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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.

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Part #

Real Time Clock I2C GP RTCC 64B SRAM, EXT

MCP7940NT-E/MS
Microchip Technology
1: $0.97
3,161In Stock

Mfr. Part No.
MCP7940NT-E/MS

Mouser Part No
579-MCP7940NT-E/MS

Microchip Technology

Real Time Clock I2C GP RTCC 64B SRAM, EXT

Learn More

Datasheet

3,161In Stock

Cut Tape

$0.97

Reel

$0.97

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, 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

+ 125 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock I2C GP RTCC 64B SRAM EXT

MCP7940NT-E/SN
Microchip Technology
1: $0.92
3,156In Stock

Mfr. Part No.
MCP7940NT-E/SN

Mouser Part No
579-MCP7940NT-E/SN

Microchip Technology

Real Time Clock I2C GP RTCC 64B SRAM EXT

Learn More

Datasheet

3,156In Stock

Cut Tape

$0.92

Reel

$0.92

MouseReel Available

Min.: 1
Mult.: 1

: 3,300

Serial 2-Wire, I2C

YY-MM-DD-dd

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

64 B

SOIC-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 125 C

MCP7940N

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock I2C GP RTCC 64B SRAM

MCP7940NT-I/MS
Microchip Technology
1: $0.90
6,014In Stock

Mfr. Part No.
MCP7940NT-I/MS

Mouser Part No
579-MCP7940NT-I/MS

Microchip Technology

Real Time Clock I2C GP RTCC 64B SRAM

Learn More

Datasheet

6,014In Stock

Cut Tape

$0.90

Reel

$0.90

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, 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

Reel, Cut Tape, MouseReel

Real Time Clock I2C GP RTCC 64B SRAM

MCP7940NT-I/ST
Microchip Technology
1: $0.90
2,662In Stock

Mfr. Part No.
MCP7940NT-I/ST

Mouser Part No
579-MCP7940NT-I/ST

Microchip Technology

Real Time Clock I2C GP RTCC 64B SRAM

Learn More

Datasheet

2,662In Stock

Cut Tape

$0.90

Reel

$0.90

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

Serial 2-Wire, I2C

YY-MM-DD-dd

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

64 B

TSSOP-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

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

MCP79410-I/MS
Microchip Technology
1: $1.08
2,260In Stock

Mfr. Part No.
MCP79410-I/MS

Mouser Part No
579-MCP79410-I/MS

Microchip Technology

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

Learn More

Datasheet

2,260In Stock

$1.08

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 I2C GP RTCC 1Kb EE 64B SRAM ID

