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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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Part #

Real Time Clock RTCs 3725 10-SMD I2C HH:MM:SS (12/24 hr) YY-MM-DD-dd

AB-RTCMC-32.768KHZ-EOZ9-S3-HAT
ABRACON
1: $9.55
326In Stock

Mfr. Part No.
AB-RTCMC-32.768KHZ-EOZ9-S3-HAT

Mouser Part No
815-2768KHZEOZ9S3HAT

ABRACON

Real Time Clock RTCs 3725 10-SMD I2C HH:MM:SS (12/24 hr) YY-MM-DD-dd

Datasheet

326In Stock

Cut Tape

$9.55

$7.43

$6.90

$6.32

Reel

$5.53

View

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

Real Time Clock Serial I2C bus RTC

M41T83ZMY6F
STMicroelectronics
1: $6.96
795In Stock

Mfr. Part No.
M41T83ZMY6F

Mouser Part No
511-M41T83ZMY6F

STMicroelectronics

Real Time Clock Serial I2C bus RTC

Datasheet

795In Stock

Cut Tape

$6.96

$5.36

$4.96

$4.25

View

Reel

$3.93

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Serial

YY-MM-DD-dd

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

32 B

Backup Switching

2.38 V

5.5 V

- 40 C

+ 85 C

M41T83

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48

MCP79521T-I/MS
Microchip Technology
1: $1.48
1,295In Stock

Mfr. Part No.
MCP79521T-I/MS

Mouser Part No
579-MCP79521T-I/MS

Microchip Technology

Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48

Learn More

Datasheet

1,295In Stock

Cut Tape

$1.48

$1.46

$1.45

$1.36

Reel

$1.36

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial, I2C, SPI

YY-MM-DD-dd

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

64 B

Backup Switching

1.8 V

3.6 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock REAL TIME CLK W/ ALARM & TIMR FUNCTNS

ISL12058IBZ
Renesas / Intersil
1: $2.73
2,092In Stock

Mfr. Part No.
ISL12058IBZ

Mouser Part No
968-ISL12058IBZ

Renesas / Intersil

Real Time Clock REAL TIME CLK W/ ALARM & TIMR FUNCTNS

Datasheet

2,092In Stock

$2.73

$2.04

$1.86

$1.67

View

Min.: 1
Mult.: 1

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

SOIC-8

No Backup Switching

1.8 V

3.6 V

- 40 C

+ 85 C

ISL12058

SMD/SMT

Tube

Real Time Clock Serial 512 (64x8)

M41T11MH6F
STMicroelectronics
1: $9.28
1,358In Stock

Mfr. Part No.
M41T11MH6F

Mouser Part No
511-M41T11MH6F

STMicroelectronics

Real Time Clock Serial 512 (64x8)

Datasheet

1,358In Stock

Cut Tape

$9.28

$7.20

$6.68

$6.10

View

Reel

$5.28

MouseReel Available

Min.: 1
Mult.: 1

: 936

Serial

YY-MM-DD-dd

HH:MM:SS (24 hr)

64 B

SOX-28

Backup Switching

2 V

5.5 V

- 40 C

+ 85 C

M41T11

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 64K (8Kx8) 70ns

M48T58-70PC1
STMicroelectronics
1: $41.40
247In Stock

Mfr. Part No.
M48T58-70PC1

Mouser Part No
511-M48T5870PC1

STMicroelectronics

Real Time Clock 64K (8Kx8) 70ns

Datasheet

247In Stock

$41.40

$33.58

$31.45

$29.02

View

Min.: 1
Mult.: 1

Parallel

YY-MM-DD-dd

HH:MM:SS (24 hr)

8 kB

PCDIP-28

Integrated Battery

4.75 V

5.5 V

0 C

+ 70 C

M48T58

Through Hole

Tube

Real Time Clock Real-Time Event Recorder

DS1678+
Analog Devices / Maxim Integrated
1: $13.16
48In Stock

Mfr. Part No.
DS1678+

Mouser Part No
700-DS1678

Analog Devices / Maxim Integrated

Real Time Clock Real-Time Event Recorder

Datasheet

48In Stock

$13.16

$10.30

$8.75

$8.22

View

Min.: 1
Mult.: 1

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

32 B

PDIP-8

Backup Switching

4.5 V

5.5 V

- 40 C

+ 85 C

DS1678

Through Hole

Tube

Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64

MCP79412-I/MS
Microchip Technology
1: $1.18
3,970In Stock

Mfr. Part No.
MCP79412-I/MS

Mouser Part No
579-MCP79412IMS

Microchip Technology

Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64

Learn More

Datasheet

3,970In Stock

$1.18

$1.08

$1.03

$1.02

$1.00

Min.: 1
Mult.: 1

I2C

YY-MM-DD-dd

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

64 B

MSOP-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Tube

Real Time Clock Real Time Clock

S-35190A-J8T1U
ABLIC
1: $1.14
4,757In Stock

Mfr. Part No.
S-35190A-J8T1U

Mouser Part No
628-35190A-G

ABLIC

Real Time Clock Real Time Clock

Datasheet

4,757In Stock

Cut Tape

$1.14

$0.919

$0.866

$0.807

View

Reel

$0.698

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

Serial 3-Wire

YY-MM-DD-dd

HH:MM:SS (24 hr)

