Real Time Clocks DistyParts

Integrated Circuits (ICs) > Real Time Clocks

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Real Time Clocks (RTCs) enable accurate timekeeping in electronic systems. Key attributes include Current, Date Format, and Operating Temperature, which are essential for ensuring compatibility and performance in various applications. These components are commonly used in new product design and prototyping, as well as in production electronics assembly.

What are Real Time Clocks ?

Real Time Clocks (RTCs) are integrated circuits designed to keep track of the current time and date, even when the main power is off. They are widely used in applications such as timers, clocks, and scheduling devices in consumer electronics and industrial systems. Important specifications for selecting RTCs include Current, which affects power consumption; Date Format, which determines how the time is displayed; and Operating Temperature, which ensures reliable performance in different environments. Procurement teams should validate lifecycle status and consider alternate-source options to mitigate sourcing risks.

Part & Mfr

Current

Date Format

Features

Function

Interface

Interrupt Output

Lead Spacing

Lead Style

Memory Size

Mounting Style

Mounting Type

Number of Pins

Operating Temperature

Operating Voltage

Product Type

SVHC Present

Storage Temperature

Supplier Device Package

Supplier Package

Supply Voltage

Tape & Reel

Termination Style

Time Format

Type

Voltage

Voltage Supply

PCF8563T/F4,118

NXP Semiconductors

16,850

Across 4 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	6,565	-	-
Fe Components	2,500	-	-
Optech Co.,Limited	5,605	-	-
Xingangxin	2,180	-	-

$5.21

0.6 µA to 0.75 µA

YY-MM-DD-dd

Alarm, Leap Year, Watchdog Timer; Century flag; Programmable clock output; Integrated oscillator capacitor; Internal Power-On Reset (POR); Open-drain interrupt pin

I²C

Surface Mount

-40°C to 85°C

8-SO

HH:MM:SS (24 hr)

Clock/Calendar

1.8 V to 5.5 V

M41T83SMY6F

STMicroelectronics

16,751

Across 4 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	4,000	-	-
Fe Components	12,000	-	-
Optech Co.,Limited	1	-	-
Xingangxin	750	-	-

$5.21

10µA @ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer

I²C, 2-Wire Serial

7.5 mm

Surface Mount

-40°C ~ 85°C

18-SOX

HH:MM:SS:hh (24 hr)

Clock/Calendar

2V ~ 5.5V

M41T82RM6F

STMicroelectronics

16,319

Across 2 distributors

Distributor	Stock	MOQ	Country
Fe Components	15,000	-	-
Xingangxin	1,319	-	-

$3.00

10µA @ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, SRAM, Watchdog Timer

I²C, 2-Wire Serial

0.154 mm

Surface Mount

-40°C ~ 85°C

8-SOIC

HH:MM:SS:hh (24 hr)

Clock/Calendar

2V ~ 5.5V

DS1682S+T&R

Analog Devices / Maxim Integrated

15,268

Across 5 distributors

Distributor	Stock	MOQ	Country
Fe Components	5,854	-	-
MW.FEP S.p.A.	19	-	-
Bristol Electronics	7	-	-
Xingangxin	9,388	-	-
HK XINYUANXIN ELECTRONIC TECH LIMITED	Stock on Request	-	-

Price on request

4µA ~ 15µA @ 3V ~ 5.5V

Binary

Alarm, EEPROM

I²C, 2-Wire Serial

10B

Surface Mount

-40°C to +85°C

8-SOIC

Binary

Elapsed Time Counter

2.5V ~ 5.5V

M41T00SM6F

STMicroelectronics

15,180

Across 5 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	3,566	-	-
Fe Components	7,503	-	-
Tomark Electronics Ltd	1	-	-
Xingangxin	3,539	-	-
Smaxon Electronics	571	-	-

$3.00

70µA @ 2.7V ~ 5.5V

YY-MM-DD-dd

Leap Year

I2C, 2-Wire Serial

3.90 mm

Surface Mount

-40°C

8-SOIC

HH:MM:SS (24 hr)

