Real Time Clocks

Manufacturer Series Package/Case Packaging Product Status Programmable Type Features Memory Size Time Format Date Format Interface Voltage - Supply Voltage - Supply, Battery Current - Timekeeping (Max) Operating Temperature Mounting Type Grade Qualification Supplier Device Package

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Real Time Clock (RTC) ICs are timing components used to maintain accurate time and calendar information in electronic systems, even when the main power is turned off. They are widely used in embedded systems, industrial control, consumer electronics, communication equipment, medical devices, automotive electronics, IoT products, meters and data logging applications.

This category includes real time clock ICs, battery-backed RTCs, low-power RTCs, I2C RTCs, SPI RTCs, calendar clock ICs and related clock/timing components. These devices are commonly selected based on timekeeping accuracy, backup power support, interface type, alarm functions, operating voltage, current consumption, package type and application requirements.

TomatoElec supplies original Real Time Clock RTC ICs from recognized semiconductor manufacturers such as Microchip, NXP, STMicroelectronics, Renesas, Texas Instruments, Analog Devices, onsemi, Infineon and other major brands. As an in-stock electronic components supplier and independent distributor, TomatoElec provides inventory support, original component sourcing and BOM sourcing services for global customers.

Photo Mfr. Part # Availability Price Quantity Datasheet Series Package/Case Packaging Product Status Programmable Type Features Memory Size Time Format Date Format Interface Voltage - Supply Voltage - Supply, Battery Current - Timekeeping (Max) Operating Temperature Mounting Type Grade Qualification Supplier Device Package
DS17885S-5+

DS17885S-5+

IC RTC CLK/CALENDAR PAR 24SOIC

Analog Devices Inc./Maxim Integrated

102 -
RFQ
DS17885S-5+

Datasheet

- 24-SOIC (0.295", 7.50mm Width) Tube Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 8KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 24-SOIC
DS1315E-5+

DS1315E-5+

IC RTC PHANTOM CHIP PAR 20TSSOP

Analog Devices Inc./Maxim Integrated

18 -
RFQ
DS1315E-5+

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Phantom Time Chip Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.7V 1.3mA @ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
DS1747WP-120+

DS1747WP-120+

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

77 -
RFQ
DS1747WP-120+

Datasheet

- 34-PowerCap™ Module Tray Active Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 2mA @ 3.3V 0°C ~ 70°C Surface Mount - - 34-PowerCap Module
DS1747W-120+

DS1747W-120+

IC RTC CLK/CALENDAR PAR 32EDIP

Analog Devices Inc./Maxim Integrated

264 -
RFQ
DS1747W-120+

Datasheet

- 32-DIP Module (0.600", 15.24mm) Tube Active Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V - 2mA @ 3.3V 0°C ~ 70°C Through Hole - - 32-EDIP
DS1557WP-120IND+

DS1557WP-120IND+

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

84 -
RFQ
DS1557WP-120IND+

Datasheet

- 34-PowerCap™ Module Tray Active Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K 512KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 2.97V ~ 3.63V 3V 4mA @ 3.3V -40°C ~ 85°C Surface Mount - - 34-PowerCap Module
MCP79400T-I/MNY

MCP79400T-I/MNY

IC RTC CLK/CALENDAR I2C 8TDFN

Microchip Technology

4,059 -
RFQ
MCP79400T-I/MNY

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA (Typ) @ 3.3V -40°C ~ 85°C Surface Mount - - 8-TDFN (2x3)
RX8130CE B6

RX8130CE B6

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

1,864 -
RFQ
RX8130CE B6

Datasheet

RX8130CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Watchdog Timer - HH:MM:SS YY-MM-DD I2C 1.25V ~ 5.5V 1.1V ~ 5.5V 4µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SMD
BU9873NUX-TTR

BU9873NUX-TTR

IC RTC CLK/CALENDAR I2C 8VSON

Rohm Semiconductor

9,119 -
RFQ
BU9873NUX-TTR

Datasheet

- 8-UFDFN Exposed Pad Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - VSON008X2030
BU9873FVT-GE2

