Real Time Clock

 Real Time Clock
Real Time Clocks are in stock with same-day shipping at Mouser 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.
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Please view our large selection of real time clocks below.
Results: 786
Select Image Part # Mfr. Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity. Qty. RoHS ECAD Model Interface Type Date Format Time Format Package / Case Battery Backup Switching Supply Voltage - Min Supply Voltage - Max Minimum Operating Temperature Maximum Operating Temperature Series Mounting Style Qualification Time Keeping Current Packaging
Micro Crystal Real Time Clock
22,188Expected 11/20/2026
Cut Tape
$1.58
$1.16
$1.05
$0.927
Reel
$0.83
Min.: 1
Mult.: 1
: 1,000
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 900 mV 5.5 V - 40 C + 85 C SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial 64 (8X8)
9,523On Order
Cut Tape
$4.16
$3.14
$2.88
$2.60
Reel
$2.28
Min.: 1
Mult.: 1
: 2,500
Serial 2-Wire, I2C YYYY-MM-DD HH:MM:SS (24 hr) SOIC-8 Backup Switching 2 V 5.5 V - 40 C + 85 C M41T00 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial 512 (64x8)
22,786On Order
Cut Tape
$3.20
$2.43
$2.21
$2.01
Reel
$1.70
Min.: 1
Mult.: 1
: 2,500
I2C YY-MM-DD-dd HH:MM:SS (24 hr) SOIC-8 Backup Switching 4.5 V 5.5 V - 40 C + 85 C M41T56 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial I2C bus RTC
7,500On Order
Cut Tape
$4.35
$3.28
$3.02
$2.73
Reel
$2.34
Min.: 1
Mult.: 1
: 2,500
Serial YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C M41T82 SMD/SMT Reel, Cut Tape, MouseReel

STMicroelectronics Real Time Clock Battery Swtchovr-RTC
19,485On Order
Cut Tape
$4.52
$3.44
$3.13
$2.87
Reel
$2.50
Min.: 1
Mult.: 1
: 1,000
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) QFN-16 Backup Switching 2.7 V 5.5 V - 40 C + 85 C M41T83 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 234In Stock
Cut Tape
$4.51
$3.41
$3.13
$2.83
Reel
$2.36
Min.: 1
Mult.: 1
: 2,000
I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.6 V 5.5 V - 40 C + 105 C RX4901CE SMD/SMT Reel, Cut Tape, MouseReel

