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
MAX6917EO30+T

MAX6917EO30+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.3V - - -40°C ~ 85°C Surface Mount - - 20-QSOP
MAX6917EO50+T

MAX6917EO50+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ

-

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V - - -40°C ~ 85°C Surface Mount - - 20-QSOP
MAX6909EO30+T

MAX6909EO30+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
MAX6909EO30+T

Datasheet

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.3V - - - Surface Mount - - 20-QSOP
MAX6909EO33+T

MAX6909EO33+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
MAX6909EO33+T

Datasheet

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3V ~ 3.6V - - - Surface Mount - - 20-QSOP
ISL12022MIBZ-T7A

ISL12022MIBZ-T7A

IC RTC CLK/CALENDAR I2C 20SOIC

Renesas Electronics Corporation

0 -
RFQ

-

- 20-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, SRAM 128B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 14µA ~ 15µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 20-SOIC
M41ST85WMH6TR

M41ST85WMH6TR

IC RTC CLK/CALENDAR I2C 28SOH

STMicroelectronics

0 -
RFQ
M41ST85WMH6TR

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer 44B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.6V 2.5V ~ 3.5V 0.5mA @ 2.7V ~ 3.6V -40°C ~ 85°C Surface Mount - - 28-SOH
DS1689S

DS1689S

IC RTC CLK/CALENDAR PAR 28SOIC

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1689S

Datasheet

- 28-SOIC (0.337", 8.56mm Width) Tube Obsolete Not Verified Clock/Calendar NVSRAM 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.3V, 4.5V ~ 5.5V 2.5V ~ 3.7V 2mA @ 3V, 3mA @ 5V 0°C ~ 70°C Surface Mount - - 28-SOIC
DS1501Y

DS1501Y

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501Y

Datasheet

- 28-DIP (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 4.5V ~ 5.5V 2.5V ~ 3.7V 5mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 28-PDIP
DS1501W

DS1501W

IC RTC CLK/CALENDAR PAR 28DIP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1501W

Datasheet

- 28-DIP (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-PDIP
MAX6910EO33+T

MAX6910EO33+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
MAX6910EO33+T

Datasheet

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 3V ~ 3.6V - - - Surface Mount - - 20-QSOP
MAX6910EO30+T

MAX6910EO30+T

IC RTC CLK/CAL/SUPER I2C 20QSOP

Analog Devices Inc./Maxim Integrated

0 -
RFQ
MAX6910EO30+T

Datasheet

- 20-SSOP (0.154", 3.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar/Supervisor - 31B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 3.3V - - - Surface Mount - - 20-QSOP
M48T86PC1

M48T86PC1

IC RTC CLK/CALENDAR PAR 24-DIP

STMicroelectronics

0 -
RFQ
M48T86PC1

Datasheet

- 24-DIP Module (0.600", 15.24mm) Tube Obsolete Not Verified Clock/Calendar Alarm, Leap Year, NVSRAM, Square Wave Output 114B HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 15mA @ 4.5V ~ 5.5V 0°C ~ 70°C Through Hole - - 24-PCDIP, CAPHAT®
M41T56MH6F

M41T56MH6F

IC RTC CLK/CALENDAR I2C 28SOH

STMicroelectronics

0 -
RFQ
M41T56MH6F

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year, NVSRAM 56B HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 4.5V ~ 5.5V 2.5V ~ 3.5V 100µA (Typ) @ 4.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SOH
RTC-72423B0:PURE SN

RTC-72423B0:PURE SN

IC RTC CLK/CALENDAR PAR 24SOP

EPSON

0 -
RFQ
RTC-72423B0:PURE SN

Datasheet

RTC-72423 24-SOIC (0.311", 7.90mm Width) Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Leap Year - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 4.5V ~ 5.5V - 5µA ~ 10µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 24-SOP
KR3225Y32768EAW30TAA

KR3225Y32768EAW30TAA

IC RTC CLOCK/CALENDAR I2C SMD

KYOCERA AVX

0 -
RFQ
KR3225Y32768EAW30TAA

Datasheet

- 8-SMD Tape & Reel (TR) Obsolete Not Verified Clock/Calendar Alarm - HH:MM:SS YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 2µA @ 3V -40°C ~ 85°C Surface Mount - - SMD
BQ4802LYPWG4

BQ4802LYPWG4

IC RTC CLK/CALENDAR PAR 28TSSOP

Texas Instruments

0 -
RFQ
BQ4802LYPWG4

Datasheet

- 28-TSSOP (0.173", 4.40mm Width) Tube Discontinued at Digi-Key Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd Parallel 2.7V ~ 3.6V 2.4V ~ 4V 1.5mA (Typ) @ 2.7 V ~ 3.6 V 0°C ~ 70°C Surface Mount - - 28-TSSOP
DS1344D-3+

DS1344D-3+

IC RTC CLK/CALENDAR SPI 14TDFN

Analog Devices Inc./Maxim Integrated

0 -
RFQ
DS1344D-3+

Datasheet

- 14-WFDFN Exposed Pad Tube Active Not Verified Clock/Calendar Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger 96B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI 2.7V ~ 5.5V 1.3V ~ 5.5V - -40°C ~ 85°C Surface Mount - - 14-TDFN (3x3)
ISL12022MIBZR5421

ISL12022MIBZR5421

IC RTC CLK/CALENDAR I2C 20SOIC

Renesas Electronics Corporation

0 -
RFQ
ISL12022MIBZR5421

Datasheet

- 20-SOIC (0.295", 7.50mm Width) Tube Active Not Verified Clock/Calendar Alarm, Daylight Savings, Leap Year, SRAM 128B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 1.8V ~ 5.5V 14µA ~ 15µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 20-SOIC
RA-4574SA:B3 ROHS

RA-4574SA:B3 ROHS

IC RTC CLK/CALENDAR SER 14SOP

EPSON

0 -
RFQ
RA-4574SA:B3 ROHS

Datasheet

- 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 Automotive AEC-Q200 14-SOP
RTC-4701JE:B3 ROHS

RTC-4701JE:B3 ROHS

IC RTC CLK/CALENDAR SER 20VSOJ

EPSON

0 -
RFQ
RTC-4701JE:B3 ROHS

Datasheet

- 20-LSSOJ (0.213", 5.40mm 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 - - -40°C ~ 85°C Surface Mount - - 20-VSOJ
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