Clock/Calendar

2V ~ 3.5V

2.7V

M41T94MQ6E

STMicroelectronics

15,067

From Romaks Technologies

Price on request

1.4mA @ 2.7V ~ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer

SPI

1.27 mm

Gull Wing

44B

Surface Mount

-40°C ~ 85°C

Not Present

16-SO

HH:MM:SS:hh (24 hr)

Clock/Calendar

2.5V ~ 3.5V

DS1338U-3

Analog Devices / Maxim Integrated

15,067

From Romaks Technologies

Price on request

200µA @ 3.3V

YY-MM-DD-dd

Leap Year, NVSRAM, Square Wave Output

I²C, 2-Wire Serial

56B

Surface Mount

-40°C ~ 85°C

8-uMAX/uSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V ~ 3.7V

M41T94MH6F

STMicroelectronics

15,040

Across 3 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	5,000	-	-
Romaks Technologies	9,040	-	-
Xingangxin	1,000	-	-

$5.21

1.4mA

Dw:Dm:M:Y

Alarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer

Alarm, Calendar, Clock, Timer Interrupt

Serial, Spi

1.27 mm

Gull Wing

64 b

SMD/SMT

Surface Mount

-40 C °C

2.7 V

Not Present

28-SOH

Yes

hh:mm:ss:hh

Clock/Calendar

2.5V ~ 3.5V

DS1302ZN+T&R

Analog Devices / Maxim Integrated

14,105

Across 4 distributors

Distributor	Stock	MOQ	Country
Fe Components	12,345	-	-
MW.FEP S.p.A.	10	-	-
PROSOFT ELECTRONICS	750	-	-
Xingangxin	1,000	-	-

Price on request

0.3µA ~ 1µA @ 2V ~ 5V

YY-MM-DD-dd

Leap Year, NVSRAM, Trickle-Charger

3-Wire Serial

31B

Surface Mount

-40°C ~ 85°C

8-SOIC

HH:MM:SS (12/24 hr)

Clock/Calendar

2V ~ 5.5V

DS1302

Analog Devices / Maxim Integrated

14,048

Across 3 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	10,255	-	-
Xingangxin	3,121	-	-
Smaxon Electronics	672	-	-

Price on request

0.3µA ~ 1µA @ 2V ~ 5V

YY-MM-DD-dd

Leap Year, NVSRAM, Trickle-Charger

3-Wire Serial

7.62 mm

31B

Through Hole

0°C ~ 70°C

8-PDIP

8-PDIP (300 mils)

HH:MM:SS (12/24 hr)

Clock/Calendar

2V ~ 5.5V

PCA85073ADP/Q900Z

NXP Semiconductors

13,920

Across 2 distributors

Distributor	Stock	MOQ	Country
Xingangxin	1,420	-	-
Smaxon Electronics	12,500	-	-

$5.21

YY-MM-DD-dd

Alarm

I²C

Surface Mount

-40°C ~ 105°C (TA)

8-TSSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

1.8V ~ 5.5V

PCF85363ATL/AX

NXP Semiconductors

13,919

Across 3 distributors

Distributor	Stock	MOQ	Country
Fe Components	4,000	-	-
Xingangxin	3,667	-	-
Smaxon Electronics	6,252	-	-

$5.21

0.28 µA

YY-MM-DD-dd

Alarm, Leap Year, Watchdog Timer; Two independent alarms; Battery back-up circuit; WatchDog timer; Three timestamp registers; Two independent interrupt generators plus predefined interrupts at every second, minute, or hour; 64 byte battery backed-up RAM; Frequency adjustment via programmable offset register

I²C, 2-Wire Serial

2.6 mm

64B

Surface Mount

-40 °C to 85 °C

10-DFN (2.6x2.6)

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

Clock/Calendar

0.9 V to 5.5 V

DS1339BU+T

Analog Devices / Maxim Integrated

13,908

From Romaks Technologies

Price on request

200µA

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, Trickle-Charger

I2C, 2-Wire Serial

3.00 mm

Surface Mount

-40°C / 85°C

8-uMAX/uSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V / 3.3V / 3.7V

DS12CR887-33+

Analog Devices / Maxim Integrated

13,500

Across 2 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	5,000	-	-
Xingangxin	8,500	-	-