Epson Timing Real Time Clock I2C-BUS RTC +/-5.0PPM-40 85C VSOJ-12 PIN 1K TR 8In Stock
Cut Tape
$5.63
$4.29
$3.96
$3.59
Reel
$3.11
Min.: 1
Mult.: 1
: 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
NXP Semiconductors Real Time Clock RTC IC with 400 kHz I2C interface in HWSON8 package.
75,250Expected 3/29/2027
Cut Tape
$0.99
$0.743
$0.65
$0.571
Reel
$0.465
Min.: 1
Mult.: 1
: 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
ABRACON Real Time Clock 32.768 KHZ 3-OUTPUT
11,823Expected 12/28/2026
Cut Tape
$3.40
$2.54
$2.32
$2.09
Reel
$1.60
Min.: 1
Mult.: 1
: 3,000
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) QFN-16 Backup Switching 1.7 V 3.6 V - 40 C + 85 C AB08x5 SMD/SMT Reel, Cut Tape, MouseReel
Renesas / Intersil Real Time Clock REAL TIME CLOCK AND TMP COMP CRYSTL INLD
4,240Expected 3/11/2027
$8.41
$6.39
$5.73
$5.41
Min.: 1
Mult.: 1
I2C YY-MM-DD-dd HH:MM:SS (24 hr) DFN-20 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12020 SMD/SMT Tube
Renesas / Intersil Real Time Clock REAL TIME CLK/CLNDR W/TEMP COMP 8 L
6,360On Order
$5.38
$4.03
$3.73
$3.39
Min.: 1
Mult.: 1
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12022 SMD/SMT Tube
Micro Crystal Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6 AEC-Q200
1,824On Order
Cut Tape
$3.03
$2.26
$2.06
$1.85
Reel
$1.76
Min.: 1
Mult.: 1
: 1,000
I2C YY-MM-DD-dd HH:MM:SS (24 hr) SON-8 Backup Switching 1.1 V 5.5 V - 40 C + 85 C RV-3028-C8 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock RV-3029-C3, Real-Time Clock, I C-bus, B Stability, 25ppm @ -40 to +85C (SMD 3.7 x 2.5 x 0.9)
5,400On Order
Cut Tape
$3.97
$2.99
$2.75
$2.48
$2.45
Reel
$2.07
Min.: 1
Mult.: 1
: 1,000
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.3 V 5.5 V - 40 C + 85 C RV-3029-C3 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock Real Time Clock, automotive grade AEC-Q200
1,000Expected 11/20/2026
Cut Tape
$4.56
$3.44
$3.16
$2.85
$2.82
Reel
$2.38
Min.: 1
Mult.: 1
: 1,000
Serial 2-Wire, I2C YY-MM-DD HH:MM:SS:hh (12 hr, 24 hr) SON-10 Backup Switching 1.3 V 5.5 V - 40 C + 125 C RV-3029-C3 SMD/SMT AEC-Q200 Reel, Cut Tape, MouseReel
ABRACON Real Time Clock RTCs 3725 10-SMD I2C HH:MM:SS (12/24 hr) YY-MM-DD-dd
2,000Expected 5/11/2027
Cut Tape
$9.56
$7.44
$6.91
$6.33
Reel
$5.46
Min.: 1
Mult.: 1
: 1,000
Serial 4-Wire, SPI YY-MM-DD-dd HH:MM:SS (24 hr) Backup Switching 1.1 V 5.5 V - 40 C + 85 C AB-RTCMC SMD/SMT Reel, Cut Tape, MouseReel
Nisshinbo Real Time Clock 2-Wire Real Time Clock IC
1,984Expected 11/20/2026
Cut Tape
$1.64
$1.20
$1.09
$0.961
Reel
$0.79
Min.: 1
Mult.: 1
: 2,000
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SSOP-8 Backup Switching 2 V 6 V - 40 C + 85 C RS5C372 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.7 AEC-Q200
4,000On Order
Cut Tape
$1.58
$1.16
$1.05
$0.924
Reel
$0.833
Min.: 1
Mult.: 1
: 1,000
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SON-8 900 mV 5.5 V - 40 C + 85 C RV-8263-C8 SMD/SMT Reel, Cut Tape, MouseReel
Micro Crystal Real Time Clock
2,000Expected 11/20/2026
$1.70
$1.25
$1.13
$1.01
Min.: 1
Mult.: 1
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) No Backup Switching 900 mV 5.5 V - 40 C + 85 C SMD/SMT
Micro Crystal Real Time Clock RV-8803-C7, Real-Time Clock, I C-bus, 3ppm @ -40 to +85C (SMD 3.2 x 1.5 x 0.8)
4,510On Order
Cut Tape
$3.28
$2.44
$2.23
$2.00
$1.95
Reel
$1.65
Min.: 1
Mult.: 1
: 1,000
RV-8803-C7 SMD/SMT Reel, Cut Tape
Micro Crystal Real Time Clock 32.768kHz I2C 20ppm 2.0x1.2x0.6mm
2,985On Order
Cut Tape
$2.90
$2.16
$1.98
$1.78
Reel
$1.58
Min.: 1
Mult.: 1
: 1,000
I2C YY-MM-DD-dd HH:MM:SS (24 hr) SON-8 Backup Switching 1.1 V 5.5 V - 40 C + 85 C RV-3028-C8 SMD/SMT Reel, Cut Tape, MouseReel
STMicroelectronics Real Time Clock Serial Access Real Time Clock
2,000Expected 6/14/2027
Cut Tape
$10.08
$7.86
$7.30
$6.69
$6.45
Reel
$6.08
Min.: 1
Mult.: 1
: 1,000
I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SOX-18 Backup Switching 2.7 V 5.5 V - 40 C + 85 C M41T81S 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.
11,935Expected 1/4/2027
Cut Tape
$1.88
$1.38
$1.25
$1.12
Reel
$0.918
Min.: 1
Mult.: 1
: 6,000
PCF85053A SMD/SMT Reel, Cut Tape, MouseReel
Nisshinbo Real Time Clock 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION 2,000In Stock
Cut Tape
$1.64
$1.20
$1.09
$1.03
Reel
$0.79
Min.: 1
Mult.: 1
: 2,000
SSOP-10 RV5C338A Reel, Cut Tape
Renesas / Intersil Real Time Clock LW PWR RTC W/RESEAL 8LD
2,499Expected 12/1/2026
Cut Tape
$3.23
$2.41
$2.20
$1.98
Reel
$1.67
Min.: 1
Mult.: 1
: 2,500
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS:hh (12 hr, 24 hr) SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12008 SMD/SMT Reel, Cut Tape, MouseReel
Renesas / Intersil Real Time Clock REAL TIME CLK/CLNDR W/TEMP COMP 8 L
2,467Expected 1/12/2027
Cut Tape
$5.22
$3.97
$3.66
$3.32
$3.29
Reel
$3.29
Min.: 1
Mult.: 1
: 2,500
Serial 2-Wire, I2C YY-MM-DD-dd HH:MM:SS (24 hr) SOIC-8 Backup Switching 2.7 V 5.5 V - 40 C + 85 C ISL12022 SMD/SMT Reel, Cut Tape, MouseReel