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
BQ3287EAMT

BQ3287EAMT

IC RTC CLOCK/CALENDAR PAR 24DIP

Texas Instruments

0 -
RFQ
BQ3287EAMT Datasheet - 24-DIP Module (0.61", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - - 0°C ~ 70°C Through Hole - - 24-DIP Module
BQ3287EMT

BQ3287EMT

IC RTC CLOCK/CALENDAR PAR 24DIP

Texas Instruments

0 -
RFQ
BQ3287EMT Datasheet - 24-DIP Module (0.61", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 242B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - - 0°C ~ 70°C Through Hole - - 24-DIP Module
BQ4822YMA-70

BQ4822YMA-70

IC RTC CLK/CALENDAR PAR 28-DIP

Texas Instruments

0 -
RFQ
BQ4822YMA-70 Datasheet - 28-DIP Module (0.61", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 6mA @ 2.2 V ~ 5.8 V 0°C ~ 70°C Through Hole - - 28-DIP Module (18.42x37.72)
BQ4842YMA-85

BQ4842YMA-85

IC RTC CLK/CALENDAR PAR 32DIP

Texas Instruments

0 -
RFQ
BQ4842YMA-85 Datasheet - 32-DIP Module (0.610", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Supervisor, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 4mA @ 4.5 V ~ 5.5 V 0°C ~ 70°C Through Hole - - 32-DIP Module (18.42x42.8)
BQ4845S-A4N

BQ4845S-A4N

IC RTC CLK/CALENDAR PAR 28SOIC

Texas Instruments

0 -
RFQ
BQ4845S-A4N Datasheet - 28-SOIC (0.295", 7.50mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.75V ~ 5.5V 2.3V ~ 4V 1.5mA (Typ) @ 4.5 V ~ 5.5 V -40°C ~ 85°C Surface Mount - - 28-SOIC
BQ4847MT

BQ4847MT

IC RTC CLK/CALENDAR PAR 28-DIP

Texas Instruments

0 -
RFQ
BQ4847MT Datasheet - 28-DIP Module (0.61", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.75V ~ 5.25V 2.3V ~ 4V - 0°C ~ 70°C Through Hole - - 28-DIP Module
BQ4847YMT

BQ4847YMT

IC RTC CLK/CALENDAR PAR 28-DIP

Texas Instruments

0 -
RFQ
BQ4847YMT Datasheet - 28-DIP Module (0.61", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.3V ~ 4V - 0°C ~ 70°C Through Hole - - 28-DIP Module
BQ4850YMA-85

BQ4850YMA-85

IC RTC CLK/CALENDAR PAR 32DIP

Texas Instruments

0 -
RFQ
BQ4850YMA-85 Datasheet - 32-DIP Module (0.610", 15.49mm) Tube Obsolete Not Verified Clock/Calendar Alarm - HH:MM:SS (24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 1mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 32-DIP Module (18.42x42.8)
X1226S8

X1226S8

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
X1226S8 Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Obsolete 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 ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
X1227S8

X1227S8

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
X1227S8 Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 1.8V ~ 5.5V 10µA ~ 20µA @ 2.7V ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
X1227S8-2.7

X1227S8-2.7

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
X1227S8-2.7 Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
X1227S8-2.7A

X1227S8-2.7A

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
X1227S8-2.7A Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
X1227S8-4.5A

X1227S8-4.5A

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

0 -
RFQ
X1227S8-4.5A Datasheet - 8-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 1.8V ~ 5.5V 10µA ~ 20µA @ 2.7V ~ 5V 0°C ~ 70°C Surface Mount - - 8-SOIC
X1228S14

X1228S14

IC RTC CLK/CALENDAR I2C 14SOIC

Renesas Electronics Corporation

0 -
RFQ
X1228S14 Datasheet - 14-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 14-SOIC
X1228S14-2.7

X1228S14-2.7

IC RTC CLK/CALENDAR I2C 14SOIC

Renesas Electronics Corporation

0 -
RFQ
X1228S14-2.7 Datasheet - 14-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 14-SOIC
X1228S14-2.7A

X1228S14-2.7A

IC RTC CLK/CALENDAR I2C 14SOIC

Renesas Electronics Corporation

0 -
RFQ
X1228S14-2.7A Datasheet - 14-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 14-SOIC
X1228S14-4.5A

X1228S14-4.5A

IC RTC CLK/CALENDAR I2C 14SOIC

Renesas Electronics Corporation

0 -
RFQ
X1228S14-4.5A Datasheet - 14-SOIC (0.154", 3.90mm Width) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, Supervisor, Watchdog Timer - 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 ~ 5V 0°C ~ 70°C Surface Mount - - 14-SOIC
DS1511W

DS1511W

IC RTC CLK/CALENDAR PAR 28EDIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1511W Datasheet - 28-DIP Module (0.600", 15.24mm) Tube 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 0°C ~ 70°C Through Hole - - 28-EDIP
DS14285Q

DS14285Q

IC RTC CLK/CALENDAR PAR 28PLCC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS14285Q Datasheet - 28-LCC (J-Lead) Tube Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V 2.5V ~ 3.6V 0.5µA @ 4.5V ~ 5.5V 0°C ~ 70°C Surface Mount - - 28-PLCC (11.51x11.51)
DS1307

DS1307

IC RTC CLOCK/CALENDAR I2C 8DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1307 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 0°C ~ 70°C Through Hole - - 8-PDIP
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