Price on request

2mA @ 2.97V ~ 3.63V

YY-MM-DD-dd

Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger

Parallel

Three Independently Maskable Interrupt Flags

114B

Through Hole

-40°C

5.0V

24-EDIP

12/24 hr

Clock/Calendar

2V ~ 3.05V

DS1340C-33#

Analog Devices / Maxim Integrated

12,914

From Romaks Technologies

Price on request

150µA @ 5.5V

YY-MM-DD-dd

Leap Year, Trickle-Charger

I²C, 2-Wire Serial

Surface Mount

-40°C ~ 85°C

16-SOIC

16-SOIC (0.295", 7.50mm Width)

HH:MM:SS (24 hr)

Clock/Calendar

1.3V ~ 5.5V

PCA85063ATT/AJ

NXP Semiconductors

12,780

Across 3 distributors

Distributor	Stock	MOQ	Country
Bristol Electronics	16	-	-
Optech Co.,Limited	10,500	-	-
Xingangxin	2,264	-	-

$5.21

0.25μA

YY-MM-DD-dd

Alarm; Leap Year; Square Wave Output; Alarm function; Countdown timer; Minute and half minute interrupt; Oscillator stop detection function; Internal Power-On Reset (POR); Programmable offset register for frequency adjustment; Tracking time of the day; Accurate timing

400 kHz two-line I2C-bus

Surface Mount

-40°C ~ 105°C

8-TSSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

0.9V ~ 5.5V

M41T11M6F

STMicroelectronics

12,677

Across 3 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	3,600	-	-
Xingangxin	8,932	-	-
Smaxon Electronics	145	-	-

$3.00

70µA @ 2V

YY-MM-DD-dd

Leap Year, NVSRAM

I²C, 2-Wire Serial

3.90 mm

56 Bytes

Surface Mount

-40°C to 85°C

8-SOIC

HH:MM:SS

Clock/Calendar

2.5V to 3.5V

PCF2127T/2Y

NXP Semiconductors

12,667

Across 2 distributors

Distributor	Stock	MOQ	Country
Fe Components	9,000	-	-
Xingangxin	3,667	-	-

$5.21

1.5µA

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Watchdog Timer

I2C, SPI

7.50 mm

512B

Surface Mount

-40°C ~ 85°C

°C ~ °C

16-SO

HH:MM:SS (12/24 hr)

Clock/Calendar

1.8V ~ 4.2V

MCP79412T-I/SN

Microchip Technology

12,348

Across 2 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	5,748	-	-
Smaxon Electronics	6,600	-	-

$5.21

1.2µA @ 3.3V

Dw:Dm:M:Y

Alarm, Leap Year, Square Wave Output, SRAM, Unique ID

Calendar, Clock

I²C, 2-Wire Serial

3.9 mm

64B, 1Kb

Smd/Smt

Surface Mount

-40°C to +85°C

Real Time Clocks

8-SOIC

hh:mm:ss

Clock/Calendar

1.3V to 5.5V

M41T01M6F

STMicroelectronics

12,168

Across 3 distributors

Distributor	Stock	MOQ	Country
Fe Components	2,500	-	-
Xingangxin	7,030	-	-
Smaxon Electronics	2,638	-	-

$3.00

70µA @ 2V ~ 5.5V

YY-MM-DD-dd

Leap Year

I²C, 2-Wire Serial

0.154 mm

Surface Mount

-40°C ~ 85°C

8-SOIC

HH:MM:SS

Clock/Calendar

2.5V ~ 3.5V

PCF85063AT/AY

NXP Semiconductors

12,066

Across 3 distributors

Distributor	Stock	MOQ	Country
Optech Co.,Limited	6,844	-	-
Xingangxin	3,667	-	-
Smaxon Electronics	1,555	-	-

$5.21

0.22 μA at 3.3 V

YY-MM-DD-dd

Alarm; Leap Year; Square Wave Output; Countdown timer; Minute and half minute interrupt; Oscillator stop detection function; Internal Power-On Reset (POR); Programmable offset register for frequency adjustment