SOP-8

Backup Switching

1.3 V

5.5 V

- 40 C

+ 85 C

S-35190

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Ultra-Low power 12C Real Time clock w/ p

MAX31331TETB+
Analog Devices / Maxim Integrated
1: $3.37
2,811In Stock

Mfr. Part No.
MAX31331TETB+

Mouser Part No
700-MAX31331TETB+

Analog Devices / Maxim Integrated

Real Time Clock Ultra-Low power 12C Real Time clock w/ p

Learn More

Datasheet

2,811In Stock

$3.37

$2.53

$2.32

$2.09

View

Min.: 1
Mult.: 1

Tray

Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL

ISL12022MIBZ
Renesas / Intersil
1: $7.47
358In Stock

Mfr. Part No.
ISL12022MIBZ

Mouser Part No
968-ISL12022MIBZ

Renesas / Intersil

Real Time Clock REAL TIME CLK & TEMP COMPENSATED CRYSTAL

Datasheet

358In Stock

$7.47

$5.76

$4.75

$4.46

View

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

Real Time Clock .9RTC BASE

1338-31DCGI
Renesas Electronics
1: $3.85
1,725In Stock

Mfr. Part No.
1338-31DCGI

Mouser Part No
972-1338-31DCGI

Renesas Electronics

Real Time Clock .9RTC BASE

Datasheet

1,725In Stock

$3.85

$2.91

$2.41

$1.95

$1.93

Min.: 1
Mult.: 1

Serial 2-Wire, I2C

YY-MM-DD-dd

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

56 B

SOIC-8

Backup Switching

1.3 V

3.7 V

- 40 C

+ 85 C

1338

SMD/SMT

Tube

Real Time Clock 2-Wire Real Time Clock IC

R2223T-E2-F
Nisshinbo
1: $1.66
1,680In Stock

Mfr. Part No.
R2223T-E2-F

Mouser Part No
848-R2223TE2F

Nisshinbo

Real Time Clock 2-Wire Real Time Clock IC

1,680In Stock

Cut Tape

$1.66

$1.22

$1.10

$0.977

Reel

$0.762

View

MouseReel Available

Min.: 1
Mult.: 1

: 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

Real Time Clock 2-Wire Real Time Clock IC

RS5C372B-E2-F
Nisshinbo
1: $1.64
1,459In Stock

Mfr. Part No.
RS5C372B-E2-F

Mouser Part No
848-RS5C372B-E2-F

Nisshinbo

Real Time Clock 2-Wire Real Time Clock IC

Datasheet

1,459In Stock

Cut Tape

$1.64

$1.20

$1.09

$0.961

Reel

$0.79

View

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Serial 2-Wire, I2C

YY-MM-DD-dd

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

16 B

SSOP-8

Backup Switching

2 V

6 V

- 40 C

+ 85 C

RS5C372

SMD/SMT

Reel, Cut Tape, MouseReel

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)

RV-8803-C7-TA-QC
Micro Crystal
1: $3.28
559In Stock
1,000Expected 10/07/2026

Mfr. Part No.
RV-8803-C7-TA-QC

Mouser Part No
428-RV-8803-C7-TA-QC

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)

Datasheet

559In Stock

1,000Expected 10/07/2026

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

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

DS1341U+
Analog Devices / Maxim Integrated
1: $5.04
322In Stock

Mfr. Part No.
DS1341U+

Mouser Part No
700-DS1341U

Analog Devices / Maxim Integrated

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

Learn More

Datasheet

322In Stock

$5.04

$3.84

$3.50

$3.20

View

Min.: 1
Mult.: 1

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

DS1341U

SMD/SMT

Tube

Real Time Clock 256k Nonvolatile, Y2K-Compliant Timekeep

DS1554P-70+
Analog Devices / Maxim Integrated
1: $47.53
37In Stock

Mfr. Part No.
DS1554P-70+

Mouser Part No
700-DS1554P-70

Analog Devices / Maxim Integrated

Real Time Clock 256k Nonvolatile, Y2K-Compliant Timekeep

Datasheet

37In Stock

$47.53

$38.84

$36.33

$34.61

View

Min.: 1
Mult.: 1

Parallel

YY-MM-DD-dd

HH:MM:SS (24 hr)

32 kB

PowerCap Module-34

Backup Switching

4.5 V

5.5 V

0 C

+ 70 C

DS1554P

SMD/SMT

Tray

Real Time Clock Watchdog Clocks with NV RAM Control

DS1558W+
Analog Devices / Maxim Integrated
1: $19.80
78In Stock

Mfr. Part No.
DS1558W+

Mouser Part No
700-DS1558W

Analog Devices / Maxim Integrated

Real Time Clock Watchdog Clocks with NV RAM Control

Datasheet

78In Stock

$19.80

$15.69

$14.67

$13.54

View

Min.: 1
Mult.: 1

Parallel

YY-MM-DD-dd

HH:MM:SS (24 hr)

