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 (CAD) 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
STMicroelectronics Real Time Clock 256K (32Kx8) 70ns
Datasheet
192In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 32 kB PCDIP-28 Integrated Battery 4.75 V 5.5 V 0 C + 70 C M48T35 Through Hole Tube
STMicroelectronics Real Time Clock 256K (32Kx8) 70ns
Datasheet
259In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 32 kB PCDIP-28 Integrated Battery 4.5 V 5.5 V 0 C + 70 C M48T35Y Through Hole Tube
STMicroelectronics Real Time Clock 256K (32Kx8) 100ns
Datasheet
374In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 936

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 256 kB SOIC-44 Backup Switching 3 V 3.6 V 0 C + 70 C M48T37V SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock 64K (8Kx8) 70ns
Datasheet
382In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 8 kB PCDIP-28 Integrated Battery 4.5 V 5.5 V 0 C + 70 C M48T58Y Through Hole Tube

Analog Devices / Maxim Integrated Real Time Clock Real-Time Clocks
Datasheet
448In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

Multiplexed YY-MM-DD-dd HH:MM:SS (24 hr) 114 B SO-24 4.5 V 5.5 V 0 C + 70 C DS12885S SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock Real-Time Clocks
Datasheet
225In Stock
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 DS12887A Through Hole Tube
Analog Devices / Maxim Integrated Real Time Clock 256k Nonvolatile, Y2K-Compliant Timekeep
Datasheet
190In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 32 kB EDIP-32 Integrated Battery 4.5 V 5.5 V - 40 C + 85 C DS1554 Through Hole Tube
Analog Devices / Maxim Integrated Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R
Datasheet
154In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 32 kB PowerCap Module-34 Backup Switching 2.97 V 3.63 V 0 C + 70 C DS1744WP Through Hole Tray

Analog Devices / Maxim Integrated Real Time Clock 5ppm, I C Real-Time Clock with SRAM
Datasheet
372In Stock
Min.: 1
Mult.: 1

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 236 B SOIC-8 Backup Switching 2.3 V 4.5 V - 40 C + 85 C DS3232MZ SMD/SMT AEC-Q100 Tube

Analog Devices / Maxim Integrated Real Time Clock 5ppm, I2C Real-Time Clock with Integrated MEMS Oscillator
Datasheet
3,963In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) 64 B WLP-8 Backup Switching 1.6 V 5.5 V - 40 C + 85 C SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Automotive RTC module, featuring I2C or SPI interface in HLSON16 package.
Datasheet
2,766In Stock
4,000Expected 2026-02-16
Min.: 1
Mult.: 1
Reel: 4,000

PCA2131 AEC-Q100 Reel, Cut Tape
NXP Semiconductors Real Time Clock Automotive RTC IC with 400 kHz I2C interface in TSSOP8 package.
Datasheet
7,666In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) TSSOP-8 No Backup Switching 900 mV 5.5 V - 40 C + 105 C PCA85073A SMD/SMT AEC-Q100 Reel, Cut Tape, MouseReel

NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
14,790In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SOIC-8 No Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85063A SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
13,165In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) DFN2626-10 No Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85063A SMD/SMT Reel, Cut Tape, MouseReel

NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
13,715In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) TSSOP-8 No Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85063A SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Low Power Real time clocks
Datasheet
16,969In 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) DFN2626-10 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
12,660In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) TSSOP-8 Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85263A SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock RTC IC with 400 kHz I2C interface featuring backup battery switch-over function in TSSOP10 package.
Datasheet
4,330In 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) TSSOP-10 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
8,426In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 64 B TSSOP-8 Backup Switching 900 mV 5.5 V - 40 C + 85 C PCF85363A SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock Binary I2C 1-5V RTC IC
Datasheet
20,870In 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 5.5 V - 40 C + 85 C PCF8563 SMD/SMT Reel, Cut Tape, MouseReel
NXP Semiconductors Real Time Clock ULTRA LO PWR CLK/CAL RTC IC
Datasheet
62,980In 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 5.5 V - 40 C + 85 C PCF8563 SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock 32.768 KHZ 3-OUTPUT
Datasheet
5,093In 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 AB08x5 SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock 32.768 KHZ
Datasheet
3,253In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SPI 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 AB08x5 SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock 32.768 KHZ
Datasheet
1,620In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

SPI 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
Nisshinbo Real Time Clock 2-Wire Real Time Clock IC
Datasheet
9,018In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 16 B SSOP-10 No Backup Switching 2 V 5.5 V - 40 C + 85 C RV5C387 SMD/SMT Reel, Cut Tape, MouseReel