.hide-partial { max-height: none; } .show-more { display: none; }

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.
More...

Please view our large selection of real time clocks below.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 938

Applied Filters:

Manufacturer

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

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Real Time Clock 2-Wire Real Time Clock IC

R2051L01-E2
Nisshinbo
1: $2.19
79In Stock

Mfr. Part No.
R2051L01-E2

Mouser Part No
848-R2051L01-E2

Nisshinbo

Real Time Clock 2-Wire Real Time Clock IC

Datasheet

79In Stock

Cut Tape

$2.19

$1.60

$1.46

$1.28

Reel

$1.04

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock RTC IC with 114x8 NV SRAM

BQ3285S-SB2
Texas Instruments
1: $22.90
20In Stock
End of Life

Mfr. Part No.
BQ3285S-SB2

Mouser Part No
595-BQ3285S-SB2

End of Life

Texas Instruments

Real Time Clock RTC IC with 114x8 NV SRAM

Datasheet

20In Stock

$22.90

$18.18

$17.00

$16.18

View

Min.: 1
Mult.: 1

Multiplexed

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

114 B

SOIC-24

Backup Switching

4.5 V

5.5 V

0 C

+ 70 C

BQ3285

SMD/SMT

Tube

Real Time Clock Parallel RTC A 595-B Q4802YDWR A 595-BQ4 A 595-BQ4802YDWR

BQ4802YDW
Texas Instruments
1: $34.76
7In Stock
End of Life

Mfr. Part No.
BQ4802YDW

Mouser Part No
595-BQ4802YDW

End of Life

Texas Instruments

Real Time Clock Parallel RTC A 595-B Q4802YDWR A 595-BQ4 A 595-BQ4802YDWR

Datasheet

7In Stock

$34.76

$27.78

$24.64

$24.36

View

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

Real Time Clock Real Time Clock MSOP-8 T&R 2.5K

PT7C433833AUEX
Diodes Incorporated
1: $2.01
2,103In Stock
Factory Special Order

Mfr. Part No.
PT7C433833AUEX

Mouser Part No
729-PT7C433833AUEX

Factory Special Order

Diodes Incorporated

Real Time Clock Real Time Clock MSOP-8 T&R 2.5K

Learn More

Datasheet

2,103In Stock

Cut Tape

$2.01

$1.47

$1.34

$1.19

Reel

View

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, I2C

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

56 B

Backup Switching

2.7 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape

Real Time Clock RX4901CE XS D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-3ppm 2k TR

RX4901CE XS D06
Epson Timing
1: $8.06
1,922In Stock

Mfr. Part No.
RX4901CE XS D06

Mouser Part No
732-RX4901CEXSD06

Epson Timing

Real Time Clock RX4901CE XS D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-3ppm 2k TR

Learn More

Datasheet

1,922In Stock

Cut Tape

$8.06

$6.16

$5.68

$5.17

View

Reel

$4.42

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock Low Power High Stability 5 ppm -40 - +85C IC Real Time Clock 3.2 x 2.5 mm

ECS-RTC-3225-5699HS-TR
ECS
1: $7.71
783In Stock

Mfr. Part No.
ECS-RTC-3225-5699HS-TR

Mouser Part No
520-RTC-32255699HSTR

ECS

Real Time Clock Low Power High Stability 5 ppm -40 - +85C IC Real Time Clock 3.2 x 2.5 mm

Learn More

Datasheet

783In Stock

Cut Tape

$7.71

$5.89

$5.43

$4.92

Reel

$4.49

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 3-Wire 1.3-5.5V

S-35190A-T8T1G
ABLIC
1: $2.49
68In Stock

Mfr. Part No.
S-35190A-T8T1G

Mouser Part No
628-35190A-T8-G

ABLIC

Real Time Clock 3-Wire 1.3-5.5V

Datasheet

68In Stock

Cut Tape

$2.49

$1.82

$1.66

$1.47

Reel

$1.25

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 1024k NV SRAM with Phantom Clock