BU9873FVT-GE2

IC RTC CLK/CALENDAR I2C 8TSSOP

Rohm Semiconductor

5,505 -
RFQ
BU9873FVT-GE2

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-TSSOP-B
1338D-31DVGI

1338D-31DVGI

1338D-31 REAL TIME CLOCK

Renesas Electronics Corporation

384 -
RFQ
1338D-31DVGI

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active - Clock/Calendar Leap Year, RAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 3.3V ~ 5.5V 1.3V ~ 3.7V 2µA @ 3.63V -40°C ~ 85°C (TA) Surface Mount - - 8-TSSOP
BU9873F-GTE2

BU9873F-GTE2

IC RTC CLOCK/CALENDAR I2C 8SOP

Rohm Semiconductor

281 -
RFQ
BU9873F-GTE2

Datasheet

- 8-SOIC (0.173", 4.40mm Width) Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA ~ 1.35µA @ 3V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOP
MCP795W21-I/ST

MCP795W21-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

192 -
RFQ
MCP795W21-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer 64B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.8V ~ 3.6V 1.3V ~ 3.6V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
AM0815AQ

AM0815AQ

RTC ARTASIE SPI LO PWR 16QFN

Ambiq Micro, Inc.

8,736 -
RFQ
AM0815AQ

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
AM0805AQ

AM0805AQ

RTC ARTASIE I2C LO PWR 16QFN

Ambiq Micro, Inc.

8,285 -
RFQ
AM0805AQ

Datasheet

- 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
RV-8263-C8-32.768KHZ-20PPM-TA-QC

RV-8263-C8-32.768KHZ-20PPM-TA-QC

IC RTC CLK/CALENDAR I2C 8-SMT

Micro Crystal AG

798 -
RFQ
RV-8263-C8-32.768KHZ-20PPM-TA-QC

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 8-SON (2x1.2)
RV-8063-C8-32.768KHZ-20PPM-TA-QC

RV-8063-C8-32.768KHZ-20PPM-TA-QC

IC RTC CLK/CALENDAR SPI 8-SMT

Micro Crystal AG

984 -
RFQ
RV-8063-C8-32.768KHZ-20PPM-TA-QC

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI, 3-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 8-SON (2x1.2)
AM1815AQ

AM1815AQ

RTC ARTASIE SPI W/PWR MNGT 16QFN

Ambiq Micro, Inc.

5,831 -
RFQ
AM1815AQ

Datasheet

Artasie 16-VFQFN Exposed Pad Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Supervisor, Trickle Charger, Unique ID, Watchdog Timer 256B HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 1.5V ~ 3.6V 1.4V ~ 3.6V 0.17µA ~ 0.22µA @ 1.8V ~ 3V -40°C ~ 85°C (TA) Surface Mount - - 16-QFN (3x3)
RV-8063-C8-32.768KHZ-20PPM-TA-QA

RV-8063-C8-32.768KHZ-20PPM-TA-QA

IC RTC CLK/CALENDAR SPI 8-SMT

Micro Crystal AG

992 -
RFQ
RV-8063-C8-32.768KHZ-20PPM-TA-QA

Datasheet

C8 8-WCDFN Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer 1B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI, 3-Wire Serial 0.9V ~ 5.5V - 0.24µA @ 3V -40°C ~ 85°C (TA) Surface Mount Automotive AEC-Q200 8-SON (2x1.2)
1337AGDVGI

1337AGDVGI

IC RTC CLK/CALENDAR I2C 8TSSOP

Renesas Electronics Corporation

250 -
RFQ
1337AGDVGI

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.3µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-TSSOP
DS1672S-2+

DS1672S-2+

IC RTC BINARY COUNTER I2C 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1672S-2+

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Binary Counter Trickle-Charger - Binary Binary I2C, 2-Wire Serial 1.8V ~ 2.2V 1.3V ~ 3.63V 500µA @ 2.2V -40°C ~ 85°C Surface Mount - - 8-SOIC
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