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
MCP7940N-I/SN

MCP7940N-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

6,571 -
RFQ
MCP7940N-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount Automotive AEC-Q100 8-SOIC
MCP7940MT-I/MNY

MCP7940MT-I/MNY

IC RTC CLK/CALENDAR I2C 8TDFN

Microchip Technology

14,983 -
RFQ
MCP7940MT-I/MNY

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V - 1µA @ 5.5V -40°C ~ 85°C Surface Mount - - 8-TDFN (2x3)
PCF85063ATL/1,118

PCF85063ATL/1,118

IC RTC CLK/CALENDAR I2C 10DFN

NXP USA Inc.

29,340 -
RFQ
PCF85063ATL/1,118

Datasheet

- 10-XFDFN Exposed Pad 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 0.9V ~ 5.5V - 0.6µA @ 3.3V -40°C ~ 85°C Surface Mount - - 10-DFN (2.6x2.6)
MCP7940NT-I/SN

MCP7940NT-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

5,077 -
RFQ
MCP7940NT-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount Automotive AEC-Q100 8-SOIC
MCP7940NT-I/MS

MCP7940NT-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

25,768 -
RFQ
MCP7940NT-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount Automotive AEC-Q100 8-MSOP
MCP7940N-I/MS

MCP7940N-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

2,636 -
RFQ
MCP7940N-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount Automotive AEC-Q100 8-MSOP
PCF85063AT/AY

PCF85063AT/AY

IC RTC CLOCK/CALENDAR I2C 8SO

NXP USA Inc.

68,313 -
RFQ
PCF85063AT/AY

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 0.9V ~ 5.5V - 0.6µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-SO
PCF85063TP/1Z

PCF85063TP/1Z

IC RTC CLK/CALENDAR I2C 8HWSON

NXP USA Inc.

20,477

1+:$0.920000

10+:$0.659000

25+:$0.593600

100+:$0.521600

250+:$0.487320

500+:$0.466620

1000+:$0.449580

PCF85063TP/1Z

Datasheet

- 8-WFDFN Exposed Pad 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 0.9V ~ 5.5V - 0.6µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-HWSON (2x3)
PCF85063ATT/AJ

PCF85063ATT/AJ

IC RTC CLK/CALENDAR I2C 8TSSOP

NXP USA Inc.

35,531 -
RFQ
PCF85063ATT/AJ

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 0.9V ~ 5.5V - 0.6µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-TSSOP
MCP7940NT-E/SN

MCP7940NT-E/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

2,460

1+:$0.920000

25+:$0.850000

100+:$0.812500

MCP7940NT-E/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 125°C Surface Mount Automotive AEC-Q100 8-SOIC
MCP7940NT-I/MNY

MCP7940NT-I/MNY

IC RTC CLK/CALENDAR I2C 8TDFN

Microchip Technology

41,843 -
RFQ
MCP7940NT-I/MNY

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount Automotive AEC-Q100 8-TDFN (2x3)
MCP79400T-I/SN

MCP79400T-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

3,805

1+:$0.950000

25+:$0.880000

100+:$0.830000

MCP79400T-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA (Typ) @ 3.3V -40°C ~ 85°C Surface Mount - - 8-SOIC
PCF8563T/5,518

PCF8563T/5,518

IC RTC CLOCK/CALENDAR I2C 8SO

NXP USA Inc.

9,748 -
RFQ
PCF8563T/5,518

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS (24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1V ~ 5.5V - 0.6µA ~ 0.75µA @ 2V ~ 5V -40°C ~ 85°C Surface Mount - - 8-SO
MCP79410T-I/SN

MCP79410T-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

4,196 -
RFQ
MCP79410T-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-SOIC
MCP79410-I/SN

MCP79410-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

2,381 -
RFQ
MCP79410-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-SOIC
MCP79410T-I/MS

MCP79410T-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

12,200 -
RFQ
MCP79410T-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-MSOP
MCP79410-I/MS

MCP79410-I/MS

IC RTC CLK/CALENDAR I2C 8MSOP

Microchip Technology

4,430 -
RFQ
MCP79410-I/MS

Datasheet

- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-MSOP
PCF85263ATL/AX

PCF85263ATL/AX

IC RTC CLK/CALENDAR I2C 10DFN

NXP USA Inc.

9,148 -
RFQ
PCF85263ATL/AX

Datasheet

- 10-XFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Watchdog Timer - HH:MM:SS:hh (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 0.9V ~ 5.5V 0.9V ~ 5.5V 0.885µA @ 3.3V -40°C ~ 85°C Surface Mount - - 10-DFN (2.6x2.6)
MCP79410T-I/MNY

MCP79410T-I/MNY

IC RTC CLK/CALENDAR I2C 8TDFN

Microchip Technology

23,275 -
RFQ
MCP79410T-I/MNY

Datasheet

- 8-WFDFN Exposed Pad Tape & Reel (TR) Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-TDFN (2x3)
MCP79411-I/SN

MCP79411-I/SN

IC RTC CLK/CALENDAR I2C 8SOIC

Microchip Technology

3,595 -
RFQ
MCP79411-I/SN

Datasheet

- 8-SOIC (0.154", 3.90mm Width) Tube Active Not Verified Clock/Calendar Alarm, Leap Year, Square Wave Output, SRAM, Unique ID 64B, 1Kb HH:MM:SS (12/24 hr) YY-MM-DD-dd I2C, 2-Wire Serial 1.8V ~ 5.5V 1.3V ~ 5.5V 1.2µA @ 3.3V -40°C ~ 85°C Surface Mount - - 8-SOIC
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