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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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DS12885+	73Y1189 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, DIP-24 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $9.39 10+ $8.49 32+ $7.02 64+ $6.92 112+ $6.80 256+ $6.70 512+ $6.11 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	DIP	24Pins	Multiplexed	0°C	70°C	-	-
X1B0003110001	48Y4769 Data Sheet + RoHS	RTC, 32.768KHZ, I2C, SMD EPSON You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $2.05 10+ $1.96 25+ $1.81 50+ $1.63 100+ $1.46 250+ $1.28 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	-	-	RTC	1.25V	5V	-	10Pins	I2C	-40°C	85°C	-	-
DS1904L-F5#	22AC2963 Data Sheet + RoHS	RTC IBUTTON, F5 MICRO CAN ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $12.09 10+ $11.15 25+ $10.80 50+ $10.77 100+ $9.57 300+ $9.18 500+ $9.04 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Binary	Binary	RTC	2.8V	6V	-	2Pins	Serial	-40°C	70°C	-	-
MCP7940N-E/SN	72AC6176 Data Sheet + RoHS	RTCC, -40 TO 125DEG C, SOIC-8 MICROCHIP You previously purchased this product. View in Order History		Each	1+ $0.938 10+ $0.903 25+ $0.867 50+ $0.848 100+ $0.828	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Day; Date; Month; Year	HH:MM:SS	RTCC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	125°C	-	-
ISL12057IBZ-T	84AC6857 Data Sheet + RoHS	RTC, Alarm, Date Time Format (Day/Date/Month/Year, HH:MM:SS), I2C, 1.4V to 3.6V Supply, NSOIC-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: 100) Add	Day; Date; Month; Year	HH:MM:SS	Alarm RTC	1.4	3.6	NSOIC	8	I2C	-40	85	-888	-888

M41T94MQ6F	45AC7419 Data Sheet + RoHS	RTC, Day/Date/Month/Year/Century, HH:MM:SS:hh, Alarm RTC, SPI, 2.7 V to 5.5 V Supply, SOIC-16 STMICROELECTRONICS You previously purchased this product. View in Order History		Each	1+ $5.77 10+ $5.23 25+ $4.96 50+ $4.67 100+ $4.36 250+ $4.17 500+ $3.78 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	SOIC	16	SPI	-40	85	-888	-888

ISL12022MAIBZ	94AC1624 Data Sheet + RoHS	RTC/CALENDAR, I2C, TEMP SENS, 20SOIC RENESAS You previously purchased this product. View in Order History		Each	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 Add	YY-MM-DD-dd	HH:MM:SS	RTC	2.7V	5.5V	SOIC	20Pins	I2C	-40°C	85°C	-	-

MCP7940MT-I/SN	65AC3855 Data Sheet + RoHS	REAL TIME CLOCK W/ SRAM, 64B, SOIC-8 MICROCHIP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $0.683 10+ $0.658 25+ $0.632	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	SOIC	8Pins	I2C	-40°C	85°C	-	-

MCP79412-I/SN	94T5863 Data Sheet + RoHS	RTCC, YYYY:MM:WK:DD:HR:MIN:SECSHH:MM:SS MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.35 10+ $1.31 25+ $1.27 50+ $1.25 100+ $1.22	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	YYYY:MM:WK:DD:Hr:Min:Secs	HH:MM:SS	Calendar, Clock	1.8	5.5	SOIC	8	I2C	-40	85	-	AEC-Q100

DS1347T+T&R	73Y1247 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year/Century hh:mm:ss), SPI, 2 V to 5.5 V, TDFN-8 ANALOG DEVICES You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $4.13 10+ $3.72 25+ $3.52 50+ $3.28 100+ $3.05 250+ $2.90 500+ $2.59 1000+ $2.35 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; Century	HH:MM:SS	Alarm RTC	2V	5.5V	TDFN	8Pins	SPI	-40°C	85°C	-	-

MCP79402-I/SN	12X8721 Data Sheet + RoHS	RTCC, GP I2C, 64B SRAM, ID, 8SOIC 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	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

MCP79511-I/MS	12X8726 Data Sheet + RoHS	RTCC, SPI, 1KB EE, 64B SRAM, MSOP-10 MICROCHIP You previously purchased this product. View in Order History		Each	1+ $1.42 10+ $1.37 25+ $1.31 50+ $1.28 100+ $1.24	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	YYYY:MM:WK:DD:Hr:Min:Secs	12Hr / 24Hr	Alarm RTC	1.8V	3.6V	MSOP	10Pins	SPI	-40°C	85°C	-	AEC-Q100

DS1338U-33+T&R	73Y1222 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		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	3V	5.5V	µSOP	8Pins	I2C	-40°C	85°C	-	-

DS1687-5+	73Y1334 Data Sheet + RoHS Date/Lot Code	Alarm RTC IC, Day/Date/Month/Year/Century hh:mm:ss, Multiplexed, 4.5 V to 5.5 V, EDIP-24 ANALOG DEVICES You previously purchased this product. View in Order History	View Additional Avnet Stock	Each	1+ $18.83 10+ $17.29 28+ $16.92 56+ $16.55 112+ $15.56 252+ $14.55 504+ $13.82 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	Alarm RTC	4.5V	5.5V	-	24Pins	Multiplexed	0°C	70°C	-	-

