Real Time Clocks
Explore Real Time Clocks parts from multiple manufacturers, with model information, availability, datasheets and technical specifications for engineering and purchasing.
For parts that are not shown in the list, send the manufacturer part number, quantity or BOM to JIEXIN Electronics. Our team can assist with availability checks and quotation support.
| Photo | Mfr. Part # | Availability | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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MCP7940N-I/PIC RTC CLOCK/CALENDAR I2C 8DIP |
1,813 |
|
Datasheet | - | 8-DIP (0.300", 7.62mm) | 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 | Through Hole | Automotive | AEC-Q100 | 8-PDIP |
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MCP79400-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
4,241 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 |
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MCP7940NT-E/MSIC RTC CLK/CALENDAR I2C 8MSOP |
7,012 |
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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 ~ 125°C | Surface Mount | Automotive | AEC-Q100 | 8-MSOP |
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MCP79400T-I/MSIC RTC CLK/CALENDAR I2C 8MSOP |
5,673 |
|
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 | 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-MSOP |
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MCP79402-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
878 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 |
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MCP79401-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
395 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 |
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MCP79410-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
7,634 |
|
Datasheet | - | 8-TSSOP (0.173", 4.40mm 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-TSSOP |
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MCP79410T-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
5,235 |
|
Datasheet | - | 8-TSSOP (0.173", 4.40mm 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-TSSOP |
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S-35390A-I8T1UIC RTC CLK/CALENDAR I2C SNT8A |
14,154 |
|
Datasheet | - | 8-SMD, Flat Leads | 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 | 1.3V ~ 5.5V | - | 0.93µA ~ 1.1µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | SNT-8A |
|
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MCP79411T-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
25,535 |
|
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 |
|
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MCP79412-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
11,815 |
|
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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MCP79412T-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
1,044 |
|
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 |
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BQ32002DRIC RTC CLK/CALENDAR I2C 8SOIC |
7,070 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Leap Year, Square Wave Output | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 3V ~ 3.6V | 1.4V ~ 3.6V | 65µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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MCP79412-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
410 |
|
Datasheet | - | 8-TSSOP (0.173", 4.40mm 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-TSSOP |
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PCF85263ATT1/AZIC RTC CLK/CALENDAR I2C 10TSSOP |
6,286 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 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 | 0.9V ~ 1.8V, 0.9V ~ 5.5V | 0.9V ~ 5.5V | 0.885µA @ 3.3V | -40°C ~ 85°C (TA) | Surface Mount | Automotive | AEC-Q100 | 10-TSSOP |
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MCP79412T-I/MNYIC RTC CLK/CALENDAR I2C 8TDFN |
4,200 |
|
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) |
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PCF8563BS/4,118IC RTC CLK/CALENDAR I2C 10HVSON |
17,656 |
|
Datasheet | - | 10-VFDFN Exposed Pad | 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 | - | - | 10-HVSON (3x3) |
|
MCP79511-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
2,294 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 10-MSOP |
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MCP79520T-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
1,488 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 10-MSOP |
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MCP79511T-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
1,461 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 10-MSOP |
Frequently Asked Questions
What are Real Time Clocks components used for?
Real Time Clocks components are used in a wide range of electronic equipment and systems. Their exact function depends on the device, circuit design and technical requirements of the application.
How do I choose the right Real Time Clocks part?
Compare the manufacturer part number, key specifications, package type, operating conditions, availability and datasheet information. For replacement projects, always verify the critical electrical and mechanical parameters before selecting an alternative.
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