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
MCP795B21-I/ST

MCP795B21-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795B21-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
MCP795B22-I/ST

MCP795B22-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

0 -
RFQ
MCP795B22-I/ST

Datasheet

- 14-TSSOP (0.173", 4.40mm Width) Tube Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-TSSOP
PT7C4363BQ1WEX

PT7C4363BQ1WEX

IC RTC CLK/CALENDAR I2C 8SOIC

Diodes Incorporated

0 -
RFQ
PT7C4363BQ1WEX

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd I2C, SMBus 1.3V ~ 5.5V 3V 1.5µA @ 5V -40°C ~ 125°C Surface Mount Automotive AEC-Q100 8-SOIC
MCP795B21-I/SL

MCP795B21-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

0 -
RFQ
MCP795B21-I/SL

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tube Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
MCP795B22-I/SL

MCP795B22-I/SL

IC RTC CLK/CALENDAR SPI 14SOIC

Microchip Technology

0 -
RFQ
MCP795B22-I/SL

Datasheet

- 14-SOIC (0.154", 3.90mm Width) Tube Obsolete 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 ~ 5.5V 1.3V ~ 5.5V 1µA @ 1.8V ~ 5.5V -40°C ~ 85°C Surface Mount - - 14-SOIC
RX-8035SAB0 PURE SN

RX-8035SAB0 PURE SN

IC RTC TIME EVENT REC I2C 14SOP

EPSON

0 -
RFQ
RX-8035SAB0 PURE SN

Datasheet

RX-8035SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active Not Verified Time Event Recorder Alarm - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.4V ~ 5.5V 1V ~ 5.5V 2.5µA @ 3V -40°C ~ 85°C Surface Mount - - 14-SOP
BU9873FJ-GTE2

BU9873FJ-GTE2

IC RTC CLOCK/CALENDAR I2C 8SOP

Rohm Semiconductor

0 -
RFQ
BU9873FJ-GTE2

Datasheet

- 8-SOIC (0.154", 3.90mm 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-J
DS1302ZN

DS1302ZN

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302ZN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V 2V ~ 5.5V 0.3µA ~ 1µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 8-SOIC
MCP795W12-I/ST

MCP795W12-I/ST

IC RTC CLK/CALENDAR SPI 14TSSOP

Microchip Technology

7 -
RFQ
MCP795W12-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
RX-4571LCB0 PURE SN

RX-4571LCB0 PURE SN

RX-4571LC:B0 RTC {SN-AG OR SN} V

EPSON

0 -
RFQ
RX-4571LCB0 PURE SN

Datasheet

RX-4571LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS YY-MM-DD 3-Wire Serial 1.6V ~ 5.5V 1V ~ 5.5V 0.95µA ~ 1µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RV-8803-C7-TA-QC

RV-8803-C7-TA-QC

IC RTC CLK/CALENDAR I2C 8SON

EM Microelectronic

0 -
RFQ

-

- 8-WCDFN Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, RAM - HH:MM:SS YY-MM-DD-dd I2C 1.5V ~ 5.5V - 0.35µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 8-SON (3.2x1.5)
M41T11M6E

M41T11M6E

IC RTC CLK/CALENDAR I2C 8SOIC

STMicroelectronics

0 -
RFQ
M41T11M6E

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM 56B HH:MM:SS YY-MM-DD-dd I2C, 2-Wire Serial 2V ~ 5.5V 2.5V ~ 3.5V 70µA @ 2V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL1208IU8-TK

ISL1208IU8-TK

IC RTC CLK/CALENDAR I2C 8MSOP

Renesas Electronics Corporation

0 -
RFQ
ISL1208IU8-TK

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, SRAM 2B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 4µA ~ 6µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-MSOP
V3021DL8A+

V3021DL8A+

LINEAR IC

EM Microelectronic

0 -
RFQ

-

- 8-DIP (0.300", 7.62mm) Tube Active - Clock/Calendar Leap Year, RAM 1B HH:MM:SS YY-MM-DD-dd 3-Wire Serial 2V ~ 5.5V - 1.8µA @ 5V -40°C ~ 85°C (TA) Through Hole - - 8-DIP
MAX31329NELB+T

MAX31329NELB+T

INTEGRATED RC17 W/ NDK CRYSTAL

Analog Devices Inc./Maxim Integrated

0 -
RFQ
MAX31329NELB+T

Datasheet

- 10-LLGA Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 1.6V ~ 5.5V 1.6V ~ 5.5V 0.5µA ~ 0.7µA @ 1.6V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-LGA (5x5)
RTC-4574SA:B0 ROHS

RTC-4574SA:B0 ROHS

IC RTC CLK/CALENDAR SER 14SOP

EPSON

0 -
RFQ
RTC-4574SA:B0 ROHS

Datasheet

RTC-4574SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd 3-Wire Serial 1.6V ~ 5.5V - 1µA ~ 2µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
DS2415P+

DS2415P+

IC RTC BINARY CNTR 1-WIRE 6TSOC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS2415P+

Datasheet

- 6-SMD, J-Lead Tube Obsolete Not Verified Binary Counter Unique ID - Binary Binary 1-Wire® Serial 2.5V ~ 5.5V 2.5V ~ 5.5V 0.25µA ~ 0.45µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 6-TSOC
RTC-4543SA:A0 ROHS

RTC-4543SA:A0 ROHS

IC RTC CLK/CALENDAR SER 14SOP

EPSON

0 -
RFQ
RTC-4543SA:A0 ROHS

Datasheet

RTC-4543SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd 3-Wire Serial 2.5V ~ 5.5V - 1µA ~ 3µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
RX-8581SA:B0

RX-8581SA:B0

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

0 -
RFQ
RX-8581SA:B0

Datasheet

RX-8581SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.8µA ~ 1.2µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
RX8130CE:BB

RX8130CE:BB

IC RTC TIME EVENT REC I2C 10SMD

EPSON

0 -
RFQ
RX8130CE:BB

Datasheet

RX8130CE 10-SMD, No Lead Bulk Active Not Verified Time Event Recorder Alarm - - - I2C 1.25V ~ 5.5V - 0.5µA @ 3V -40°C ~ 85°C Surface Mount - - 10-SMD
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