400 kHz I²C-bus

3.9 mm

Surface Mount

-40 °C to 85 °C

8-SO

HH:MM:SS (12/24 hr)

Clock/Calendar

0.9V ~ 5.5V

DS1558W

Analog Devices / Maxim Integrated

12,055

Across 2 distributors

Distributor	Stock	MOQ	Country
Speed Components Ltd	2	-	-
Romaks Technologies	12,053	-	-

Price on request

2mA @ 3.3V

YY-MM-DD-dd

Alarm, Leap Year, Watchdog Timer, Y2K; Integrated Real-Time Clock (RTC), Power-Fail Control Circuit, and NV RAM Controller; Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the 16 Top RAM Locations; Century Register; Greater than 10 Years of Timekeeping and Data Retention in the Absence of Power with Small Lithium Coin Cell(s) and Low-Leakage SRAM; Precision Power-On Reset; Programmable Alarm; BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100; Battery Voltage-Level Indicator Flag; Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance; Underwriters Laboratory (UL) Recognized

Parallel

7 mm

Surface Mount

-40°C to +85°C

5.0V

48-LQFP (7x7)

48-TQFP (7 x 7mm)

HH:MM:SS (24 hr)

Clock/Calendar

2.5V ~ 3.7V

PT7C4363BZEEX

Diodes Incorporated

11,800

From Tomark Electronics Ltd

$5.21

0.85µA ~ 0.9µA @ 3V ~ 5V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output

I2C, 2-Wire Serial

Surface Mount

-40°C ~ 85°C (TA)

°C ~ °C

8-TDFN (2x3)

1.3V

HH:MM:SS (24 hr)

Clock/Calendar

1.3V ~ 5.5V

DS1689SN

Analog Devices / Maxim Integrated

11,396

Across 2 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	2,356	-	-
Romaks Technologies	9,040	-	-

Price on request

2mA @ 3V, 3mA @ 5V

YY-MM-DD-dd

NVSRAM

Parallel

0.337 mm

114B

Surface Mount

-40°C ~ 85°C

28-SOIC

Tape & Reel

HH:MM:SS (12/24 hr)

Clock/Calendar

2.7V ~ 3.3V, 4.5V ~ 5.5V

M41ST85WMX6TR

STMicroelectronics

11,054

Across 3 distributors

Distributor	Stock	MOQ	Country
Fe Components	1,000	-	-
Romaks Technologies	9,040	-	-
Smaxon Electronics	1,014	-	-

$3.00

0.5mA

YY-MM-DD-dd

Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer

Alarm, Calendar, Clock, Supervisor

I²C, 2-Wire Serial

1.27 mm

Gull Wing

44B

Smd/Smt

Surface Mount

-40°C

Not Present

28-SO

2.7V

Yes

hh:mm:ss:hh

Clock/Calendar

2.5V

DS1339AU+

Analog Devices / Maxim Integrated

10,635

Across 2 distributors

Distributor	Stock	MOQ	Country
Romaks Technologies	10,635	-	-
HK XINYUANXIN ELECTRONIC TECH LIMITED	Stock on Request	-	-

Price on request

0.2mA

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, Trickle-Charger

I²C, 2-Wire Serial

Surface Mount

-40°C to 85°C

8-uMAX/uSOP

12/24 hr

Clock/Calendar

1.3V to 3.7V

M41T80M6F

STMicroelectronics

10,572

Across 4 distributors

Distributor	Stock	MOQ	Country
Fe Components	2,500	-	-
MW.FEP S.p.A.	5	-	-
Optech Co.,Limited	7,954	-	-
Smaxon Electronics	113	-	-

$3.00

2.4µA ~ 31µA @ 2V ~ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output

I²C, 2-Wire Serial

3.9 mm

Surface Mount

-40°C ~ 85°C

8-SOIC

HH:MM:SS:hh (24 hr)

Clock/Calendar

2V ~ 5.5V

M41T83ZQA6F

STMicroelectronics

10,565

Across 3 distributors

Distributor	Stock	MOQ	Country
Fe Components	1,000	-	-
Xingangxin	1,565	-	-
Smaxon Electronics	8,000	-	-

