	-	-

PCF8563T/5,518	31AC6855 Data Sheet + RoHS	ALARM RTC, -40 TO 85DEG C, SOIC-8 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $0.894 10+ $0.894 25+ $0.894 50+ $0.894 100+ $0.818 250+ $0.818 500+ $0.755 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	1V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

M41T0M6F	45AC7403 Data Sheet + RoHS	RTC, Day/Date/Month/Year/Century, HH:MM:SS, RTC, I2C, 2 V to 5.5 V Supply, SOIC-8 STMICROELECTRONICS You previously purchased this product. View in Order History		Each	1+ $4.41 10+ $3.97 100+ $3.26 500+ $2.77 1000+ $2.37	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; Century	HH:MM:SS	RTC	2V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

MCP79410T-I/MNY	55AC2745 Data Sheet + RoHS Date/Lot Code	RTC CLK/CALENDAR, I2C, TDFN-8 MICROCHIP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.60 10+ $1.56 25+ $1.51	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	-	-

DS1339C-33#	14AC3758 Data Sheet + RoHS Date/Lot Code	REAL TIME CLOCK, 3.3V, I2C, SOIC-16 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $10.46 10+ $9.44 25+ $9.01 92+ $8.41 138+ $7.80 276+ $7.47 506+ $6.80 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	-	-

DS3231S#T&R	38AC0955 Data Sheet + RoHS	RTC, I2C, SERIAL, 5.5V, SOIC-16 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each (Supplied on Cut Tape)	1+ $10.44 10+ $9.41 25+ $8.98 50+ $8.90 100+ $7.80 250+ $7.45 500+ $7.13 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	2.3V	5.5V	SOIC	16Pins	I2C	0°C	70°C	-	-

DS3231S#	78Y4800 Data Sheet + RoHS Date/Lot Code	Real Time Clock IC, YY-MM-DD, HH:MM:SS, 2.3 to 5.5 V, WSOIC-16, I2C, 0°C to 70°C ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $14.92 10+ $13.49 25+ $12.85	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	2.3V	5.5V	WSOIC	16Pins	I2C	0°C	70°C	-	-

DS12887A+	79Y4481 Data Sheet + RoHS Date/Lot Code	RTC, Date Time Format (Day/Date/Month/Year HH:MM:SS), Parallel, 4.5V to 5.5 V, EDIP-24 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $16.91 10+ $15.56 28+ $15.22 56+ $14.89	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	4.5V	5.5V	EDIP	24Pins	Bytewide	0°C	70°C	-	-

PCF8563T/F4,118	49AC5010 Data Sheet + RoHS	Real Time Clock/Calendar, 1.8 V to 5.5 V, HH:MM:SS, DD:MM:YY, SOIC-8, -40 °C to 85 °C NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.42 10+ $2.19 25+ $2.06 50+ $1.91 100+ $1.76 250+ $1.64 500+ $1.45 1000+ $1.20 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	Alarm RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-