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
DS1337U+T&R

DS1337U+T&R

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

5,464 -
RFQ
DS1337U+T&R

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.6µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1341U+T&R

DS1341U+T&R

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

2,438 -
RFQ
DS1341U+T&R

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.5µA ~ 0.6µA @ 3V ~ 5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS2417P+T&R

DS2417P+T&R

IC RTC BINARY CNTR 1-WIRE 6TSOC

Analog Devices Inc./Maxim Integrated

10,310 -
RFQ
DS2417P+T&R

Datasheet

- 6-SMD, J-Lead Tape & Reel (TR) Active Not Verified Binary Counter Unique ID - Binary Binary 1-Wire® Serial 2.5V ~ 5.5V - 0.45µA @ 2.5V ~ 5.5V -40°C ~ 85°C Surface Mount - - 6-TSOC
M41T83RMY6F

M41T83RMY6F

IC RTC CLK/CALENDAR I2C 18SOX

STMicroelectronics

9,375 -
RFQ
M41T83RMY6F

Datasheet

- 18-SOX, 18-SOIC with Crystal (7.5mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer 7B HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 2.7V ~ 5.5V 2V ~ 5.5V 10µA @ 5.5V -40°C ~ 85°C Surface Mount - - 18-SOX
ISL12026IBZ-T

ISL12026IBZ-T

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

4,713 -
RFQ
ISL12026IBZ-T

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
ISL12026IBZ

ISL12026IBZ

IC RTC CLK/CALENDAR I2C 8SOIC

Renesas Electronics Corporation

3,970 -
RFQ
ISL12026IBZ

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active 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 ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-SOIC
PCF2129AT/2,518

PCF2129AT/2,518

IC RTC CLOCK/CALENDAR I2C 20SO

NXP USA Inc.

770 -
RFQ
PCF2129AT/2,518

Datasheet

- 20-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 4.2V 1.8V ~ 4.2V 1.5µA @ 3.3V -40°C ~ 85°C Surface Mount - - 20-SO
RV-3032-C7-32.768KHZ-2.5PPM-TA-QC

RV-3032-C7-32.768KHZ-2.5PPM-TA-QC

IC RTC TEMPERAT CLK/CAL I2C 8SON

Micro Crystal AG

10,158 -
RFQ
RV-3032-C7-32.768KHZ-2.5PPM-TA-QC

Datasheet

C7 8-WCDFN Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Battery Switch, Clock Output Hz-MHz, Event Input, Temperature Alarm, Timer, Trickle Charge with Charge Pump 16B, 32B HH:MM:SS:100th (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 210nA @ 3V -40°C ~ 105°C (TA) Surface Mount - - 8-SON (3.2x1.5)
DS1337S+T&R

DS1337S+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

7,704 -
RFQ
DS1337S+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.6µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-SOIC
RV-3149-C3-32.768KHZ-OPTION-B-TB-QA

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

IC RTC CLK/CALENDAR SPI 10SON

Micro Crystal AG

17,872 -
RFQ
RV-3149-C3-32.768KHZ-OPTION-B-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)
RV-3032-C7-32.768KHZ-2.5PPM-TA-QA

RV-3032-C7-32.768KHZ-2.5PPM-TA-QA

IC RTC TEMPERAT CLK/CAL I2C 8SON

Micro Crystal AG

6,083 -
RFQ
RV-3032-C7-32.768KHZ-2.5PPM-TA-QA

Datasheet

C7 8-WCDFN Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Battery Switch, Clock Output Hz-MHz, Event Input, Temperature Alarm, Timer, Trickle Charge with Charge Pump 16B, 32B HH:MM:SS:100th (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.3V ~ 5.5V - 210nA @ 3V -40°C ~ 105°C (TA) Surface Mount Automotive AEC-Q200 8-SON (3.2x1.5)
AB-RTCMC-32.768KHZ-AIGZ-S7-T

AB-RTCMC-32.768KHZ-AIGZ-S7-T

IC RTC CLK/CALENDAR I2C 8CLCC

Abracon LLC

1,615 -
RFQ
AB-RTCMC-32.768KHZ-AIGZ-S7-T

Datasheet

- 8-WCDFN Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS:hh (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 4.4V - 0.4µA ~ 0.95µA @ 1V ~ 4.4V -40°C ~ 85°C Surface Mount - - 8-CLCC (3.2x1.5)
RV-8564-C2-32.768KHZ-20PPM-TA-QC

RV-8564-C2-32.768KHZ-20PPM-TA-QC

IC RTC CLK/CALENDAR I2C 10SON

Micro Crystal AG

2,282 -
RFQ
RV-8564-C2-32.768KHZ-20PPM-TA-QC

Datasheet

C2 10-TDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Programmable Clock Output, Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.35µA @ 3V -40°C ~ 85°C (TA) Surface Mount - - 10-SON (5x3.2)
DS1337U+

DS1337U+

IC RTC CLOCK/CALENDAR I2C 8UMAX

Analog Devices Inc./Maxim Integrated

495 -
RFQ
DS1337U+

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 0.6µA @ 1.3V ~ 1.8V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1307Z+T&R

DS1307Z+T&R

IC RTC CLK/CALENDAR I2C 8SOIC

Analog Devices Inc./Maxim Integrated

9,812 -
RFQ
DS1307Z+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 0°C ~ 70°C Surface Mount - - 8-SOIC
PCF2129T/2,518

PCF2129T/2,518

IC RTC CLOCK/CALENDAR I2C 16SO

NXP USA Inc.

3,571 -
RFQ
PCF2129T/2,518

Datasheet

- 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer - HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 4.2V 1.8V ~ 4.2V 1.5µA @ 3.3V -40°C ~ 85°C Surface Mount - - 16-SO
DS1371U+T&R

DS1371U+T&R

IC RTC BINARY COUNTER I2C 8UMAX

Analog Devices Inc./Maxim Integrated

8,356 -
RFQ
DS1371U+T&R

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Binary Counter Alarm, Square Wave Output, Watchdog Timer - Binary Binary I2C, 2-Wire Serial 1.7V ~ 5.5V - 1.3µA @ 1.7V ~ 5.5V -40°C ~ 85°C Surface Mount - - 8-uMAX/uSOP
DS1672S-33+T&R

DS1672S-33+T&R

IC RTC BINARY COUNTER I2C 8SOIC

Analog Devices Inc./Maxim Integrated

3,823 -
RFQ
DS1672S-33+T&R

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Binary Counter Trickle-Charger - Binary Binary I2C, 2-Wire Serial 2.97V ~ 3.63V 1.3V ~ 3.63V 500µA @ 3.63V -40°C ~ 85°C Surface Mount - - 8-SOIC
DS1302Z+T&R

DS1302Z+T&R

IC RTC CLK/CALENDAR SER 8SOIC

Analog Devices Inc./Maxim Integrated

1,412 -
RFQ
DS1302Z+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 0°C ~ 70°C Surface Mount - - 8-SOIC
RV-3129-C3-32.768KHZ-OPTION-A-TB-QA

RV-3129-C3-32.768KHZ-OPTION-A-TB-QA

IC RTC CLK/CALENDAR I2C 10SON

Micro Crystal AG

7,761 -
RFQ
RV-3129-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 I2C, 2-Wire Serial 1.3V ~ 5.5V - 1µA @ 3V -40°C ~ 125°C (TA) Surface Mount Automotive AEC-Q200 10-SON (3.7x2.5)
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