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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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MAX6917EO30+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
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- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.3V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 20-QSOP |
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MAX6917EO50+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
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- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 20-QSOP |
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MAX6909EO30+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
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Datasheet |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.3V | - | - | - | Surface Mount | - | - | 20-QSOP |
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MAX6909EO33+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
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Datasheet |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 3V ~ 3.6V | - | - | - | Surface Mount | - | - | 20-QSOP |
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ISL12022MIBZ-T7AIC RTC CLK/CALENDAR I2C 20SOIC |
0 | - |
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- |
- | 20-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, SRAM | 128B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 14µA ~ 15µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-SOIC |
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M41ST85WMH6TRIC RTC CLK/CALENDAR I2C 28SOH |
0 | - |
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Datasheet |
- | 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output, Supervisor, Watchdog Timer | 44B | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.6V | 2.5V ~ 3.5V | 0.5mA @ 2.7V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 28-SOH |
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DS1689SIC RTC CLK/CALENDAR PAR 28SOIC |
0 | - |
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Datasheet |
- | 28-SOIC (0.337", 8.56mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | NVSRAM | 114B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.3V, 4.5V ~ 5.5V | 2.5V ~ 3.7V | 2mA @ 3V, 3mA @ 5V | 0°C ~ 70°C | Surface Mount | - | - | 28-SOIC |
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DS1501YIC RTC CLK/CALENDAR PAR 28DIP |
0 | - |
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Datasheet |
- | 28-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K | 256B | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 5mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 28-PDIP |
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DS1501WIC RTC CLK/CALENDAR PAR 28DIP |
0 | - |
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Datasheet |
- | 28-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K | 256B | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 4mA @ 3V ~ 3.6V | 0°C ~ 70°C | Through Hole | - | - | 28-PDIP |
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MAX6910EO33+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
|
Datasheet |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 3V ~ 3.6V | - | - | - | Surface Mount | - | - | 20-QSOP |
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MAX6910EO30+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
|
Datasheet |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.3V | - | - | - | Surface Mount | - | - | 20-QSOP |
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M48T86PC1IC RTC CLK/CALENDAR PAR 24-DIP |
0 | - |
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Datasheet |
- | 24-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output | 114B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 15mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 24-PCDIP, CAPHAT® |
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M41T56MH6FIC RTC CLK/CALENDAR I2C 28SOH |
0 | - |
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Datasheet |
- | 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 56B | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | 2.5V ~ 3.5V | 100µA (Typ) @ 4.5V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 28-SOH |
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RTC-72423B0:PURE SNIC RTC CLK/CALENDAR PAR 24SOP |
0 | - |
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Datasheet |
RTC-72423 | 24-SOIC (0.311", 7.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 5µA ~ 10µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 24-SOP |
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KR3225Y32768EAW30TAAIC RTC CLOCK/CALENDAR I2C SMD |
0 | - |
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Datasheet |
- | 8-SMD | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V | - | 2µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | SMD |
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BQ4802LYPWG4IC RTC CLK/CALENDAR PAR 28TSSOP |
0 | - |
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Datasheet |
- | 28-TSSOP (0.173", 4.40mm Width) | Tube | Discontinued at Digi-Key | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.6V | 2.4V ~ 4V | 1.5mA (Typ) @ 2.7 V ~ 3.6 V | 0°C ~ 70°C | Surface Mount | - | - | 28-TSSOP |
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DS1344D-3+IC RTC CLK/CALENDAR SPI 14TDFN |
0 | - |
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Datasheet |
- | 14-WFDFN Exposed Pad | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 2.7V ~ 5.5V | 1.3V ~ 5.5V | - | -40°C ~ 85°C | Surface Mount | - | - | 14-TDFN (3x3) |
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ISL12022MIBZR5421IC RTC CLK/CALENDAR I2C 20SOIC |
0 | - |
|
Datasheet |
- | 20-SOIC (0.295", 7.50mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, SRAM | 128B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 14µA ~ 15µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-SOIC |
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RA-4574SA:B3 ROHSIC RTC CLK/CALENDAR SER 14SOP |
0 | - |
|
Datasheet |
- | 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 | Automotive | AEC-Q200 | 14-SOP |
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RTC-4701JE:B3 ROHSIC RTC CLK/CALENDAR SER 20VSOJ |
0 | - |
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Datasheet |
- | 20-LSSOJ (0.213", 5.40mm 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 | - | - | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ |

