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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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Results: 852

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Part #

Real Time Clock I C Serial Real-Time Clock

DS1339C-33#T&R
Analog Devices / Maxim Integrated
Restricted Availability

Mfr. Part #
DS1339C-33#T&R

Mouser Part #
700-DS1339C-33#T&R-

Analog Devices / Maxim Integrated

Real Time Clock I C Serial Real-Time Clock

Learn More

Datasheet

Restricted Availability

Serial 2-Wire, I2C

YY-MM-DD-dd

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

SO-16

Backup Switching

2.97 V

5.5 V

- 40 C

+ 85 C

DS1339C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Real-Time Event Recorder

DS1678S+
Analog Devices / Maxim Integrated
Restricted Availability

Mfr. Part #
DS1678S+

Mouser Part #
700-DS1678S

Analog Devices / Maxim Integrated

Real Time Clock Real-Time Event Recorder

Datasheet

Restricted Availability

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

32 B

SOIC-8

Backup Switching

4.5 V

5.5 V

- 40 C

+ 85 C

DS1678S

SMD/SMT

Tube

Real Time Clock ULTRA LO PWR CLK/CAL RTC IC

PCF8563T/F4,118
NXP Semiconductors
Restricted Availability

Mfr. Part #
PCF8563T/F4,118

Mouser Part #
771-PCF8563TD-T

NXP Semiconductors

Real Time Clock ULTRA LO PWR CLK/CAL RTC IC

Datasheet

Restricted Availability

I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

SOIC-8

No Backup Switching

1.8 V

5.5 V

- 40 C

+ 85 C

PCF8563

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock

RV-3129-C3-32.768k-OPTION-A-TB-QA
Micro Crystal
1,000: $2.60
Non-Stocked

Mfr. Part #
RV-3129-C3-32.768k-OPTION-A-TB-QA

Mouser Part #
428-203618-MG1

Micro Crystal

Real Time Clock

Datasheet

Non-Stocked

$2.60

Min.: 1,000
Mult.: 1,000

Real Time Clock

RV-3129-C3-32.768k-OPTION-B-TB-QA
Micro Crystal
1,000: $2.17
Non-Stocked

Mfr. Part #
RV-3129-C3-32.768k-OPTION-B-TB-QA

Mouser Part #
428-203639-MG1

Micro Crystal

Real Time Clock

Datasheet

Non-Stocked

$2.17

Min.: 1,000
Mult.: 1,000

Real Time Clock

RV-3149-C3-32.768k-OPTION-A-TB-QA
Micro Crystal
1,000: $2.60
Non-Stocked

Mfr. Part #
RV-3149-C3-32.768k-OPTION-A-TB-QA

Mouser Part #
428-203641-MG1

Micro Crystal

Real Time Clock

Datasheet

Non-Stocked

$2.60

Min.: 1,000
Mult.: 1,000

Real Time Clock

RV-3149-C3-32.768k-OPTION-B-TB-QA
Micro Crystal
1,000: $2.17
Non-Stocked

Mfr. Part #
RV-3149-C3-32.768k-OPTION-B-TB-QA

Mouser Part #
428-203684-MG1

Micro Crystal

Real Time Clock

Datasheet

Non-Stocked

$2.17

Min.: 1,000
Mult.: 1,000

Real Time Clock Real Time Clock SEAM3225 T&R 3K

RT313242N3
Diodes Incorporated
3,000: $1.58
Non-Stocked Lead-Time 32 Weeks
New Product

Mfr. Part #
RT313242N3

Mouser Part #
621-RT313242N3

New Product

Diodes Incorporated

Real Time Clock Real Time Clock SEAM3225 T&R 3K

Datasheet

Non-Stocked Lead-Time 32 Weeks

Reel

$1.58

Min.: 3,000
Mult.: 3,000

: 3,000

I2C

YYYY-MM-DD

HH:MM:SS (24 hr)

SMD-10

1.3 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

Real Time Clock Real Time Clock SEAM3225 T&R 3K

RT313242Q3
Diodes Incorporated
3,000: $1.71
Non-Stocked Lead-Time 32 Weeks
New Product

Mfr. Part #
RT313242Q3

Mouser Part #
621-RT313242Q3

New Product

Diodes Incorporated

Real Time Clock Real Time Clock SEAM3225 T&R 3K

Datasheet

Non-Stocked Lead-Time 32 Weeks

Reel

$1.71

Min.: 3,000
Mult.: 3,000

: 3,000

I2C

YYYY-MM-DD

HH:MM:SS (24 hr)

SMD-10

1.3 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

Real Time Clock Real Time Clock SEAM3225 T&R 3K

RT313243N3
Diodes Incorporated
3,000: $1.37
Non-Stocked Lead-Time 32 Weeks
New Product

Mfr. Part #
RT313243N3

Mouser Part #
621-RT313243N3

New Product

Diodes Incorporated

Real Time Clock Real Time Clock SEAM3225 T&R 3K

Datasheet

Non-Stocked Lead-Time 32 Weeks

Reel

$1.37

Min.: 3,000
Mult.: 3,000

: 3,000

I2C

YYYY-MM-DD

HH:MM:SS (24 hr)

SMD-10

1.3 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

Real Time Clock Real Time Clock SEAM3225 T&R 3K

RT313243Q1
Diodes Incorporated
3,000: $1.97
Non-Stocked Lead-Time 32 Weeks
New Product

Mfr. Part #
RT313243Q1

Mouser Part #
621-RT313243Q1

New Product

Diodes Incorporated

Real Time Clock Real Time Clock SEAM3225 T&R 3K

Datasheet

Non-Stocked Lead-Time 32 Weeks

Reel

$1.97

Min.: 3,000
Mult.: 3,000

: 3,000

I2C

YYYY-MM-DD

HH:MM:SS (24 hr)

SMD-10

1.3 V

5.5 V

- 40 C

+ 125 C

SMD/SMT

Reel

Real Time Clock Real Time Clock SEAM3225 T&R 3K

RT313243Q2
Diodes Incorporated
3,000: $1.84
Non-Stocked Lead-Time 32 Weeks
New Product

Mfr. Part #
RT313243Q2

Mouser Part #
621-RT313243Q2

New Product

Diodes Incorporated

Real Time Clock Real Time Clock SEAM3225 T&R 3K

Datasheet

Non-Stocked Lead-Time 32 Weeks

Reel

$1.84

Min.: 3,000
Mult.: 3,000

: 3,000

I2C

YYYY-MM-DD

HH:MM:SS (24 hr)

SMD-10

1.3 V

5.5 V

- 40 C

+ 105 C

SMD/SMT

Reel

Real Time Clock I2C Bus RTC w/56byte NVRAM RTC

PT7C4311ZEEX
Diodes Incorporated
3,000: $0.698
Non-Stocked Lead-Time 28 Weeks

Mfr. Part #
PT7C4311ZEEX

Mouser Part #
729-PT7C4311ZEEX

Diodes Incorporated

Real Time Clock I2C Bus RTC w/56byte NVRAM RTC

Learn More

Datasheet

Non-Stocked Lead-Time 28 Weeks

Reel

$0.698

Min.: 3,000
Mult.: 3,000

: 3,000

Serial 2-Wire, I2C

YY-MM-DD-dd

HH:MM:SS (24 hr)

56 B

Backup Switching

1.2 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

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

PT7C4337UEX-2017
Diodes Incorporated
2,500: $0.549
Non-Stocked Lead-Time 40 Weeks

Mfr. Part #
PT7C4337UEX-2017

Mouser Part #
729-PT7C4337UEX-2017

Diodes Incorporated

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

Datasheet

Non-Stocked Lead-Time 40 Weeks

Reel

$0.549

Min.: 2,500
Mult.: 2,500

: 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

Real Time Clock 1338B-18 REAL TIME CLOCK

1338B-18DVGI8
Renesas Electronics
2,500: $1.65
Non-Stocked Lead-Time 33 Weeks

Mfr. Part #
1338B-18DVGI8

Mouser Part #
972-1338B-18DVGI8

Renesas Electronics

Real Time Clock 1338B-18 REAL TIME CLOCK

Datasheet

Non-Stocked Lead-Time 33 Weeks

Reel

$1.65

Min.: 2,500
Mult.: 2,500

: 2,500

1338

Reel

Real Time Clock 1338D-31 REAL TIME CLOCK

1338D-31DVGI8
Renesas Electronics
2,500: $1.56
Non-Stocked Lead-Time 33 Weeks

Mfr. Part #
1338D-31DVGI8

Mouser Part #
972-1338D-31DVGI8

Renesas Electronics

Real Time Clock 1338D-31 REAL TIME CLOCK

Datasheet

Non-Stocked Lead-Time 33 Weeks

Reel

$1.56

Min.: 2,500
Mult.: 2,500

: 2,500

1338

Reel

Real Time Clock 1339D-31 REAL TIME CLOCK

1339D-31DVGI8
Renesas Electronics
2,500: $1.54
Non-Stocked Lead-Time 33 Weeks

Mfr. Part #
1339D-31DVGI8

Mouser Part #
972-1339D-31DVGI8

Renesas Electronics

Real Time Clock 1339D-31 REAL TIME CLOCK

Datasheet

Non-Stocked Lead-Time 33 Weeks

Reel

$1.54

Min.: 2,500
Mult.: 2,500

: 2,500

1339

Reel

Real Time Clock Real Time Clock

RX-4571LC:B0 PURE SN
Epson Timing
1: $3.64
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RX-4571LC:B0 PURE SN

Mouser Part #
732-R4571LC:B0PURESN

Epson Timing

Real Time Clock Real Time Clock

Datasheet

Non-Stocked Lead-Time 17 Weeks

Cut Tape

$3.64

$2.71

$2.52

$2.11

Reel

$1.78

$1.76

MouseReel Available

Min.: 1
Mult.: 1

: 1,000

I2C

No Backup Switching

1.6 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel, Cut Tape, MouseReel

Real Time Clock Real Time Clock

RX-4571SA:B0 PURE SN
Epson Timing
1,000: $1.64
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RX-4571SA:B0 PURE SN

Mouser Part #
732-R4571SA:B0PURESN

Epson Timing

Real Time Clock Real Time Clock

Datasheet

Non-Stocked Lead-Time 17 Weeks

Reel

$1.64

$1.62

Min.: 1,000
Mult.: 1,000

: 1,000

Serial 3-Wire

No Backup Switching

1.6 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

Real Time Clock Real Time Clock

RX-8803SA:UB0 PURE SN
Epson Timing
1,000: $2.14
Non-Stocked Lead-Time 20 Weeks

Mfr. Part #
RX-8803SA:UB0 PURE SN

Mouser Part #
732-R8803SAUB0PURESN

Epson Timing

Real Time Clock Real Time Clock

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

$2.14

$2.10

Min.: 1,000
Mult.: 1,000

: 1,000

I2C

No Backup Switching

1.6 V

5.5 V

- 40 C

+ 85 C

SMD/SMT

Reel

Real Time Clock RTC I2C-BUS 5+23PPM SON-22 PIN 250TR

RTC-8564NB:B3 ROHS
Epson Timing
1: $10.56
Non-Stocked Lead-Time 16 Weeks
New At Mouser

Mfr. Part #
RTC-8564NB:B3 ROHS

Mouser Part #
732-RTC8564NBB3ROHS

New At Mouser

Epson Timing

Real Time Clock RTC I2C-BUS 5+23PPM SON-22 PIN 250TR

Datasheet

Non-Stocked Lead-Time 16 Weeks

Cut Tape

$10.56

$8.22

$7.63

$6.99

Reel

$6.69

View

MouseReel Available

Min.: 1
Mult.: 1

: 250

MG7050HAN

Reel, Cut Tape, MouseReel

Real Time Clock RX-4571SA:B0 PURE SN RTC SON 14PIN 5+/-23PPM 1K TR

RX-4571SAB0 PURE SN
Epson Timing
1,000: $1.83
Non-Stocked Lead-Time 16 Weeks

Mfr. Part #
RX-4571SAB0 PURE SN

Mouser Part #
732-RX-4571SABPURESN

Epson Timing

Real Time Clock RX-4571SA:B0 PURE SN RTC SON 14PIN 5+/-23PPM 1K TR

Datasheet

Non-Stocked Lead-Time 16 Weeks

Reel

$1.83

$1.80

$1.78

Min.: 1,000
Mult.: 1,000

: 1,000

I2C

YY-MM-DD-dd

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

SOP-14

No Backup Switching

1.6 V

5.5 V

- 40 C

+ 85 C

RX-4571SA

SMD/SMT

Reel

Real Time Clock RX-4803SA:UA0 PURE SN RTC +/-3.4PPM-40 85C 1K T/R

RX-4803SAUA0 PURE SN
Epson Timing
1,000: $3.41
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RX-4803SAUA0 PURE SN

Mouser Part #
732-RX-483SAUAPURESN

Epson Timing

Real Time Clock RX-4803SA:UA0 PURE SN RTC +/-3.4PPM-40 85C 1K T/R

Datasheet

Non-Stocked Lead-Time 17 Weeks

Reel

$3.41

Min.: 1,000
Mult.: 1,000

: 1,000

SPI

YY-MM-DD-dd

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

SOP-14

No Backup Switching

1.6 V

5.5 V

- 40 C

+ 85 C

RX-4803SA

SMD/SMT

Reel

Real Time Clock 32.768KHz 2.5V-5.5V 8 Bit x 256

RX-5412SF:B3
Epson Timing
250: $5.63
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RX-5412SF:B3

Mouser Part #
732-RX-5412SF:B3

Epson Timing

Real Time Clock 32.768KHz 2.5V-5.5V 8 Bit x 256

Datasheet

Non-Stocked Lead-Time 17 Weeks

Reel

$5.63

$5.62

Quote

Min.: 250
Mult.: 250

: 250

Serial 4-Wire

8 B

2.5 V

5.5 V

- 40 C

+ 85 C

RX-5412SF

SMD/SMT

Reel

Real Time Clock 3.0Volt -40 to 85C I2C BUS

RX-8035LC:AA0
Epson Timing
1,000: $2.56
Non-Stocked Lead-Time 17 Weeks

Mfr. Part #
RX-8035LC:AA0

Mouser Part #
732-RX-8035LC:AA0

Epson Timing

Real Time Clock 3.0Volt -40 to 85C I2C BUS

Datasheet

Non-Stocked Lead-Time 17 Weeks

Reel

$2.56

Min.: 1,000
Mult.: 1,000

: 1,000

I2C

VSOJ-12

2.4 V

5.5 V

- 40 C

+ 85 C

RX-8035LC

SMD/SMT

Reel

Real Time Clock

Customer Service Office

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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-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