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
EM3028C7B+

EM3028C7B+

IC RTC CLOCK/CALENDAR I2C SMD

EM Microelectronic

0 -
RFQ

-

- 8-SMD Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Square Wave Output, Trickle-Charger 43B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C 1.1V, 1.2V, 2V ~ 5.5V 1.1V ~ 5.5V 0.4µA @ 5V -40°C ~ 85°C (TA) Surface Mount - - SMD
1339-31DCGI8

1339-31DCGI8

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
1339-31DCGI8

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3.3V ~ 5.5V 1.3V ~ 3.7V 200µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
RX-8035SA:AC0 PURE SN

RX-8035SA:AC0 PURE SN

IC RTC TIME EVENT REC I2C 14SOP

EPSON

0 -
RFQ
RX-8035SA:AC0 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
DS1306E/T&R

DS1306E/T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1306E/T&R

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 20-TSSOP
DS1305E/T&R

DS1305E/T&R

IC RTC CLK/CALENDAR SPI 20TSSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1305E/T&R

Datasheet

- 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Trickle-Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2V ~ 5.5V 2V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V 0°C ~ 70°C Surface Mount - - 20-TSSOP
RV-8564-C3-32.768KHZ-10PPM-TA-QC

RV-8564-C3-32.768KHZ-10PPM-TA-QC

IC RTC CLK/CALENDAR I2C 10SON

Micro Crystal AG

0 -
RFQ
RV-8564-C3-32.768KHZ-10PPM-TA-QC

Datasheet

C3 10-VCDFN Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Programmable Clock Output, Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.35µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SON (3.7x2.5)
PT7C4302WEX

PT7C4302WEX

IC RTC CLK/CALENDAR SER 8SOIC

Diodes Incorporated

6 -
RFQ
PT7C4302WEX

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output, Trickle-Charger 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.2V ~ 5.5V 1.5V ~ 5.5V 25.3µA ~ 81µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 8-SOIC
RX-8035SA:AA0:PURE SN

RX-8035SA:AA0:PURE SN

IC RTC TIME EVENT REC I2C 14SOP

EPSON

0 -
RFQ
RX-8035SA:AA0:PURE SN

Datasheet

RX-8035SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Obsolete 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
ISL1219IUZ-T

ISL1219IUZ-T

IC RTC EVENT REC I2C 10MSOP

Renesas Electronics Corporation

0 -
RFQ
ISL1219IUZ-T

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Time Event Recorder 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 - - 10-MSOP
PT7C4307WEX

PT7C4307WEX

IC RTC CLK/CALENDAR I2C 8SOIC

Diodes Incorporated

0 -
RFQ
PT7C4307WEX

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 1.5mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12026AIBZ-T

ISL12026AIBZ-T

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
ISL12026AIBZ-T

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 10µA ~ 20µA @ 2.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
RX-8803SAUC0 PURE SN

RX-8803SAUC0 PURE SN

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

0 -
RFQ
RX-8803SAUC0 PURE SN

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
RX-8803SA UB0 PURE SN

RX-8803SA UB0 PURE SN

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

0 -
RFQ
RX-8803SA UB0 PURE SN

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
RX-4803SAUB0 PURE SN

RX-4803SAUB0 PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803SAUB0 PURE SN

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
RX-8025SAAA0 PURE SN

RX-8025SAAA0 PURE SN

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

0 -
RFQ
RX-8025SAAA0 PURE SN

Datasheet

RX-8025SA 14-SOIC (0.197", 5.00mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd I2C 1.7V ~ 5.5V - 1.2µA ~ 1.8µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 14-SOP
RX-8025SAAC0 PURE SN

RX-8025SAAC0 PURE SN

IC RTC CLK/CALENDAR I2C 14SOP

EPSON

0 -
RFQ
RX-8025SAAC0 PURE SN

Datasheet

- - Tape & Reel (TR) Active - - - - - - - - - - - - - - -
DS1307ZN

DS1307ZN

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1307ZN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 200µA @ 5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1302N

DS1302N

IC RTC CLK/CALENDAR SER 8DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302N

Datasheet

- 8-DIP (0.300", 7.62mm) 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 Through Hole - - 8-PDIP
DS1302SN

DS1302SN

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1302SN

Datasheet

- 8-SOIC (0.209", 5.30mm 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
DS1307N

DS1307N

IC RTC CLOCK/CALENDAR I2C 8DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1307N

Datasheet

- 8-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Square Wave Output 56B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2V ~ 3.5V 200µA @ 5V -40°C ~ 85°C Through Hole - - 8-PDIP
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