PCA85063ATT/AJ	61AC1224 Data Sheet + RoHS Date/Lot Code	CLOCK/CALENDAR, AEC-Q100, I2C, TSSOP-8 NXP You previously purchased this product. View in Order History	View Additional Avnet Stock	Each (Supplied on Cut Tape)	1+ $1.63 10+ $1.47 25+ $1.38 50+ $1.28 100+ $1.17 250+ $1.10 500+ $0.966 1000+ $0.801 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	1.8V	5.5V	TSSOP	8Pins	I2C	-40°C	105°C	-	AEC-Q100

M41ST87WMX6TR	45AC7402 Data Sheet + RoHS	RTC, Day/Date/Month/Year/Century, HH:MM:SS:hh, Alarm RTC, I2C, 3 V to 3.6 V Supply, SOIC-28 STMICROELECTRONICS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $11.88 10+ $10.83 25+ $10.37 50+ $9.76 100+ $9.15 250+ $8.78 500+ $8.10 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:hh	Alarm RTC	3	3.6	SOIC	28	I2C	-40	85	-888	-888

DS1305E+	14AC3757 Data Sheet + RoHS Date/Lot Code	RTC, Format (Day/Date/Month/Year/12Hr/24Hr), 3 Wire, Serial, 2V to 5.5V Supply, TSSOP-20 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $7.01 10+ $6.33 25+ $5.87 50+ $5.44 148+ $5.01 296+ $4.78 518+ $4.56 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	TSSOP	20Pins	SPI	0°C	70°C	-	-

DS1374C-33#	14AC3760 Data Sheet + RoHS Date/Lot Code	RTC, -40 TO 85DEG C ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $8.31 10+ $7.51 25+ $7.16 92+ $6.69 138+ $6.21 276+ $5.94 506+ $5.42 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	Binary	Binary	RTC	2.97V	5.5V	SOIC	16Pins	I2C	-40°C	85°C	-	-

DS1678S+	81Y9059 Data Sheet + RoHS	RTC, EVENT REC, 16BIT ETC, 8SOIC ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $9.22 10+ $8.33 25+ $7.95 50+ $7.42 176+ $6.90 264+ $6.59 528+ $6.01 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add	YY-MM-DD-dd	HH:MM:SS	RTC	4.5V	5.5V	SOIC	8Pins	I2C	-40°C	85°C	-	-

PCF85263ATL/AX	31AC6852 Data Sheet + RoHS	RTC, Clock/Calendar, Date Time Format (YYYY-MM-DD-dd, HH:MM:SS) I2C, 0.9V to 5.5V, DFN2626-10 NXP You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $1.30 10+ $1.11 25+ $1.02 50+ $0.935 100+ $0.847 250+ $0.798 500+ $0.749 1000+ $0.591 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	900	5.5	DFN	10	I2C	-40	85	-888	-888

M41T93ZMY6F	07AH6824 Data Sheet + RoHS	RTC, -40 TO 85DEG C, SOIC-18 STMICROELECTRONICS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $6.11 10+ $5.49 25+ $5.19 50+ $4.85 100+ $4.50 250+ $4.26 500+ $3.83 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	2.38V	5.5V	SOIC	18Pins	SPI	-40°C	85°C	-	-

1339-31DVGI8	85AJ6767 Data Sheet + RoHS	REAL TIME CLOCK, -40 TO 85DEG C ROHS COMPLIANT: YES RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.25 10+ $2.76 25+ $2.64 50+ $2.52 100+ $2.40 250+ $2.27 500+ $2.04 1000+ $1.72 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; Century	HH:MM:SS: 12Hr / 24Hr	Alarm RTC	3.3V	5.5V	TSSOP	8Pins	I2C	-40°C	85°C	-	-

ISL1208IU8Z-TK	85AJ2992 Data Sheet + RoHS Date/Lot Code	REAL TIME CLOCK, -40 TO 85DEG C ROHS COMPLIANT: YES RENESAS You previously purchased this product. View in Order History		Each (Supplied on Cut Tape)	1+ $3.68 10+ $3.32 25+ $3.13 50+ $2.92 100+ $2.71 250+ $2.57 500+ $2.31 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	MSOP	8Pins	I2C	-40°C	85°C	-	-

BQ32000D	26AJ5261 + RoHS Date/Lot Code	SERIAL RTC - NYX TEXAS INSTRUMENTS You previously purchased this product. View in Order History		Each	1+ $2.13 10+ $1.98 25+ $1.85 50+ $1.76 150+ $1.66 300+ $1.58 525+ $1.55 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	3.6V	SOIC	8Pins	I2C	-40°C	85°C	-	-

DS12885QN+	73Y1192 Data Sheet + RoHS	Alarm RTC IC, Date Time Format (Day/Date/Month/Year hh:mm:ss), Multiplexed, 4.5 V to 5.5 V, PLCC-28 ANALOG DEVICES You previously purchased this product. View in Order History		Each	1+ $11.65 10+ $10.53 25+ $10.03 78+ $9.37 117+ $8.71 273+ $8.32 507+ $7.59 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	Alarm RTC	4.5V	5.5V	-	28Pins	Multiplexed	-40°C	85°C	-	-