Real Time Clocks for Thermostats

Real Time Clocks (RTCs) are IC devices that keep track of time. A typical RTC can provide the time of day as well as the date via a serial bus such as I2C or SPI

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Description Datasheet Availability Pricing (DKK) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model RTC Bus Interface
Date Format
Time Format
Package/Case
Battery Backup Switching
Supply Voltage - Min
Supply Voltage - Max
Minimum Operating Temperature
Maximum Operating Temperature
Series
Mounting Style
Time Keeping Current
Packaging
Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
1.309In Stock
44,61 kr.
34,17 kr.
31,48 kr.
28,65 kr.
View
Min.: 1
Mult.: 1
Max.: 1.047
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 2.7 V 3.3 V - 40 C + 85 C DS1339U SMD/SMT Tube
Microchip Technology Real Time Clock I2C GP RTCC 64B SRAM
Datasheet
2.005In Stock
5,77 kr.
5,33 kr.
Min.: 1
Mult.: 1
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) MSOP-8 Backup Switching 1.8 V 5.5 V - 40 C + 85 C SMD/SMT Tube

STMicroelectronics Real Time Clock 128 NVRAM Serial RTC 3.0 to 3.6 Vcc
Datasheet
361In Stock
1.350On Order
Cut Tape
49,83 kr.
38,49 kr.
35,58 kr.
32,53 kr.
Reel
27,90 kr.
View
MouseReel Available
Min.: 1
Mult.: 1
: 1.350
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SSOP-20 Backup Switching 2.7 V 3.6 V - 40 C + 85 C M41ST87W SMD/SMT Reel, Cut Tape, MouseReel
Microchip Technology Real Time Clock I2C GP RTCC 64B SRAM
Datasheet
90In Stock
500Expected 13/10/2026
5,77 kr.
5,33 kr.
Min.: 1
Mult.: 1
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) TSSOP-8 Backup Switching 1.8 V 5.5 V - 40 C + 85 C SMD/SMT Tube
Microchip Technology Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID
Datasheet
507In Stock
6,93 kr.
6,48 kr.
6,42 kr.
Min.: 1
Mult.: 1
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) MSOP-8 Backup Switching 1.8 V 5.5 V - 40 C + 85 C SMD/SMT Tube
Microchip Technology Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM ID
Datasheet
767In Stock
6,93 kr.
6,48 kr.
6,42 kr.
Min.: 1
Mult.: 1
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) TSSOP-8 Backup Switching 1.8 V 5.5 V - 40 C + 85 C SMD/SMT Tube
Texas Instruments Real Time Clock Parallel RTC A 595-B Q4802LYPWR A 595-BQ A 595-BQ4802LYPWR
Datasheet
50In Stock
61,62 kr.
49,83 kr.
42,30 kr.
40,06 kr.
View
Min.: 1
Mult.: 1
Parallel YY-MM-DD-dd HH:MM:SS (24 hr) TSSOP-28 Backup Switching 2.7 V 3.6 V 0 C + 70 C BQ4802LY SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C RTC with 56-Byte NV RAM
Datasheet
410In Stock
39,99 kr.
32,67 kr.
27,75 kr.
27,38 kr.
26,04 kr.
Min.: 1
Mult.: 1
Max.: 328
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 3 V 5.5 V - 40 C + 85 C DS1338U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
818In Stock
45,13 kr.
34,61 kr.
29,39 kr.
29,09 kr.
View
Min.: 1
Mult.: 1
Max.: 654
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1339U SMD/SMT Tube

NXP Semiconductors Real Time Clock RTC IC with 400 kHz I2C interface in TSSOP8 package.
Datasheet
2.392In Stock
15.000On Order
Cut Tape
11,26 kr.
8,21 kr.
7,53 kr.
6,67 kr.
View
Reel
5,62 kr.
MouseReel Available
Min.: 1
Mult.: 1
: 2.500
I2C YY-MM-DD-dd HH:MM:SS (24 hr) TSSOP-8 No Backup Switching 1 V 5.5 V - 40 C + 85 C PCF8563 SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock I C Serial Real-Time Clock
Datasheet
396In Stock
32,23 kr.
24,32 kr.
22,23 kr.
20,07 kr.
19,02 kr.
Min.: 1
Mult.: 1
Max.: 316
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 No Backup Switching 1.8 V 5.5 V - 40 C + 85 C DS1337U SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C RTC with Trickle Charger
Datasheet
119In Stock
42,60 kr.
32,67 kr.
29,91 kr.
Min.: 1
Mult.: 1
Max.: 95
I2C YY-MM-DD-dd HH:MM:SS (24 hr) uSOP-8 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1340U SMD/SMT Tube