DS1248WP-120+
Analog Devices / Maxim Integrated
1: $84.88
3In Stock

Mfr. Part No.
DS1248WP-120+

Mouser Part No
700-DS1248WP-120

Analog Devices / Maxim Integrated

Real Time Clock 1024k NV SRAM with Phantom Clock

Datasheet

3In Stock

$84.88

$70.12

$64.94

$64.93

Min.: 1
Mult.: 1

Parallel

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

128 kB

PowerCap Module-34

Backup Switching

2.97 V

3.63 V

0 C

+ 70 C

DS1248WP

SMD/SMT

Tray

Real Time Clock Low-Current I C RTCs for High-ESR Crystals

DS1341T+T&R
Analog Devices / Maxim Integrated
1: $6.01
156In Stock

Mfr. Part No.
DS1341T+T&R

Mouser Part No
700-DS1341T+T&R

Analog Devices / Maxim Integrated

Real Time Clock Low-Current I C RTCs for High-ESR Crystals

Learn More

Datasheet

156In Stock

Cut Tape

$6.01

$4.54

$4.16

$3.77

View

Reel

$3.24

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, I2C

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

TDFN-EP-8

No Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

DS1341T

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Low-Current SPI/3-Wire RTCs

DS1344E-3+
Analog Devices / Maxim Integrated
1: $12.01
53In Stock

Mfr. Part No.
DS1344E-3+

Mouser Part No
700-DS1344E-3+

Analog Devices / Maxim Integrated

Real Time Clock Low-Current SPI/3-Wire RTCs

Learn More

Datasheet

53In Stock

$12.01

$9.30

$8.64

$7.48

View

Min.: 1
Mult.: 1

Serial 3-Wire, SPI

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

96 B

TSSOP-20

Backup Switching

2.7 V

5.5 V

- 40 C

+ 85 C

DS1344E

SMD/SMT

Tube

Real Time Clock I2C-BUS INTERFACE RTC 5+/-23PPM (VSOJ-20) 1K TR

Q41856471000100
Epson Timing
1: $6.65
1,893In Stock

Mfr. Part No.
Q41856471000100

Mouser Part No
732-Q41856471000100

Epson Timing

Real Time Clock I2C-BUS INTERFACE RTC 5+/-23PPM (VSOJ-20) 1K TR

Datasheet

1,893In Stock

Cut Tape

$6.65

$5.02

$4.61

$4.16

$4.11

Reel

$3.48

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

No Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock RX-4045SA:AA0 PURE SN 5+/-5PPM 1K T/R

RX-4045SAAA0 PURE SN
Epson Timing
1: $6.39
1,516In Stock

Mfr. Part No.
RX-4045SAAA0 PURE SN

Mouser Part No
732-R4045SAAA0PURESN

Epson Timing

Real Time Clock RX-4045SA:AA0 PURE SN 5+/-5PPM 1K T/R

Learn More

Datasheet

1,516In Stock

Cut Tape

$6.39

$4.84

$4.45

$4.03

Reel

$3.70

View

Min.: 1
Mult.: 1

: 1,000

Serial 4-Wire

YY-MM-DD-dd

HH:MM:SS (24 hr)

No Backup Switching

1.7 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape

Real Time Clock RX-4045SA:AA3 PURE SN 5+/-5PPM 250 T/R

RX-4045SAAA3 PURE SN
Epson Timing
1: $13.02
945In Stock

Mfr. Part No.
RX-4045SAAA3 PURE SN

Mouser Part No
732-RX-4045SA:AA3S

Epson Timing

Real Time Clock RX-4045SA:AA3 PURE SN 5+/-5PPM 250 T/R

Datasheet

945In Stock

Cut Tape

$13.02

$10.13

$8.62

$8.04

Reel

$7.67

View

MouseReel Available

Min.: 1
Mult.: 1

: 250

Serial 4-Wire

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-4045SA

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock REAL TIME CLOCK 3.0V 5+/-23PPM 1K TR

