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 (IDR) 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 32.768kHz-DTCXO 3.4ppm I2C-Bus
Datasheet
Product Comments
1.087In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 250

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
Nisshinbo Real Time Clock 2-Wire Real Time Clock IC
Datasheet
79In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) QFN023023-16 Backup Switching 750 mV 5.5 V - 40 C + 85 C R2051L SMD/SMT Reel, Cut Tape, MouseReel

Renesas / Intersil Real Time Clock PERI SPIAL-TIME-CLK
Datasheet
12In Stock
480Expected 28/07/2026
Min.: 1
Mult.: 1

Serial 3-Wire, SPI YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) 32 B SOIC-16 Backup Switching 3 V 6 V - 40 C + 85 C CDP68HC68T1 SMD/SMT Tube
Renesas / Intersil Real Time Clock REAL TIME CLK/CLNDR W/EEPROM IN 8LD W
Datasheet
94In Stock
Min.: 1
Mult.: 1

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 512 B SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12026 SMD/SMT Tube
Renesas / Intersil Real Time Clock REAL TIME CLK/CLNDR W/EEPROM IN 8LD
Datasheet
531In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

I2C YY-MM-DD-dd HH:MM:SS (24 hr) 512 B SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12026 SMD/SMT Reel, Cut Tape, MouseReel

Epson Timing Real Time Clock RX4111CE:B6 REAL TIME CLOCK SPI-BUS 3.0V 23PPM 2K TR
Datasheet
245In Stock
2.000Expected 02/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

Serial 4-Wire, SPI Backup Switching 1.6 V 5.5 V - 40 C + 85 C RTC SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock RX4901CE XB B0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-5ppm 2k TR
Datasheet
2.000In Stock
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 RX4901CE XB D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-5ppm 2k TR
Datasheet
972In Stock
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 RX4901CE XS B0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-3ppm 2k TR
Datasheet
1.890In Stock
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 RX4901CE XS C0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-3ppm 2k TR
Datasheet
1.584In Stock
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 RX4901CE XS D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-3ppm 2k TR
Datasheet
1.922In Stock
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 RX8804CE:XB0 REAL TIME CLOCK +/-5.0PPM DTCXO 1K TR
Datasheet
625In Stock
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 + 105 C SMD/SMT Reel, Cut Tape
Epson Timing Real Time Clock RX8901CE:XB A0 REAL TIME CLOCK MODULE I2C-Bus 3.0V +/-5ppm 2k TR
Datasheet
559In Stock
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
ECS Real Time Clock Low Power High Stability +/-5 ppm -40 - +85C IC Real Time Clock 3.2 x 2.5 mm
Datasheet
1.027In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

I2C YY-MM-DD HH:MM:SS (24 hr) Backup Switching 1.6 V 5 V - 40 C + 85 C SMD/SMT Reel, Cut Tape, MouseReel
Texas Instruments Real Time Clock Parallel RTC A 595-B Q4802LYPW A 595-BQ4 A 595-BQ4802LYPW
Datasheet
47In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 16 B TSSOP-28 Backup Switching 2.7 V 3.6 V 0 C + 70 C BQ4802LY SMD/SMT Reel, Cut Tape, MouseReel
Texas Instruments Real Time Clock Parallel RTC A 595-B Q4802YDWR A 595-BQ4 A 595-BQ4802YDWR
Datasheet
5In Stock
Min.: 1
Mult.: 1

Parallel YY-MM-DD-dd HH:MM:SS (24 hr) 16 B SOIC-28 Backup Switching 4.5 V 5.5 V 0 C + 70 C BQ4802Y SMD/SMT Tube

ABLIC Real Time Clock 3-Wire 1.3-5.5V
Datasheet
220In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

Serial 3-Wire YY-MM-DD-dd HH:MM:SS (24 hr) TSSOP-8 Backup Switching 1.3 V 5.5 V - 40 C + 85 C S-35190 SMD/SMT Reel, Cut Tape, MouseReel
Epson Timing Real Time Clock I2C Bus 5 +/-23ppm
Datasheet
637In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

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 REAL TIME CLOCK 0+/-5PPM (SOP 14 PIN) 1K TR
Datasheet
666In Stock
Min.: 1
Mult.: 1
Reel: 1.000
I2C YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 1.7 V 5.5 V - 40 C + 85 C RX-8025SA SMD/SMT Reel, Cut Tape

Epson Timing Real Time Clock 32.768kHz 5ppm I2C-Bus
Datasheet
9.135In Stock
15.000Expected 30/06/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.000

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 RX8130CE:B6 REAL TIME CLOCK +/-23PPM 2K TR
Datasheet
5.354In Stock
38.000Expected 06/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

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 I2C-BUS RTC +/-5.0PPM-40 85C 10 PIN 2K T/R
Datasheet
1.431In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000
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 3.4ppm I2C-Bus
Datasheet
964In 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 RX8900CE SMD/SMT Reel, Cut Tape, MouseReel
Renesas / Intersil Real Time Clock REAL TIME CLK W/ ALARM & TIMR FUNCTNS
Datasheet
33In Stock
Min.: 1
Mult.: 1

I2C YY-MM-DD-dd HH:MM:SS (24 hr) MSOP-8 No Backup Switching 1.8 V 3.6 V - 40 C + 85 C ISL12058 SMD/SMT Tube

Epson Timing Real Time Clock RX-8803LC:UB PURE SN I2C-BUS RTC +/-5.0PPM-40 85C VSOJ-12 PIN BULK
Datasheet
5In Stock
Min.: 1
Mult.: 1

Serial 2-Wire, 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 Bulk