$5.21

10µA @ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer

I²C, 2-Wire Serial

Surface Mount

-40°C ~ 85°C

2.38V ~ 5.5V

16-QFN (4x4)

HH:MM:SS:hh (24 hr)

Clock/Calendar

2V ~ 5.5V

M41T64Q6F

STMicroelectronics

10,459

Across 2 distributors

Distributor	Stock	MOQ	Country
Optech Co.,Limited	7,479	-	-
Smaxon Electronics	2,980	-	-

$3.00

0.7µA ~ 0.95µA @ 1.3V ~ 4.4V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, Watchdog Timer

I²C, 2-Wire Serial

3x3 mm

Surface Mount

-40°C ~ 85°C

16-QFN (3x3)

HH:MM:SS:hh (24 hr)

Clock/Calendar

1.3V ~ 4.4V

DS1302Z+

Analog Devices / Maxim Integrated

10,250

Across 2 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	10,000	-	-
Speed Components Ltd	250	-	-

Price on request

0.3µA ~ 1µA @ 2V ~ 5V

YY-MM-DD-dd

Leap Year, NVSRAM, Trickle-Charger

3-Wire Serial

3.90 mm

31B

Surface Mount

0°C ~ 70°C

8-SOIC

8-SOIC (300 mils)

HH:MM:SS (12/24 hr)

Clock/Calendar

2V ~ 5.5V

BQ3285LFSS-A1TR

Texas Instruments

10,125

Across 3 distributors

Distributor	Stock	MOQ	Country
Optech Co.,Limited	8,500	-	-
PROSOFT ELECTRONICS	1,464	-	-
Smaxon Electronics	161	-	-

Price on request

100 µA @ 3V

YY-MM-DD-dd

Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output

Parallel

Gull Wing

242 B

Surface Mount

0°C ~ 70°C

24-SSOP

2.7V ~ 3.6V

Tape & Reel

HH:MM:SS (12/24 hr)

Clock/Calendar

2.4V ~ 4V

PCF8563T/5,518

NXP Semiconductors

10,101

Across 4 distributors

Distributor	Stock	MOQ	Country
Braun Electronic Components	10,000	-	-
MW.FEP S.p.A.	100	-	-
Trace Tec	1	-	-
HK XINYUANXIN ELECTRONIC TECH LIMITED	Stock on Request	-	-

$5.21

0.25 μA

YY-MM-DD-dd

Alarm, Leap Year, Watchdog Timer

I²C, 2-Wire Serial

0.154 mm

Surface Mount

-40°C ~ 85°C

8-SO

HH:MM:SS (24 hr)

Clock/Calendar

1.0 V to 5.5 V

DS1685EN-5

Analog Devices / Maxim Integrated

10,044

From Romaks Technologies

Price on request

3mA @ 5V

YY-MM-DD-dd

Alarm, NVSRAM, Square Wave Output, Y2K

Parallel

242B

Surface Mount

-40°C ~ 85°C

24-TSSOP

Tape & Reel

HH:MM:SS (12/24 hr)

Clock/Calendar

2.5V ~ 3.7V

DS1337C#T&R

Analog Devices / Maxim Integrated

10,000

From Components Technology Group, Inc.

Price on request

0.6µA @ 1.3V to 1.8V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output

I²C, 2-Wire Serial

Surface Mount

-40°C to 85°C

16-SOIC

16-SOIC (0.295", 7.50mm Width)

HH:MM:SS (12/24 hr)

Clock/Calendar

1.8V to 5.5V

DS12C887+

Analog Devices / Maxim Integrated

10,000

From Components Technology Group, Inc.

Price on request

15mA @ 4.5V ~ 5.5V

YY-MM-DD-dd

Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output

Parallel

15.24 mm

113B

Through Hole

0°C to 70°C

24-EDIP

HH:MM:SS (12/24 hr)

Clock/Calendar

2.5V to 4V

DS1305EN+T&R

Analog Devices / Maxim Integrated

10,000

From Components Technology Group, Inc.

Price on request

25.3µA

DD-MM-YY

Alarm, Leap Year, NVSRAM, Trickle-Charger

SPI

4.4 mm

96B

Surface Mount

-40°C

20-TSSOP

True

12/24 hr

Clock/Calendar

DS17287-5

Analog Devices / Maxim Integrated

9,923

Price on request

3mA @ 4.5V ~ 5.5V

YY-MM-DD-dd

Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output

Parallel

15.24 mm

2KB

Through Hole

0°C to 70°C

24-EDIP

HH:MM:SS (12/24 hr)

Clock/Calendar

2.5V to 3.7V

DS1337U+

Analog Devices / Maxim Integrated

9,741

Across 3 distributors

Distributor	Stock	MOQ	Country
Fe Components	6,655	-	-
Braun Electronic Components	71	1	-
Optech Co.,Limited	3,015	-	-

Price on request

0.6µA

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output

I²C, 2-Wire Serial

3.0 mm

Surface Mount

-40°C ~ 85°C

8-uMAX/uSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

1.8V ~ 5.5V

M41T62LC6F

STMicroelectronics

9,556

Across 4 distributors

Distributor	Stock	MOQ	Country
Fe Components	7,000	-	-
MW.FEP S.p.A.	8	-	-
Xingangxin	1,357	-	-
Smaxon Electronics	1,191	-	-

Price on request

0.7µA ~ 0.95µA @ 1.3V ~ 4.4V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, Watchdog Timer

I²C, 2-Wire Serial

Surface Mount

-40°C ~ 85°C

°C ~ °C

8-LCC (1.5x3.2)

HH:MM:SS:hh (24 hr)

Clock/Calendar

1.3V ~ 4.4V

MCP7940N-E/SN

Microchip Technology

9,388

$5.21

1.2µA @ 3.3V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM

I²C, 2-Wire Serial

64B

Surface Mount

-40°C ~ 125°C

8-SOIC

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V ~ 5.5V

DS3234S#

Analog Devices / Maxim Integrated

9,055

Across 2 distributors

Distributor	Stock	MOQ	Country
Romaks Technologies	9,040	-	-
Bristol Electronics	15	-	-

Price on request

120µA / 160µA

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal

SPI

256B

Surface Mount

0°C / 70°C

20-SOIC

HH:MM:SS (12/24 hr)

Clock/Calendar

2V / 3.8V

DS2404B

Analog Devices / Maxim Integrated

8,957

Across 2 distributors

Distributor	Stock	MOQ	Country
Components Technology Group, Inc.	2,500	-	-
Romaks Technologies	6,457	-	-

Price on request

500µA

Binary

Alarm, Square Wave Output, SRAM; Programmable alarms; 4096 bits of nonvolatile dual-port memory; 1-Wire interface; 3-wire host interface; Unique, factory-lasered and tested 64-bit registration number; Memory partitioned into 16 pages of 256-bits; 256-bit scratchpad; Programmable interval timer; Programmable power-on cycle counter

1-Wire

4096 bits

Surface Mount

-40°C

16-SSOP

Binary

Binary Counter

2.8V

BQ3285LDSS

Texas Instruments

8,500

Across 2 distributors

Distributor	Stock	MOQ	Country
Optech Co.,Limited	8,500	-	-
HK XINYUANXIN ELECTRONIC TECH LIMITED	Stock on Request	-	-

Price on request

100 µA

YY-MM-DD-dd

Alarm, Daylight Savings, NVSRAM, ACPI-compliant, 32.768kHz output, Battery Backup, Selectable Intel/Motorola bus timing

Parallel

242 B

Surface Mount

0°C ~ 70°C

Not Present

24-SSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

2.4V ~ 4V

RV-3149-C3-32.768KHZ-OPTION-B-TB-QA

Micro Crystal AG

8,258

From Optech Co.,Limited

$5.21

1µA @ 3V

YY-MM-DD-dd

Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger

SPI, 4-Wire Serial

2B, 8B

Surface Mount

-40°C ~ 125°C

10-SON (3.7x2.5)