MCP79410-I/SN
Microchip Technology
1: $1.04
5,272In Stock

Mfr. Part No.
MCP79410-I/SN

Mouser Part No
579-MCP79410-I/SN

Microchip Technology

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

Learn More

Datasheet

5,272In Stock

$1.04

Min.: 1
Mult.: 1

I2C

YY-MM-DD-dd

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

64 B

SOIC-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Tube

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

MCP79410T-I/MS
Microchip Technology
1: $1.08
3,015In Stock

Mfr. Part No.
MCP79410T-I/MS

Mouser Part No
579-MCP79410T-I/MS

Microchip Technology

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

Learn More

Datasheet

3,015In Stock

Cut Tape

$1.08

Reel

$1.08

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

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

Reel, Cut Tape, MouseReel

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

MCP79410T-I/SN
Microchip Technology
1: $1.04
7,685In Stock

Mfr. Part No.
MCP79410T-I/SN

Mouser Part No
579-MCP79410T-I/SN

Microchip Technology

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

Learn More

Datasheet

7,685In Stock

Cut Tape

$1.04

Reel

$1.04

MouseReel Available

Min.: 1
Mult.: 1

: 3,300

I2C

YY-MM-DD-dd

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

64 B

SOIC-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

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

MCP79410T-I/ST
Microchip Technology
1: $1.08
2,951In Stock

Mfr. Part No.
MCP79410T-I/ST

Mouser Part No
579-MCP79410T-I/ST

Microchip Technology

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

Learn More

Datasheet

2,951In Stock

Cut Tape

$1.08

Reel

$1.08

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

I2C

YY-MM-DD-dd

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

64 B

TSSOP-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

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

MCP79412-I/SN
Microchip Technology
1: $1.13
4,117In Stock

Mfr. Part No.
MCP79412-I/SN

Mouser Part No
579-MCP79412ISN

Microchip Technology

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

Learn More

Datasheet

4,117In Stock

$1.13

Min.: 1
Mult.: 1

I2C

YY-MM-DD-dd

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

64 B

SOIC-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Tube

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

MCP79412T-I/MNY
Microchip Technology
1: $1.23
2,105In Stock

Mfr. Part No.
MCP79412T-I/MNY

Mouser Part No
579-MCP79412TIMNY

Microchip Technology

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

Learn More

Datasheet

2,105In Stock

Cut Tape

$1.23

Reel

$1.23

MouseReel Available

Min.: 1
Mult.: 1

: 3,300

I2C

YY-MM-DD-dd

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

64 B

TDFN-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

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

MCP79412T-I/SN
Microchip Technology
1: $1.13
5,829In Stock

Mfr. Part No.
MCP79412T-I/SN

Mouser Part No
579-MCP79412TISN

Microchip Technology

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

Learn More

Datasheet

5,829In Stock

Cut Tape

$1.13

Reel

$1.13

MouseReel Available

Min.: 1
Mult.: 1

: 3,300

I2C

YY-MM-DD-dd

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

64 B

SOIC-8

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM ID

MCP79510T-I/MS
Microchip Technology
1: $1.29
5,338In Stock

Mfr. Part No.
MCP79510T-I/MS

Mouser Part No
579-MCP79510T-I/MS

Microchip Technology

Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM ID

Learn More

Datasheet

5,338In Stock

Cut Tape

$1.29

Reel

$1.29

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 SPI GP RTCC 1Kb EE 64B SRAM EUI-48

MCP79511T-I/MS
Microchip Technology
1: $1.40
1,786In Stock

Mfr. Part No.
MCP79511T-I/MS

Mouser Part No
579-MCP79511T-I/MS

Microchip Technology

Real Time Clock SPI GP RTCC 1Kb EE 64B SRAM EUI-48

Learn More

Datasheet

1,786In Stock

Cut Tape

$1.40

Reel

$1.40

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

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

MCP79522-I/MS
Microchip Technology
1: $1.48
2,595In Stock

Mfr. Part No.
MCP79522-I/MS

Mouser Part No
579-MCP79522-I/MS

Microchip Technology

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

Learn More

Datasheet

2,595In Stock

$1.48

Min.: 1
Mult.: 1

SPI

YY-MM-DD-dd

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

64 B

MSOP-10

Backup Switching

1.8 V

3.6 V

- 40 C

+ 85 C

SMD/SMT

Tube

Real Time Clock 1Kb EE 64B SRAM WD TED ID

MCP795W10-I/ST
Microchip Technology
1: $1.81
1,715In Stock

Mfr. Part No.
MCP795W10-I/ST

Mouser Part No
579-MCP795W10-I/ST

Microchip Technology

Real Time Clock 1Kb EE 64B SRAM WD TED ID

Learn More

Datasheet

1,715In Stock

$1.81

Min.: 1
Mult.: 1

SPI

YY-MM-DD-dd

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

1 kB

TSSOP-14

Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Tube

Real Time Clock 32.768 KHZ IC RTC CLK

AB-RTCMC-32.768kHz-EOA9-S3-DBT
ABRACON
1: $8.55
888In Stock
3,000Expected 2026/11/04

Mfr. Part No.
AB-RTCMC-32.768kHz-EOA9-S3-DBT

Mouser Part No
815-ABMC-327EOA9S3DB

ABRACON

Real Time Clock 32.768 KHZ IC RTC CLK

Learn More

Datasheet

888In Stock

3,000Expected 2026/11/04

Cut Tape

$8.55

$6.62

$6.14

$5.62

View

Reel

$4.62

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

SPI

YY-MM-DD-dd

HH:MM:SS (24 hr)

Backup Switching

1.4 V

5.5 V

- 40 C

+ 125 C

AB-RTCMC

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 4-Wire Real Time Clock IC

R2043T-E2-F
Nisshinbo
1: $1.51
2,316In Stock

Mfr. Part No.
R2043T-E2-F

Mouser Part No
848-R2043TE2F

Nisshinbo

Real Time Clock 4-Wire Real Time Clock IC

Datasheet

2,316In Stock

Cut Tape

$1.51

$1.10

$0.987

$0.876

View

Reel

$0.714

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Serial 4-Wire, SPI

YY-MM-DD-dd

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

TSSOP-10

No Backup Switching

1.7 V

5.5 V

- 40 C

+ 85 C

R2043T

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 2-Wire Real Time Clock IC

R2223L-E2
Nisshinbo
1: $1.64
5,351In Stock

Mfr. Part No.
R2223L-E2

Mouser Part No
848-R2223L-E2

Nisshinbo

Real Time Clock 2-Wire Real Time Clock IC

5,351In Stock

Cut Tape

$1.64

$1.20

$1.09

$0.961

Reel

$0.757

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Serial 2-Wire, I2C

BCD

QFN1818-12

No Backup Switching

1.5 V

5.5 V

- 40 C

+ 85 C

R2223L

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 2-Wire Real Time Clock IC

RV5C387A-E2-F
Nisshinbo
1: $1.64
8,946In Stock

Mfr. Part No.
RV5C387A-E2-F

Mouser Part No
848-RV5C387A-E2-F

Nisshinbo

Real Time Clock 2-Wire Real Time Clock IC

Datasheet

8,946In Stock

Cut Tape

$1.64

$1.20

$1.09

$0.961

View

Reel

$0.88

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-10

No Backup Switching

2 V

5.5 V

- 40 C

+ 85 C

RV5C387

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 32.768kHz, 20PPM, Real-Time Clock Module with SPI-Bus

RV-8063-C8 32.768kHz-20PPM-TA-QC
Micro Crystal
1: $1.90
675In Stock

Mfr. Part No.
RV-8063-C8 32.768kHz-20PPM-TA-QC

Mouser Part No
428-204233-MC01

Micro Crystal

Real Time Clock 32.768kHz, 20PPM, Real-Time Clock Module with SPI-Bus

Learn More

Datasheet

675In Stock

Cut Tape

$1.90

$1.40

$1.24

$1.10

Reel

$0.998

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

SPI

YY-MM-DD-dd

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

SON-8

900 mV

5.5 V

- 40 C

+ 85 C

RV-8063-C8

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 32.768kHz SPI 20ppm 2.0x1.2x0.7 AEC-Q200

RV-8063-C8 32.768kHz-20PPM-TA-QA
Micro Crystal
1: $1.99
960In Stock

Mfr. Part No.
RV-8063-C8 32.768kHz-20PPM-TA-QA

Mouser Part No
428-204290-MC01

Micro Crystal

Real Time Clock 32.768kHz SPI 20ppm 2.0x1.2x0.7 AEC-Q200

Learn More

Datasheet

960In Stock

Cut Tape

$1.99

$1.45

$1.31

$1.16

Reel

$1.05

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Serial 3-Wire, SPI

YY-MM-DD-dd

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

SON-8

900 mV

5.5 V

- 40 C

+ 85 C

RV-8063-C8

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Real-Time Clock SPI interface with power management, -40 to +85 C, 16-pin QFN

AM1815AQ
Ambiq
1: $0.794
1,950In Stock

Mfr. Part No.
AM1815AQ

Mouser Part No
222-AM1815AQ

Ambiq

Real Time Clock Real-Time Clock SPI interface with power management, -40 to +85 C, 16-pin QFN

Datasheet

1,950In Stock

$0.794

Min.: 1
Mult.: 1

Artasie SPI w/ Power Management

Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C

RV-4162-C7-32.768kHz-20PPM-TA-QC
Micro Crystal
1: $3.47
7In Stock

Mfr. Part No.
RV-4162-C7-32.768kHz-20PPM-TA-QC

Mouser Part No
428-200007-MG01

Micro Crystal

Real Time Clock 32.768 kHz +/-20 PPM I2C -40/+85C

Learn More

Datasheet

7In Stock

Cut Tape

$3.47

$2.57

$2.36

$2.11

Reel

$1.86

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Serial 2-Wire, I2C

YY-MM-DD-dd

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

No Backup Switching

1 V

4.4 V

- 40 C

+ 85 C

RV-4162-C7

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock 32.768 kHz +/-3 PPM I2C -40/+85C

RV-8803-C7-32.768k-3PPM-TA-QA
Micro Crystal
1: $3.86
5,714In Stock

Mfr. Part No.
RV-8803-C7-32.768k-3PPM-TA-QA

Mouser Part No
428-203035-MG01

Micro Crystal

Real Time Clock 32.768 kHz +/-3 PPM I2C -40/+85C

Datasheet

5,714In Stock

Cut Tape

$3.86

$2.87

$2.64

$2.36

Reel

$2.06

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

Serial 2-Wire, I2C

YY-MM-DD-dd

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

No Backup Switching

1.5 V

5.5 V

- 40 C

+ 85 C

RV-8803-C7

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock

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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