Available 24/7 at
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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DS2404S-001IC RTC BINARY CTR 1-WIRE 16SOIC |
0 | - |
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Datasheet |
EconoRAM | 16-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Binary Counter | Alarm, Square Wave Output, SRAM | 512B | Binary | Binary | 1-Wire® and 3-Wire | 2.8V ~ 5.5V | 2.8V ~ 5.5V | 500µA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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M41T56C64MY6FIC RTC CLK/CALENDAR I2C 18SOX |
0 | - |
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Datasheet |
- | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | EEPROM, Leap Year, NVSRAM | 56B, 8KB | HH:MM:SS | 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 | - | - | 18-SOX |
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BQ4802LYDSHIC RTC CLK/CALENDAR PAR 28SOP |
0 | - |
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Datasheet |
- | 28-SOIC (0.345", 8.77mm Width) with SNAPHAT Sockets | Tube | Obsolete | 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-SOP |
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RTC-4701NB:B3 ROHSIC RTC CLK/CALENDAR SER 22SON |
0 | - |
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Datasheet |
- | 22-LFDFN | 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 | - | - | 22-SON (6.3x4.8) |
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RX-4574LC:B3 PURE SNIC RTC CLK/CALENDAR SER 12VSOJ |
0 | - |
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Datasheet |
RX-4581NB | 12-TFSOJ (0.094", 2.40mm 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 | - | 0.7µA ~ 0.9µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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DS1685S-3+T&RIC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
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Datasheet |
- | 24-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 3V | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
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DS1685E-5+T&RIC RTC CLK/CALENDAR PAR 24TSSOP |
0 | - |
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Datasheet |
- | 24-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 5V | 0°C ~ 70°C | Surface Mount | - | - | 24-TSSOP |
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DS1685E-3+T&RIC RTC CLK/CALENDAR PAR 24TSSOP |
0 | - |
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Datasheet |
- | 24-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 3V | 0°C ~ 70°C | Surface Mount | - | - | 24-TSSOP |
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RA-4565SA:B3 ROHSIC RTC CLK/CALENDAR SER 14SOP |
0 | - |
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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 | 4-Wire Serial | 1.6V ~ 5.5V | - | 1.6µA ~ 2µA @ 3V ~ 5V | -40°C ~ 125°C | Surface Mount | Automotive | AEC-Q200 | 14-SOP |
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DS1501WNIC 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 | -40°C ~ 85°C | Through Hole | - | - | 28-PDIP |
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DS1501YNIC 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 | -40°C ~ 85°C | Through Hole | - | - | 28-PDIP |
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RX-4571LCB PURE SNRX-4571LC:B RTC {SN-AG OR SN} VS |
0 | - |
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Datasheet |
RX-4571LC | 12-TFSOJ (0.094", 2.40mm Width) | Bulk | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS | YY-MM-DD | 3-Wire Serial | 1.6V ~ 5.5V | 1V ~ 5.5V | 950nA ~ 1µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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RX-8571LC:B PURE SN5+/-23PPM RTC BULK - CUT TAPE |
0 | - |
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Datasheet |
RX-8571LC | 12-TFSOJ (0.094", 2.40mm Width) | Bulk | Active | - | Clock/Calendar | Alarm, RAM | 16B | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | 1.3V ~ 5.5V | 0.4µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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MAX6902ETA+TIC RTC CLK/CALENDAR SPI 8TDFN |
0 | - |
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Datasheet |
- | 8-WDFN Exposed Pad | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Y2K | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 2V ~ 5.5V | - | 1.05µA ~ 4.2µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TDFN (3x3) |
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RX-4803SA:UAB PURE SNIC RTC CLK/CALENDAR SPI 14SOP |
0 | - |
|
Datasheet |
RX-4803SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 2.1µA ~ 3.4µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RX-8803SA:UA PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
0 | - |
|
Datasheet |
RX-8803SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | - | 2.1µA ~ 3.4µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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M41T00SC64MY6FIC RTC CLK/CALENDAR I2C 18SOX |
0 | - |
|
Datasheet |
- | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | EEPROM, Leap Year | 8KB | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 2.5V ~ 35V | 100µA (Typ) @ 2.7V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 18-SOX |
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DS2404BIC RTC BINARY CTR 1-WIRE 16SSOP |
0 | - |
|
Datasheet |
EconoRAM | 16-SSOP (0.209", 5.30mm Width) | Tube | Obsolete | Not Verified | Binary Counter | Alarm, Square Wave Output, SRAM | 512B | Binary | Binary | 1-Wire® and 3-Wire | 2.8V ~ 5.5V | 2.8V ~ 5.5V | 500µA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 16-SSOP |
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DS1501WE/T&RIC RTC CLK/CALENDAR PAR 28TSOP |
0 | - |
|
Datasheet |
- | 28-TSSOP (0.465", 11.80mm Width) | Tape & Reel (TR) | 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 | Surface Mount | - | - | 28-TSOP |
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DS1685-5IND+IC RTC CLK/CALENDAR PAR 24DIP |
0 | - |
|
Datasheet |
- | 24-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 5V | -40°C ~ 85°C | Through Hole | - | - | 24-PDIP |

