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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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MCP795B21-I/STIC RTC CLK/CALENDAR SPI 14TSSOP |
0 | - |
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Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-TSSOP |
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MCP795B22-I/STIC RTC CLK/CALENDAR SPI 14TSSOP |
0 | - |
|
Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-TSSOP |
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PT7C4363BQ1WEXIC RTC CLK/CALENDAR I2C 8SOIC |
0 | - |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C, SMBus | 1.3V ~ 5.5V | 3V | 1.5µA @ 5V | -40°C ~ 125°C | Surface Mount | Automotive | AEC-Q100 | 8-SOIC |
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MCP795B21-I/SLIC RTC CLK/CALENDAR SPI 14SOIC |
0 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
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MCP795B22-I/SLIC RTC CLK/CALENDAR SPI 14SOIC |
0 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
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RX-8035SAB0 PURE SNIC RTC TIME EVENT REC I2C 14SOP |
0 | - |
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Datasheet |
RX-8035SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Active | Not Verified | Time Event Recorder | Alarm | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.4V ~ 5.5V | 1V ~ 5.5V | 2.5µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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BU9873FJ-GTE2IC RTC CLOCK/CALENDAR I2C 8SOP |
0 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Not For New Designs | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 1µA ~ 1.35µA @ 3V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOP-J |
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DS1302ZNIC RTC CLK/CALENDAR SER 8SOIC |
0 | - |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | 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 |
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MCP795W12-I/STIC RTC CLK/CALENDAR SPI 14TSSOP |
7 | - |
|
Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-TSSOP |
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RX-4571LCB0 PURE SNRX-4571LC:B0 RTC {SN-AG OR SN} V |
0 | - |
|
Datasheet |
RX-4571LC | 12-TFSOJ (0.094", 2.40mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS | YY-MM-DD | 3-Wire Serial | 1.6V ~ 5.5V | 1V ~ 5.5V | 0.95µA ~ 1µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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RV-8803-C7-TA-QCIC RTC CLK/CALENDAR I2C 8SON |
0 | - |
|
- |
- | 8-WCDFN | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, RAM | - | HH:MM:SS | YY-MM-DD-dd | I2C | 1.5V ~ 5.5V | - | 0.35µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-SON (3.2x1.5) |
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M41T11M6EIC RTC CLK/CALENDAR I2C 8SOIC |
0 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | 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 | - | - | 8-SOIC |
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ISL1208IU8-TKIC RTC CLK/CALENDAR I2C 8MSOP |
0 | - |
|
Datasheet |
- | 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP |
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V3021DL8A+LINEAR IC |
0 | - |
|
- |
- | 8-DIP (0.300", 7.62mm) | Tube | Active | - | Clock/Calendar | Leap Year, RAM | 1B | HH:MM:SS | YY-MM-DD-dd | 3-Wire Serial | 2V ~ 5.5V | - | 1.8µA @ 5V | -40°C ~ 85°C (TA) | Through Hole | - | - | 8-DIP |
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MAX31329NELB+TINTEGRATED RC17 W/ NDK CRYSTAL |
0 | - |
|
Datasheet |
- | 10-LLGA | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 0.5µA ~ 0.7µA @ 1.6V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 10-LGA (5x5) |
|
RTC-4574SA:B0 ROHSIC RTC CLK/CALENDAR SER 14SOP |
0 | - |
|
Datasheet |
RTC-4574SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.6V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
DS2415P+IC RTC BINARY CNTR 1-WIRE 6TSOC |
0 | - |
|
Datasheet |
- | 6-SMD, J-Lead | Tube | Obsolete | Not Verified | Binary Counter | Unique ID | - | Binary | Binary | 1-Wire® Serial | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 0.25µA ~ 0.45µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 6-TSOC |
|
RTC-4543SA:A0 ROHSIC RTC CLK/CALENDAR SER 14SOP |
0 | - |
|
Datasheet |
RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
RX-8581SA:B0IC RTC CLK/CALENDAR I2C 14SOP |
0 | - |
|
Datasheet |
RX-8581SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
RX8130CE:BBIC RTC TIME EVENT REC I2C 10SMD |
0 | - |
|
Datasheet |
RX8130CE | 10-SMD, No Lead | Bulk | Active | Not Verified | Time Event Recorder | Alarm | - | - | - | I2C | 1.25V ~ 5.5V | - | 0.5µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 10-SMD |

