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0755-82798135Real Time Clocks
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 |
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MCP79511T-I/MNIC RTC CLK/CALENDAR SPI 10TDFN |
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- | 10-WFDFN Exposed Pad | 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-TDFN (3x3) |
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MCP79512T-I/MNIC RTC CLK/CALENDAR SPI 10TDFN |
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- | 10-WFDFN Exposed Pad | 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-TDFN (3x3) |
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MCP79512T-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
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- | 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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MCP79520T-I/MNIC RTC CLK/CALENDAR SPI 10TDFN |
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- | 10-WFDFN Exposed Pad | 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-TDFN (3x3) |
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M41T0DS6FIC RTC CLK/CALENDAR I2C 8-TSSOP |
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Datasheet |
- | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | - | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 2V ~ 5.5V | - | 1.2µA ~ 31µA @ 3V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | - |
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EM3027IDSSO8A+LINEAR IC |
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- | 8-SOIC (0.154", 3.90mm Width) | Tube | Last Time Buy | - | Clock/Calendar | Alarm, EEPROM, Leap Year, RAM, Trickle-Charger | 8B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 1.4V ~ 5.5V | 1.4V ~ 5.5V | 4.6µA ~ 5.5µA @ 1.4V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-SOIC |
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DS1337SIC RTC CLK/CALENDAR I2C 8SOIC |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | 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 |
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M41T0DS6EIC RTC CLOCK/CALENDAR I2C |
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Datasheet |
- | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | - | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 2V ~ 5.5V | - | 1.2µA ~ 31µA @ 3V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | - |
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ISL1208IB8Z-TKR5291IC RTC CLK/CALENDAR I2C 8SOIC |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | 2B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 4µA ~ 6µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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DS2417PIC RTC BINARY CNTR 1-WIRE 6TSOC |
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Datasheet |
- | 6-SMD, J-Lead | Tube | Obsolete | 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 |
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MCP79521T-I/MNIC RTC CLK/CALENDAR SPI 10TDFN |
0 | - |
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- | 10-WFDFN Exposed Pad | 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-TDFN (3x3) |
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MCP79522T-I/MNIC RTC CLK/CALENDAR SPI 10TDFN |
0 | - |
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- | 10-WFDFN Exposed Pad | 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-TDFN (3x3) |
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MCP79522T-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
0 | - |
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- | 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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DS2415P/T&RIC RTC REAL TIME CLK 1WIRE 6TSOC |
0 | - |
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Datasheet |
- | 6-SMD, J-Lead | Tape & Reel (TR) | Obsolete | Not Verified | Real Time Clock (RTC) | - | - | Binary | Binary | 1-Wire® Serial | 3V, 3.3V, 5V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 6-TSOC |
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PCF8583T/5,512IC RTC CLOCK/CALENDAR I2C 8SO |
0 | - |
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Datasheet |
- | 8-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output | 240B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD | I2C, 2-Wire Serial | 2.5V ~ 6V | - | 10µA ~ 50µA @ 1V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SO |
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DS1672S-3/T&RIC RTC BINARY COUNTER I2C 8SOIC |
0 | - |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Binary Counter | Trickle-Charger | - | Binary | Binary | I2C, 2-Wire Serial | 2.7V ~ 3.3V | 1.3V ~ 3.63V | 500µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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RV-4162-C7-32.768KHZ-20PPM-TA-QAIC RTC CLK/CALENDAR I2C 8SON |
0 | - |
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Datasheet |
C7 | 8-WCDFN | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Programmable Clock Output, Watchdog Timer | - | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1V ~ 4.4V | - | 0.5µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | Automotive | AEC-Q200 | 8-SON (3.2x1.5) |
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MAX31331TETB+TULTRA-LOW POWER 12C REAL TIME CL |
0 | - |
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Datasheet |
- | 10-WFDFN Exposed Pad | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger | 32B | HH:MM:SS (12/24 hr) | YY-MM-DD | I2C | 1.1V ~ 5.5V | 1.1V ~ 5.5V | 0.65µA ~ 0.7µA @ 1.1V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-TDFN (3x3) |
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1337AGDVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
0 | - |
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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 | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.3µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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RV-4162-C7-32.768KHZ-10PPM-TA-QCIC RTC CLK/CALENDAR I2C 8SON |
0 | - |
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Datasheet |
C7 | 8-WCDFN | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Programmable Clock Output, Watchdog Timer | - | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1V ~ 4.4V | - | 0.5µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-SON (3.2x1.5) |