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V ~ 5.5V

M48T58Y-70MH1E

STMicroelectronics

8,218

From Romaks Technologies

Price on request

3mA @ 4.5V ~ 5.5V

YY-MM-DD-dd

Leap Year

Parallel

Surface Mount

0°C ~ 70°C

Not Present

28-SOH

HH:MM:SS (24 hr)

Clock/Calendar

4.5V ~ 5.5V

MCP7940NT-I/SN

Microchip Technology

8,121

Across 5 distributors

Distributor	Stock	MOQ	Country
Braun Electronic Components	346	-	-
MW.FEP S.p.A.	346	-	-
Risen Electronics	100	-	-
Xingangxin	3,235	-	-
Smaxon Electronics	4,094	-	-

$5.21

1.2µA @ 3.3V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM

I²C, 2-Wire Serial

64B

Surface Mount

-40°C ~ 85°C

8-SOIC

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V ~ 5.5V

M48T35Y-70MH1F

STMicroelectronics

8,047

Across 4 distributors

Distributor	Stock	MOQ	Country
Fe Components	3,744	-	-
Xingangxin	1,718	-	-
Smaxon Electronics	2,585	-	-
HK XINYUANXIN ELECTRONIC TECH LIMITED	Stock on Request	-	-

$5.21

2mA @ 4.75V ~ 5.5V

YY-MM-DD-dd

Leap Year

Parallel

Through Hole

Surface Mount

0°C

4.5V

28-SOH

HH:MM:SS (24 hr)

Clock/Calendar

4.5V ~ 5.5V

MCP7940NT-I/MNY

Microchip Technology

7,953

$5.21

1.2µA @ 3.3V

YY-MM-DD-dd

Alarm, Leap Year, Square Wave Output, SRAM

I²C, 2-Wire Serial

64B

Surface Mount

-40°C ~ 85°C

8-TDFN (2x3)

HH:MM:SS (12/24 hr)

Clock/Calendar

1.3V ~ 5.5V

BQ4802YPW

Texas Instruments

7,927

Across 4 distributors

Distributor	Stock	MOQ	Country
MW.FEP S.p.A.	95	-	-
Romaks Technologies	5,615	-	-
Optech Co.,Limited	2,044	-	-
Smaxon Electronics	173	-	-

$5.21

1.5 mA (Typ) @ 4.5 V ~ 5.5 V

YY-MM-DD-dd

Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer; plus additional features from manufacturer

Real-time clock (RTC) / Calendar

Parallel

Surface Mount

0°C ~ 70°C

28-TSSOP

Gull Wing

HH:MM:SS (12/24 hr)

Clock/Calendar

2.4V ~ 4V

ISL12027IV27AZ

Intersil

7,910

From Optech Co.,Limited

Price on request

10µA ~ 20µA @ 2.7V ~ 5.5V

YY-MM-DD-dd

Alarm, Leap Year, Supervisor, Watchdog Timer

I²C, 2-Wire Serial

Surface Mount

-40°C ~ 85°C

8-TSSOP

HH:MM:SS (12/24 hr)

Clock/Calendar

1.8V ~ 5.5V

Showing 101-150 of 2,387 products

About Real Time Clocks

Real Time Clocks (RTCs) are essential components in a variety of electronic systems, providing accurate timekeeping and calendar functions. These integrated circuits are crucial for applications that require precise timing, such as data logging, embedded systems, and consumer electronics.

When selecting a Real Time Clock, it is important to consider key attributes such as current consumption, date format, and interface options. These specifications can significantly impact the performance and compatibility of the RTC within your design. Additionally, understanding the operating temperature range and memory size is vital for ensuring the component meets your application's requirements.

Real Time Clocks are commonly used in new product design and prototyping, production electronics assembly, and maintenance applications. Their versatility makes them suitable for a wide range of uses, from simple timers to complex time event recorders.

Before submitting a Request for Quotation (RFQ), buyers should compare critical specifications and validate the lifecycle status of the RTCs they are considering. It is also advisable to prioritize parametric filtering based on the specific needs of your project, rather than brand preference, to minimize sourcing risks.

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Real Time Clocks

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