RX6110SA:B0 PURE SN
Epson Timing
1: $2.22
1,562In Stock

Mfr. Part No.
RX6110SA:B0 PURE SN

Mouser Part No
732-RX6110SAB0PURESN

Epson Timing

Real Time Clock REAL TIME CLOCK 3.0V 5+/-23PPM 1K TR

Datasheet

1,562In Stock

Cut Tape

$2.22

$1.81

$1.71

$1.62

Reel

$1.59

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 32.768kHz 5ppm I2C-Bus

RX8130CE B0
Epson Timing
1: $1.89
7,006In Stock
16,000Expected 3/11/2026

Mfr. Part No.
RX8130CE B0

Mouser Part No
732-RX8130CEB0

Epson Timing

Real Time Clock 32.768kHz 5ppm I2C-Bus

Datasheet

7,006In Stock

16,000Expected 3/11/2026

Cut Tape

$1.89

$1.36

$1.23

$1.09

Reel

$0.933

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 32.768kHz-DTCXO 3.4ppm I2C-Bus

RX8900CE UA0
Epson Timing
1: $5.40
610In Stock
1,000Expected 23/10/2026

Mfr. Part No.
RX8900CE UA0

Mouser Part No
732-RX8900CEUA0

Epson Timing

Real Time Clock 32.768kHz-DTCXO 3.4ppm I2C-Bus

Learn More

Datasheet

610In Stock

1,000Expected 23/10/2026

Cut Tape

$5.40

$4.08

$3.75

$3.39

View

Reel

$3.06

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 32.768kHz-DTCXO 3.4ppm I2C-Bus

RX8900CE UA3
Epson Timing
1: $13.30
914In Stock

Mfr. Part No.
RX8900CE UA3

Mouser Part No
732-RX8900CEUA3

Epson Timing

Real Time Clock 32.768kHz-DTCXO 3.4ppm I2C-Bus

Learn More

Datasheet

Product Comments

914In Stock

Cut Tape

$13.30

$10.36

$9.62

$8.79

Reel

$8.35

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 32.768kHz-DTCXO 5ppm I2C-Bus

RX8900SA UC3 PURE SN
Epson Timing
1: $8.32
766In Stock

Mfr. Part No.
RX8900SA UC3 PURE SN

Mouser Part No
732-RX8900SAUC3SN

Epson Timing

Real Time Clock 32.768kHz-DTCXO 5ppm I2C-Bus

Learn More

Datasheet

766In Stock

Cut Tape

$8.32

$6.38

$5.90

$5.37

Reel

$5.10

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock Clock VCXO

PT7C433833AZEEX
Diodes Incorporated
1: $2.00
1,477In Stock
Factory Special Order

Mfr. Part No.
PT7C433833AZEEX

Mouser Part No
729-PT7C433833AZEEX

Factory Special Order

Diodes Incorporated

Real Time Clock Clock VCXO

Learn More

Datasheet

1,477In Stock

Cut Tape

$2.00

$1.44

$1.30

$1.15

Reel

View

Min.: 1
Mult.: 1

: 3,000

I2C

YY-MM-DD-dd

HH:MM:SS:hh (12 hr, 24 hr)

56 B

TDFN-8

Backup Switching

2.7 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape

Real Time Clock Real Time Clock

PT7C4363BWEX
Diodes Incorporated
1: $1.67
1,769In Stock
Factory Special Order

Mfr. Part No.
PT7C4363BWEX

Mouser Part No
729-PT7C4363BWEX

Factory Special Order

Diodes Incorporated

Real Time Clock Real Time Clock

Learn More

Datasheet

1,769In Stock

Cut Tape

$1.67

$1.20

$1.09

$0.962

Reel

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

SOIC-8

No Backup Switching

1.3 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock RX4901CE XB D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-5ppm 2k TR

RX4901CE XB D06
Epson Timing
1: $6.13
238In Stock

Mfr. Part No.
RX4901CE XB D06

Mouser Part No
732-RX4901CEXBD06

Epson Timing

Real Time Clock RX4901CE XB D0 REAL TIME CLOCK MODULE SPI-Bus 3.0V +/-5ppm 2k TR

Learn More

Datasheet

238In Stock

Cut Tape

$6.13

$4.64

$4.26

$3.85

Reel

$3.21

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock RX-8803LC:UB PURE SN I2C-BUS RTC +/-5.0PPM-40 85C VSOJ-12 PIN BULK

