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
Epson Timing Real Time Clock RX4111CE:B3 REAL TIME CLOCK SPI-BUS 3.0V 23PPM 250TR
Datasheet
152In Stock
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 REAL TIME CLOCK 3.0V 5+/-23PPM 250TR
Datasheet
234In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

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 RX8111CE:A3 REAL TIME CLOCK I2C-BUS 3.0V 11.5PPM 250TR
Datasheet
299In Stock
500Expected 06/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX8111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX8111CE:B3 REAL TIME CLOCK I2C-BUS 3.0V 23PPM 250TR
Datasheet
363In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX8111CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock 32.768kHz 5ppm I2C-Bus
Datasheet
Product Comments
51In Stock
1,500Expected 02/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.25 V 5.5 V - 40 C + 85 C RX8130CE SMD/SMT Reel, Cut Tape, MouseReel

Epson Timing Real Time Clock RX-8571LC:B0 PURE SN 5+/-23PPM REAL TIME CLOCK
Datasheet
598In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 16 B No Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX-8571LC SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock 5+/-23PPM REAL TIME CLOCK 1K TR
Datasheet
382In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 16 B No Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX-8571SA SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock 1.6-5.5V
Datasheet
7In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

I2C YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 1.6 V 5.5 V - 40 C + 105 C RX8804CE SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock 32.768kHz +/-5ppm -40C +85C
Datasheet
172In Stock
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 RX8900CE SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock 32.768kHz-DTCXO 5ppm I2C-Bus
Datasheet
684In Stock
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 RX8900SA SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock 32.768kHz-DTCXO 5ppm I2C-Bus
Datasheet
117In Stock
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


Epson Timing Real Time Clock 32.768kHz-DTCXO 5ppm I2C-Bus
Datasheet
378In Stock
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
Epson Timing Real Time Clock RX8901CE:XB A0 REAL TIME CLOCK MODULE I2C-Bus 3.0V +/-5ppm 2k TR
Datasheet
9In Stock
4,000Expected 06/07/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 105 C RX8901CE SMD/SMT Reel, Cut Tape, MouseReel


Epson Timing Real Time Clock I2C-BUS RTC +/-5.0PPM-30 70C SOP-14 PIN BULK
Datasheet
99In Stock
Min.: 1
Mult.: 1
RX8900SA Bulk
Micro Crystal Real Time Clock 32.768kHz I2C Time Acc. 6ppm AEC
Datasheet
10,155On Order
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
Epson Timing RX-4035SA:B PURE SN
Epson Timing Real Time Clock REAL TIME CLOCK 5+/-23PPM STICK
Datasheet
13In Stock
Min.: 1
Mult.: 1

SPI Backup Switching 2.4 V 5.5 V - 40 C + 85 C RX-4035SA SMD/SMT Tube
Epson Timing RX8111CE A0
Epson Timing Real Time Clock RX8111CE:A0 REAL TIME CLOCK I2C-BUS 3.0V 11.5PPM 1K TR
Datasheet
1,337In Stock
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RTC SMD/SMT Reel, Cut Tape
Epson Timing RX8111CE B0
Epson Timing Real Time Clock RX8111CE:B0 REAL TIME CLOCK I2C-BUS 3.0V 23PPM 1K TR
Datasheet
67In Stock
1,000Expected 02/03/2026
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 85 C RTC SMD/SMT Reel, Cut Tape
Analog Devices / Maxim Integrated Real Time Clock 64k NV SRAM with Phantom Clock
Datasheet
1,046Expected 27/04/2026
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 8 kB EDIP-28 Integrated Battery 4.5 V 5.5 V 0 C + 70 C DS1243Y Through Hole Tube

Analog Devices / Maxim Integrated Real Time Clock Low-Current I C RTCs for High-ESR Crystals
Datasheet
5,832Expected 16/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

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 DS1342U SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated Real Time Clock 5ppm, I C Real-Time Clock with SRAM
Datasheet
5,768Expected 08/04/2026
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) 236 B SO-8 Backup Switching 2.3 V 4.5 V - 40 C + 85 C DS3232MZ SMD/SMT Reel, Cut Tape, MouseReel

Epson Timing Real Time Clock I2C-BUS RTC +/-5.0PPM-40 85C VSOJ-12 PIN 1K TR
Datasheet
98In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

I2C YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 1.6 V 5.5 V - 40 C + 85 C RX-8803LC SMD/SMT Reel, Cut Tape, MouseReel
Analog Devices / Maxim Integrated MAX31328NELB+T
Analog Devices / Maxim Integrated Real Time Clock 3.5ppm, I2C RTC with Integrated Crystal and Power Management
Datasheet
4,824Expected 13/04/2026
Min.: 1
Mult.: 1
Reel: 2,500

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 SMD/SMT Reel, Cut Tape
Analog Devices / Maxim Integrated Real Time Clock 4096k NV SRAM with Phantom Clock
Datasheet
100Expected 27/02/2026
Min.: 1
Mult.: 1

Parallel, Phantom Clock YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 4 MB EDIP-32 Integrated Battery 4.5 V 5.5 V 0 C + 70 C DS1251Y Through Hole Tube

Analog Devices / Maxim Integrated Real Time Clock Serial Alarm Real-Time Clock
Datasheet
1,087On Order
Min.: 1
Mult.: 1

Serial 3-Wire, SPI YY-MM-DD HH:MM:SS (24 hr) 96 B DIP-16 Backup Switching 2 V 5.5 V - 40 C + 85 C DS1305N Through Hole Tube