TQFP-48

Backup Switching

2.97 V

3.63 V

- 40 C

+ 85 C

DS1558W

SMD/SMT

Tray

Real Time Clock I C 32-Bit Binary Counter RTC

DS1672S-3+T&R
Analog Devices / Maxim Integrated
1: $5.29
2,080In Stock

Mfr. Part No.
DS1672S-3+T&R

Mouser Part No
700-DS1672S-3T&R

Analog Devices / Maxim Integrated

Real Time Clock I C 32-Bit Binary Counter RTC

Datasheet

2,080In Stock

Cut Tape

$5.29

$4.03

$3.72

$3.37

View

Reel

$3.02

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, I2C

Binary

SOIC-8

Backup Switching

2.7 V

3.3 V

- 40 C

+ 85 C

DS1672S

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 3V/5V Real-Time Clocks

DS17487-5+
Analog Devices / Maxim Integrated
1: $31.76
53In Stock

Mfr. Part No.
DS17487-5+

Mouser Part No
700-DS17487-5

Analog Devices / Maxim Integrated

Real Time Clock 3V/5V Real-Time Clocks

Datasheet

53In Stock

$31.76

$26.53

$25.24

$23.81

$22.67

Min.: 1
Mult.: 1

Multiplexed

YY-MM-DD-dd

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

4 kB

EDIP-24

Integrated Battery

4.5 V

5.5 V

0 C

+ 70 C

DS17487

Through Hole

Tube

Real Time Clock Real-time Clock IC

PT7C4337AWEX
Diodes Incorporated
1: $1.22
88In Stock

Mfr. Part No.
PT7C4337AWEX

Mouser Part No
729-PT7C4337AWEX

Diodes Incorporated

Real Time Clock Real-time Clock IC

Learn More

Datasheet

88In Stock

Cut Tape

$1.22

$0.88

$0.797

$0.704

View

Reel

$0.579

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, I2C

YY-MM-DD-dd

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

No Backup Switching

1.2 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock I C Serial Real-Time Clock

DS1339U-3+T&R
Analog Devices / Maxim Integrated
1: $6.30
2,433In Stock

Mfr. Part No.
DS1339U-3+T&R

Mouser Part No
700-DS1339U-3T&R

Analog Devices / Maxim Integrated

Real Time Clock I C Serial Real-Time Clock

Learn More

Datasheet

2,433In Stock

Cut Tape

$6.30

$4.83

$4.46

$4.06

View

Reel

$3.65

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Serial 2-Wire, I2C

YY-MM-DD-dd

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

uSOP-8

Backup Switching

2.7 V

3.3 V

- 40 C

+ 85 C

DS1339U

SMD/SMT

Reel, Cut Tape, MouseReel

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

DS1344D-33+T&R
Analog Devices / Maxim Integrated
1: $7.10
1,954In Stock

Mfr. Part No.
DS1344D-33+T&R

Mouser Part No
700-DS1344D-33+T&R

Analog Devices / Maxim Integrated

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

Learn More

Datasheet

1,954In Stock

Cut Tape

$7.10

$5.47

$4.96

$4.62

View

Reel

$4.27

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 3-Wire, SPI

YY-MM-DD-dd

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

96 B

TDFN-EP-14

Backup Switching

3 V

5.5 V

- 40 C

+ 85 C

DS1344D

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock I C, 32-Bit, Binary Counter Clock with 64-Bit ID

DS1372U+T&R
Analog Devices / Maxim Integrated
1: $4.91
1,307In Stock

Mfr. Part No.
DS1372U+T&R

Mouser Part No
700-DS1372UT&R

Analog Devices / Maxim Integrated

Real Time Clock I C, 32-Bit, Binary Counter Clock with 64-Bit ID

Datasheet

1,307In Stock

Cut Tape

$4.91

$3.73

$3.42

$3.09

View

Reel

$2.67

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Serial 2-Wire, I2C

Binary

4 B

uSOP-8

No Backup Switching

2.4 V

5.5 V

- 40 C

+ 85 C

DS1372U+

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R

DS1744W-120+
Analog Devices / Maxim Integrated
1: $51.13
16In Stock

Mfr. Part No.
DS1744W-120+

Mouser Part No
700-DS1744W-120

Analog Devices / Maxim Integrated

Real Time Clock Y2K-Compliant, Nonvolatile Timekeeping R

Datasheet

16In Stock

$51.13

$45.16

$41.73

$40.34

View

Min.: 1
Mult.: 1

Parallel

YY-MM-DD-dd

HH:MM:SS (24 hr)

32 kB

EDIP-28

Integrated Battery

2.97 V

3.63 V

0 C

+ 70 C

DS1744W

Through Hole

Tube

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

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
PLCC-28

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