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
RX-4803LC:UC3 PURE SN

RX-4803LC:UC3 PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803LC:UC3 PURE SN

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
DS17487-5

DS17487-5

IC RTC CLK/CALENDAR PAR 24EDIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17487-5

Datasheet

- 24-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 4KB 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 Through Hole - - 24-EDIP
DS17487-3

DS17487-3

IC RTC CLK/CALENDAR PAR 24EDIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS17487-3

Datasheet

- 24-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 4KB HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.7V 2.5V ~ 3.7V 2mA @ 2.7V ~ 3.7V 0°C ~ 70°C Through Hole - - 24-EDIP
RX-4803LC:UA3 PURE SN

RX-4803LC:UA3 PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803LC:UA3 PURE SN

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RX-4803LC:AAB PURE SN

RX-4803LC:AAB PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803LC:AAB PURE SN

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Strip Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RX-4803LC:UCB PURE SN

RX-4803LC:UCB PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803LC:UCB PURE SN

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Strip Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
M48T35AV-10MH1E

M48T35AV-10MH1E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

0 -
RFQ
M48T35AV-10MH1E

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V - 2mA @ 3V ~ 3.6V 0°C ~ 70°C Surface Mount - - 28-SOH
DP8573AN

DP8573AN

IC RTC CLK/CALENDAR PAR 24DIP

Texas Instruments

0 -
RFQ
DP8573AN

Datasheet

- 24-DIP (0.300", 7.62mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.2V ~ 5.1V 1µA @ 5V -40°C ~ 85°C Through Hole - - 24-DIP
M48T12-200PC1

M48T12-200PC1

IC RTC CLK/CALENDAR PAR 24DIP

STMicroelectronics

0 -
RFQ
M48T12-200PC1

Datasheet

Timekeeper® 24-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 24-PCDIP, CAPHAT®
M48T35AV-10MH6E

M48T35AV-10MH6E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

0 -
RFQ
M48T35AV-10MH6E

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V - 2mA @ 3V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-SOH
M48T35Y-70MH6E

M48T35Y-70MH6E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

0 -
RFQ
M48T35Y-70MH6E

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 2mA @ 4.75V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SOH
RX-4803LC:UA PURE SN

RX-4803LC:UA PURE SN

IC RTC CLK/CALENDAR SPI 12VSOJ

EPSON

0 -
RFQ
RX-4803LC:UA PURE SN

Datasheet

RX-4803LC 12-TFSOJ (0.094", 2.40mm Width) Strip Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd SPI 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
RX-8803LC:UA PURE SN

RX-8803LC:UA PURE SN

IC RTC CLK/CALENDAR I2C 12VSOJ

EPSON

0 -
RFQ
RX-8803LC:UA PURE SN

Datasheet

RX-8803LC 12-TFSOJ (0.094", 2.40mm Width) Bulk Active Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD I2C 1.6V ~ 5.5V - 2.1µA ~ 3.4µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 12-VSOJ
DS1501WEN+

DS1501WEN+

IC RTC CLK/CALENDAR PAR 28TSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501WEN+

Datasheet

- 28-TSSOP (0.465", 11.80mm Width) Tray Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K 256B HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V 2.5V ~ 3.7V 4mA @ 3V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-TSOP
M48T35Y-70MH1E

M48T35Y-70MH1E

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

0 -
RFQ
M48T35Y-70MH1E

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tube Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 2mA @ 4.75V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-SOH
DS1743P-100

DS1743P-100

IC RTC CLK/CALENDAR PAR 34PCM

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1743P-100

Datasheet

- 34-PowerCap™ Module Tube Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM, Y2K 8KB HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 3V 3mA @ 5V 0°C ~ 70°C Surface Mount - - 34-PowerCap Module
M48T37V-10MH6E

M48T37V-10MH6E

IC RTC CLK/CALENDAR PAR 44SOH

STMicroelectronics

0 -
RFQ
M48T37V-10MH6E

Datasheet

Timekeeper® 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 3V ~ 3.6V - 2mA @ 3V ~ 3.6V -40°C ~ 85°C Surface Mount - - 44-SOH
M48T37Y-70MH6E

M48T37Y-70MH6E

IC RTC CLK/CALENDAR PAR 44SOH

STMicroelectronics

0 -
RFQ
M48T37Y-70MH6E

Datasheet

Timekeeper® 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 3mA @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 44-SOH
M48T59Y-70MH1F

M48T59Y-70MH1F

IC RTC CLK/CALENDAR PAR 28SOH

STMicroelectronics

0 -
RFQ
M48T59Y-70MH1F

Datasheet

Timekeeper® 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 3mA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-SOH
DP8573AVX/NOPB

DP8573AVX/NOPB

IC RTC CLK/CALENDAR PAR 28PLCC

Texas Instruments

0 -
RFQ
DP8573AVX/NOPB

Datasheet

- 28-LCC (J-Lead) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.2V ~ 5.1V 1µA @ 5V -40°C ~ 85°C Surface Mount - - 28-PLCC (11.51x11.51)
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