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
R2051S02-E2-F

R2051S02-E2-F

HIGH PRECISION I2C-BUS REAL-TIME

Nisshinbo Micro Devices Inc.

0 -
RFQ
R2051S02-E2-F

Datasheet

* - Tape & Reel (TR) Active Not Verified - - - - - - - - - - - - - -
R2051S03-E2-F

R2051S03-E2-F

HIGH PRECISION I2C-BUS REAL-TIME

Nisshinbo Micro Devices Inc.

0 -
RFQ
R2051S03-E2-F

Datasheet

* - Tape & Reel (TR) Active Not Verified - - - - - - - - - - - - - -
S-35390AH-J8T2U

S-35390AH-J8T2U

LINEAR IC

ABLIC Inc.

0 -
RFQ
S-35390AH-J8T2U

Datasheet

S-35390A H 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 2-Wire Serial 1.3V ~ 5.5V 1.3V ~ 5.5V 1.2µA ~ 1.4µA @ 3V ~ 5V -40°C ~ 105°C (TA) Surface Mount - - 8-SOP-J
S-35390AH-T8T2U

S-35390AH-T8T2U

LINEAR IC

ABLIC Inc.

0 -
RFQ
S-35390AH-T8T2U

Datasheet

S-35390A H 8-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 2-Wire Serial 1.3V ~ 5.5V 1.3V ~ 5.5V 1.2µA ~ 1.4µA @ 3V ~ 5V -40°C ~ 105°C (TA) Surface Mount - - 8-TSSOP
S-35190AH-J8T2U

S-35190AH-J8T2U

LINEAR IC

ABLIC Inc.

0 -
RFQ
S-35190AH-J8T2U

Datasheet

S-35190A H 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.3V ~ 5.5V 1.3V ~ 5.5V 1.2µA ~ 1.4µA @ 3V ~ 5V -40°C ~ 105°C (TA) Surface Mount - - 8-SOP-J
S-35190AH-T8T2U

S-35190AH-T8T2U

LINEAR IC

ABLIC Inc.

0 -
RFQ
S-35190AH-T8T2U

Datasheet

S-35190A H 8-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active - Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.3V ~ 5.5V 1.3V ~ 5.5V 1.2µA ~ 1.4µA @ 3V ~ 5V -40°C ~ 105°C (TA) Surface Mount - - 8-TSSOP
MCP79400T-I/ST

MCP79400T-I/ST

IC RTC CLK/CALENDAR I2C 8TSSOP

Microchip Technology

0 -
RFQ
MCP79400T-I/ST

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) 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-TSSOP
S-35199A01-HRT1

S-35199A01-HRT1

IC RTC CLK/CALENDAR SER 12UFBGA

ABLIC Inc.

0 -
RFQ

-

- 12-UFBGA, WLBGA Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd 3-Wire Serial 1.3V ~ 5.5V - 8µA ~ 14µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-UFBGA, WLBGA
S-35399A02-HRT1

S-35399A02-HRT1

IC RTC CLK/CALENDAR I2C 12UFBGA

ABLIC Inc.

0 -
RFQ

-

- 12-UFBGA, WLBGA 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 1.3V ~ 5.5V - 14µA ~ 30µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-UFBGA, WLBGA
MCP79401T-I/SN

MCP79401T-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

0 -
RFQ
MCP79401T-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) 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-SOIC
MCP79402T-I/SN

MCP79402T-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

0 -
RFQ
MCP79402T-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) 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-SOIC
PT7C4563WEX

PT7C4563WEX

IC RTC CLK/CALENDAR I2C 8SOIC

Diodes Incorporated

0 -
RFQ
PT7C4563WEX

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 0.65µA ~ 0.85µA @ 3V ~ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-SOIC
PT7C4311ZEE+DMX

PT7C4311ZEE+DMX

IC RTC CLK/CALENDAR I2C 8TDFN

Diodes Incorporated

0 -
RFQ
PT7C4311ZEE+DMX

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, Square Wave Output, Y2K 56B HH:MM:SS (24 hr) YY-MM-DD I2C, 2-Wire Serial 1.2V ~ 5.5V 2V ~ 3.5V 150µA @ 1.5V ~ 5.5V -40°C ~ 85°C (TA) Surface Mount - - 8-TDFN (2x3)
S-35399A03-J8T2G

S-35399A03-J8T2G

IC RTC CLOCK/CALENDAR I2C 8SOP

ABLIC Inc.

0 -
RFQ
S-35399A03-J8T2G

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 1.3V ~ 5.5V - 14µA ~ 30µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-SOP-J
RX8111CE A6

RX8111CE A6

IC RTC CLK/CALENDAR I2C 10SMD

EPSON

0 -
RFQ
RX8111CE A6

Datasheet

RX8111CE 10-SMD, No Lead Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V 1.1V ~ 5.5V 3µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SMD
MCP79401T-I/ST

MCP79401T-I/ST

IC RTC CLK/CALENDAR I2C 8TSSOP

Microchip Technology

0 -
RFQ
MCP79401T-I/ST

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) 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-TSSOP
MCP79401T-I/MS

MCP79401T-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

0 -
RFQ
MCP79401T-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 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-MSOP
MCP79402T-I/ST

MCP79402T-I/ST

IC RTC CLK/CALENDAR I2C 8TSSOP

Microchip Technology

0 -
RFQ
MCP79402T-I/ST

Datasheet

- 8-TSSOP (0.173", 4.40mm Width) 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-TSSOP
MCP79402T-I/MS

MCP79402T-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

0 -
RFQ
MCP79402T-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 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-MSOP
PT7C4563UEX

PT7C4563UEX

IC RTC CLK/CALENDAR I2C 8MSOP

Diodes Incorporated

0 -
RFQ
PT7C4563UEX

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 0.65µA ~ 0.85µA @ 3V ~ 5V -40°C ~ 85°C (TA) Surface Mount - - 8-MSOP
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