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
M41T11MH6F

M41T11MH6F

IC RTC CLK/CALENDAR I2C 28SOH

STMicroelectronics

4,125 -
RFQ
M41T11MH6F

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Active Not Verified Clock/Calendar Leap Year, NVSRAM 56B HH:MM:SS YY-MM-DD-dd I2C, 2-Wire Serial 2V ~ 5.5V 2.5V ~ 3.5V 70µA @ 2V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SOH
RV-3149-C3-32.768KHZ-OPTION-A-TB-QA

RV-3149-C3-32.768KHZ-OPTION-A-TB-QA

IC RTC CLK/CALENDAR SPI 10SON

Micro Crystal AG

6,100 -
RFQ
RV-3149-C3-32.768KHZ-OPTION-A-TB-QA

Datasheet

C3 10-VCDFN Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, EEPROM, Leap Year, Programmable Clock Output, RAM, Temperature, Timer, Trickle Charger 2B, 8B HH:MM:SS (12/24 hr) YY-MM-DD-dd SPI, 4-Wire Serial 1.3V ~ 5.5V - 1µA @ 3V -40°C ~ 125°C (TA) Surface Mount Automotive AEC-Q200 10-SON (3.7x2.5)
DS1308U-18+T

DS1308U-18+T

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

3,751 -
RFQ
DS1308U-18+T

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active 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 1.71V ~ 5.5V 1.3V ~ 5.5V 100µA @ 200µA @ 1.89V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1307ZN+T&R

DS1307ZN+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

6,985 -
RFQ
DS1307ZN+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active 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
DS1302ZN+T&R

DS1302ZN+T&R

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

6,285 -
RFQ
DS1302ZN+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active 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
ISL12022IBZ

ISL12022IBZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

5,814 -
RFQ
ISL12022IBZ

Datasheet

- 8-SOIC (0.154", 3.90mm 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 - - 8-SOIC
DS1339AU+T

DS1339AU+T

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

11,596 -
RFQ
DS1339AU+T

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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 1.71V ~ 5.5V 1.3V ~ 3.7V 200µA @ 1.71V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1390U-33+T&R

DS1390U-33+T&R

IC RTC CLK/CALENDAR SPI 10UMAX

Analog Devices Inc./Maxim Integrated

10,917 -
RFQ
DS1390U-33+T&R

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
DS1338Z-33+T&R

DS1338Z-33+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

3,028 -
RFQ
DS1338Z-33+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active 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 3V ~ 5.5V 1.3V ~ 3.7V 125µA ~ 200µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1302SN+T&R

DS1302SN+T&R

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

2,528 -
RFQ
DS1302SN+T&R

Datasheet

- 8-SOIC (0.209", 5.30mm Width) Tape & Reel (TR) Active 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
MAX31343EKA+T

MAX31343EKA+T

IC RTC CLK/CALENDAR I2C 8WLP

Analog Devices Inc./Maxim Integrated

2,542 -
RFQ
MAX31343EKA+T

Datasheet

- 8-VFBGA, WLBGA Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, RAM, Square Wave Output, SRAM, Trickle Charger 64B HH:MM:SS (24 hr) YY-MM-DD-dd I2C 1.6V ~ 5.5V 1.6V ~ 5.5V 1.2µA ~ 2µA @ 1.6V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-WLP (2.07x2.27)
DS1340U-33+T&R

DS1340U-33+T&R

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

13,008 -
RFQ
DS1340U-33+T&R

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Leap Year, Trickle-Charger - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 150µA @ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
M41T94MH6F

M41T94MH6F

IC RTC CLK/CALENDAR SPI 28SOH

STMicroelectronics

8,289 -
RFQ
M41T94MH6F

Datasheet

- 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, NVRAM, Square Wave Output, Watchdog Timer 44B HH:MM:SS:hh (24 hr) YY-MM-DD-dd SPI 2.7V ~ 5.5V 2.5V ~ 3.5V 1.4mA @ 2.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 28-SOH
DS1307Z+

DS1307Z+

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

3,101 -
RFQ
DS1307Z+

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active 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 Surface Mount - - 8-SOIC
DS1391U-33+T&R

DS1391U-33+T&R

IC RTC CLK/CALENDAR SPI 10UMAX

Analog Devices Inc./Maxim Integrated

9,866 -
RFQ
DS1391U-33+T&R

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
DS1374U-33+T&R

DS1374U-33+T&R

IC RTC BINARY COUNTER I2C 10UMAX

Analog Devices Inc./Maxim Integrated

5,592 -
RFQ
DS1374U-33+T&R

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Binary Counter Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 175µA @ 2.97V ~ 5.5V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
DS1390U-3+T&R

DS1390U-3+T&R

IC RTC CLK/CALENDAR SPI 10UMAX

Analog Devices Inc./Maxim Integrated

5,306 -
RFQ
DS1390U-3+T&R

Datasheet

- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, Trickle-Charger - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd SPI 2.7V ~ 3.3V 1.3V ~ 3.7V 125µA @ 2.7V ~ 3.3V -40°C ~ 85°C Surface Mount - - 10-uMAX/uSOP
DS1340Z-33+T&R

DS1340Z-33+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

4,549 -
RFQ
DS1340Z-33+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Leap Year, Trickle-Charger - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.97V ~ 5.5V 1.3V ~ 5.5V 150µA @ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1338U-33+T&R

DS1338U-33+T&R

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

3,584 -
RFQ
DS1338U-33+T&R

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active 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 3V ~ 5.5V 1.3V ~ 3.7V 125µA ~ 200µA @ 3.63V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
AB-RTCMC-32.768KHZ-IBO5-S3-T

AB-RTCMC-32.768KHZ-IBO5-S3-T

IC RTC CLK/CALENDAR I2C MODULE

Abracon LLC

11,442 -
RFQ
AB-RTCMC-32.768KHZ-IBO5-S3-T

Datasheet

- Module Tape & Reel (TR) Not For New Designs Not Verified Clock/Calendar Alarm, Square Wave Output, SRAM, Trickle Charge, Watchdog Timer 512B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.5V ~ 3.6V 1.4V ~ 3.6V 0.29µA ~ 0.33µA @ 1.8V ~ 3V -40°C ~ 85°C Surface Mount - - Module
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