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 (GBP) 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 3V/5V Real-Time Clock
Datasheet
270On Order
Min.: 1
Mult.: 1

Multiplexed YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 242 B TSSOP-24 Backup Switching 4.5 V 5.5 V 0 C + 70 C DS1685E SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock 1-Wire Time Chip With Interrupt
Datasheet
718Expected 24/03/2026
Min.: 1
Mult.: 1

Serial 1-Wire Binary Binary 4 B TSOC-6 Backup Switching 2.2 V 6 V - 40 C + 85 C DS2417P SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock 3.5ppm, I2C RTC with Integrated Crystal and Power Management
Datasheet
3,428On Order
Min.: 1
Mult.: 1

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) LGA-10 Backup Switching 2.3 V 5.5 V - 40 C + 85 C MAX31328 SMD/SMT Tray
ABRACON Real Time Clock AECQ-200 IC RTC Ultra small Low Power CLK/CALENDAR I2C MODULE 2012
Datasheet
1,000Expected 12/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C DFN-8 Integrated Battery 900 mV 5.5 V - 40 C + 85 C AB-RTC-XPA-32.768kHz-2 SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock IC RTC Ultra small Low Power CLK/CALENDAR I2C MODULE 3215
Datasheet
1,000Expected 17/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C HH:MM:SS (24 hr) SON-8 No Backup Switching 900 mV 5.5 V - 40 C + 85 C AB-RTC-XL SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock AECQ-200 IC RTC Ultra small Low Power CLK/CALENDAR I2C MODULE 3215
Datasheet
1,000Expected 17/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C HH:MM:SS (24 hr) SON-8 No Backup Switching 900 mV 5.5 V - 40 C + 85 C AB-RTC-XLA SMD/SMT Reel, Cut Tape, MouseReel
ABRACON Real Time Clock IC RTC Ultra small Low Power CLK/CALENDAR I2C MODULE 2012
Datasheet
1,000Expected 12/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C DFN-8 Integrated Battery 900 mV 5.5 V - 40 C + 85 C AB-RTC-XP-32.768kHz-2 SMD/SMT Reel, Cut Tape, MouseReel
Nisshinbo Real Time Clock 2-Wire Real Time Clock IC
2,000Expected 27/02/2026
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) TSSOP-10 No Backup Switching 1.5 V 5.5 V - 40 C + 85 C R2223T SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock 4096k NV SRAM with Phantom Clock
Datasheet
32Expected 02/04/2026
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 512 kB PowerCap Module-34 Backup Switching 2.97 V 3.63 V 0 C + 70 C DS1251WP SMD/SMT Tray
Analog Devices / Maxim Integrated Real Time Clock Low Current Real Time Clock with I2C Int
Datasheet
3,365Expected 13/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) 64 B Backup Switching 1.6 V 3.6 V - 40 C + 85 C MAX31341 SMD/SMT Reel, Cut Tape, MouseReel
Renesas / Intersil Real Time Clock REAL TIME CLK/CLNDR W/TEMP COMP 8 L
Datasheet
2,940Expected 27/04/2026
Min.: 1
Mult.: 1

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) 128 B SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12022 SMD/SMT Tube
Renesas / Intersil Real Time Clock REAL TIME CLK ENHANC CD ESD & MOISTURESIS
Datasheet
760Expected 08/07/2026
Min.: 1
Mult.: 1

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) 128 B SOIC-20 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12022 SMD/SMT Tube
Microchip Technology Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-64
Datasheet
600On Order
Min.: 1
Mult.: 1

SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 64 B MSOP-10 Backup Switching 1.8 V 3.6 V - 40 C + 85 C SMD/SMT Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current, I C, Serial Real-Time Clock
Datasheet
197Expected 06/03/2026
Min.: 1
Mult.: 1

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) uSOP-8 Backup Switching 1.71 V 5.5 V - 40 C + 85 C DS1339AU SMD/SMT Tube
Analog Devices / Maxim Integrated Real Time Clock I C RTC/Supervisor with Trickle Charger
Datasheet
200Expected 20/04/2026
Min.: 1
Mult.: 1

I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 512 B SOIC-8 Backup Switching 4.5 V 5.5 V - 40 C + 85 C DS1388Z SMD/SMT Tube
Renesas Electronics Real Time Clock RTC I2c Serial IC 1.8 to 5.5V 32kHz
Datasheet
66On Order
Min.: 1
Mult.: 1

MSOP-8 1337AGD SMD/SMT Tube
STMicroelectronics Real Time Clock 256K (32Kx8) 70ns
Datasheet
54In 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 4.5 V 5.5 V 0 C + 70 C M48T37Y SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX4111CE:A3 REAL TIME CLOCK SPI-BUS 3.0V 11.5PPM 250TR
Datasheet
7,241On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 4-Wire, SPI Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX4111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock 32.768KHz 3.0Volts 5+/-5ppm -40C +85C
Datasheet
710On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

I2C YY-MM-DD-dd HH:MM:SS (24 hr) SOP-14 No Backup Switching 1.7 V 5.5 V - 40 C + 85 C RX-8025SA SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock 3.0Volt -40 to 85C I2C BUS
Datasheet
500Expected 09/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

I2C YY-MM-DD-dd HH:MM:SS (24 hr) VSOJ-12 Backup Switching 2.4 V 5.5 V - 40 C + 85 C RX-8035LC SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX4901CE XB C0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-5ppm 2k TR
Datasheet
1,169Expected 09/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 256 B Backup Switching 1.6 V 5.5 V - 40 C + 105 C RX4901CE SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock REAL TIME CLOCK 3.0V 5+/-23PPM 1K TR
Datasheet
2,000Expected 09/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

Serial, I2C, SPI YY-MM-DD-dd HH:MM:SS (24 hr) 16 B Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX6110SA SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock I2C-BUS RTC +/-5.0PPM-40 85C 10 PIN 1K T/R
Datasheet
1,967Expected 15/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 2.5 V 5.5 V - 40 C + 85 C RX8900CE SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock 32.768kHz-DTCXO 3.4ppm I2C-Bus
Datasheet
263Expected 30/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 2.5 V 5.5 V - 40 C + 85 C RX8900SA SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock 256k NV SRAM with Phantom Clock
Datasheet
896Factory Stock Available
More Info Available
Min.: 24
Mult.: 12

Phantom Clock YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 256 kB EDIP-28 Integrated Battery 3.3 V 5 V 0 C + 70 C DS1244W Through Hole Tube