Real Time Clock

Real Time Clock
Real Time Clocks (RTCs) are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many real time clock manufacturers including Analog Devices, Epson, Microchip, Micro Crystal, NXP, Renesas Electronics, STMicroelectronics & more. Please view our large selection of real time clocks below.
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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
RTC Memory Size
Package/Case
Battery Backup Switching
Supply Voltage - Min
Supply Voltage - Max
Minimum Operating Temperature
Maximum Operating Temperature
Series
Mounting Style
Qualification
Packaging
Analog Devices / Maxim Integrated Real Time Clock Extremely Accurate SPI Bus RTC with Inte
Datasheet
1.970In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 256 B SO-20 Backup Switching 2 V 5.5 V - 40 C + 85 C DS3234SN SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock RTC IC with 400 kHz I2C interface featuring 128 byte SRAM in HVSON12 package.
Datasheet
4.310In Stock
6.000Expected 14/12/2026
Min.: 1
Mult.: 1
Reel: 6.000

PCF85053A Reel, Cut Tape
Micro Crystal Real Time Clock 32.768 kHz +/-3 PPM I2C -40/+85C
Datasheet
16.297In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) No Backup Switching 1.5 V 5.5 V - 40 C + 85 C RV-8803-C7 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial SPI bus RTC
Datasheet
4.721In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 32 B SOX-18 Backup Switching 2.7 V 5.5 V - 40 C + 85 C M41T93 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial 512 (64x8)
Datasheet
2.614In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 936

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 64 B SOX-28 Backup Switching 2.7 V 5.5 V - 40 C + 85 C M41T94 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock 64K (8Kx8) 100ns
Datasheet
1.010In Stock
720Expected 17/02/2026
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 8 kB PCDIP-28 Integrated Battery 4.75 V 5.5 V 0 C + 70 C M48T08 Through Hole Tube
STMicroelectronics Real Time Clock 16K (2Kx8) 150ns
Datasheet
545In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 8 kB PCDIP-24 Integrated Battery 4.5 V 5.5 V 0 C + 70 C M48T12 Through Hole Tube

STMicroelectronics Real Time Clock 256K (32Kx8) 70ns
Datasheet
2.025In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 936

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 256 kB SOX-28 Backup Switching 4.5 V 5.5 V 0 C + 70 C M48T35Y SMD/SMT Reel, Cut Tape, MouseReel
ABLIC Real Time Clock 3WIRE REAL TIME CLCK
Datasheet
4.827In Stock
Min.: 1
Mult.: 1
Reel: 5.000

SNT-A-8 S-35192 Reel, Cut Tape
Analog Devices / Maxim Integrated Real Time Clock Real-Time Clocks
Datasheet
1.248In Stock
1.302Expected 23/02/2026
Min.: 1
Mult.: 1

Multiplexed YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 114 B EDIP-24 Integrated Battery 4.5 V 5.5 V 0 C + 70 C DS12887 Through Hole Tube
Analog Devices / Maxim Integrated Real Time Clock Low-Voltage SPI/3-Wire RTCs with Trickle
Datasheet
7.806In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-10 Backup Switching 2.97 V 5.5 V - 40 C + 85 C DS1391U SMD/SMT Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Real Time Clock 1-Wire Time Chip With Interrupt
Datasheet
5.648In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Serial 1-Wire Binary Binary 4 B Backup Switching 2.5 V 5.5 V - 40 C + 85 C DS2417P SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock RTC Module with I2C or SPI interface featuring backup battery switch-over function in HLSON16 package.
Datasheet
12.017In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Serial, I2C, SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) Backup Switching 1.2 V 5.5 V - 40 C + 85 C PCF2131 SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
80.986In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) HWSON-8 No Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85063TP SMD/SMT Reel, Cut Tape, MouseReel

NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
165.643In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SO-8 Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85263A SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
86.703In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 64 B DFN2626-10 Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85363A SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock 32.768 KHZ
Datasheet
13.891In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 256 B QFN-16 Backup Switching 1.7 V 3.6 V - 40 C + 85 C AB18x5 SMD/SMT Reel, Cut Tape, MouseReel
Renesas / Intersil Real Time Clock REAL TIME CLK W/ ALARM DS1337 COMP
Datasheet
12.758In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

I2C YY-MM-DD-dd HH:MM:SS (24 hr) SOIC-8 No Backup Switching 1.8 V 3.6 V - 40 C + 85 C ISL12057 SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated MAX31331TETB+T
Analog Devices / Maxim Integrated Real Time Clock Ultra-Low power 12C Real Time clock w/ p
Datasheet
1.679In Stock
2.500Expected 03/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

Reel, Cut Tape, MouseReel

Analog Devices / Maxim Integrated Real Time Clock Ultra-Low power RTC w/ integrated power
Datasheet
1.803In Stock
Min.: 1
Mult.: 1
Reel: 2.500

MAX31334 Reel, Cut Tape
Micro Crystal Real Time Clock 32.768 kHz +/-20 PPM SPI -40/+85C
Datasheet
7.947In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

Serial, I2C, SPI YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 900 mV 5.5 V - 40 C + 85 C RV-8063-C7 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock 32.768kHz SPI Time Acc. 25ppm
Datasheet
737In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

SPI YY-MM-DD-dd HH:MM:SS (24 hr) 8 B Backup Switching 1.3 V 5.5 V - 40 C + 85 C RV-3149 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock 32.768kHz I2C Time Acc. 25ppm
Datasheet
2.899In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 8 B Backup Switching 1.3 V 5.5 V - 40 C + 85 C RV-3129 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock 32.768kHz I2C Time Acc. 25ppm AEC
Datasheet
2.218In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 8 B Backup Switching 1.3 V 5.5 V - 40 C + 125 C RV-3129 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock 32.768kHz SPI Time Acc. 6ppm AEC
Datasheet
1.447In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

SPI YY-MM-DD-dd HH:MM:SS (24 hr) 8 B Backup Switching 1.3 V 5.5 V - 40 C + 125 C RV-3149 SMD/SMT Reel, Cut Tape, MouseReel