RX-8803LCUB PURE SN BULK
Epson Timing
1: $15.87
5In Stock

Mfr. Part No.
RX-8803LCUB PURE SN BULK

Mouser Part No
732-8803LCUBPRSNBULK

Epson Timing

Real Time Clock RX-8803LC:UB PURE SN I2C-BUS RTC +/-5.0PPM-40 85C VSOJ-12 PIN BULK

Learn More

Datasheet

5In Stock

$15.87

$11.41

$11.02

$10.58

View

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

Real Time Clock I2C Bus 5 +/-23ppm

RX-8025SA:AA0
Epson Timing
1: $5.66
64In Stock
1,000Expected 5/10/2026

Mfr. Part No.
RX-8025SA:AA0

Mouser Part No
732-RX-8025SA:AA0

Epson Timing

Real Time Clock I2C Bus 5 +/-23ppm

Learn More

Datasheet

64In Stock

1,000Expected 5/10/2026

Cut Tape

$5.66

$4.28

$3.93

$3.56

View

Reel

$3.18

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 32.768KHz 3.0Volts 5+/-5ppm -40C +85C

RX-8025SA:AA3
Epson Timing
1: $11.70
114In Stock
500Expected 10/11/2026

Mfr. Part No.
RX-8025SA:AA3

Mouser Part No
732-RX-8025SA:AA3

Epson Timing

Real Time Clock 32.768KHz 3.0Volts 5+/-5ppm -40C +85C

Learn More

Datasheet

114In Stock

500Expected 10/11/2026

Cut Tape

$11.70

$9.07

$8.42

$7.04

Reel

$6.72

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock REAL TIME CLOCK 0+/-5PPM (SOP 14 PIN) 1K TR

RX-8025SA:AC0
Epson Timing
1: $5.63
394In Stock

Mfr. Part No.
RX-8025SA:AC0

Mouser Part No
732-RX-8025SA:AC0

Epson Timing

Real Time Clock REAL TIME CLOCK 0+/-5PPM (SOP 14 PIN) 1K TR

Learn More

Datasheet

394In Stock

Cut Tape

$5.63

$4.24

$3.90

$3.20

Reel

$3.11

View

Min.: 1
Mult.: 1

: 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

Real Time Clock

Customer Service Office

Company

Resources

Support

2 B
3 B
4 B
7 B
8 B
10 B
12 B
16 B
20 B
31 B
32 B
56 B
64 B
96 B
113 B
114 B
128 B
160 B
236 B
242 B

3.2 mm x 2.5 mm x 1 mm
DFN-16
DFN-20
DFN2626-10
DFN-8
DIP-16
DIP-8
EDIP-24
EDIP-28
EDIP-32
HWSON-8
LGA-10
MSOP-10
MSOP-8
PCDIP-24
PCDIP-28
PDIP-16
PDIP-24
PDIP-28
PDIP-8

600 mV
750 mV
900 mV
1 V
1.1 V
1.2 V
1.25 V
1.3 V
1.4 V
1.5 V
1.6 V
1.7 V
1.71 V
1.8 V
2 V
2.2 V
2.3 V
2.38 V
2.4 V
2.5 V

1338
1339
1337AGD
AB-RTC-TA-32.768kHz-2
AB-RTC-TC-32.768kHz-2
AB-RTC-TH-32.768kHz-2
AB-RTC-XB-32.768kHz-2
AB-RTC-XL
AB-RTC-XLA
AB-RTC-XP-32.768kHz-2
AB-RTC-XPA-32.768kHz-2
AB-RTCMC
AB08x5
AB18x5
Artasie I2C
Artasie I2C w/ Power Management
Artasie SPI
Artasie SPI w/ Power Management
BQ32000
BQ32002