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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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M48T129V-85PM1IC RTC CLOCK/CALENDAR PAR 32DIP |
0 | - |
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Datasheet |
Timekeeper® | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | - | 3mA @ 3V ~ 3.6V | 0°C ~ 70°C | Through Hole | - | - | 32-PMDIP Module |
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DS1251YP-70INDIC RTC PHANTOM CHIP PAR 34PCM |
0 | - |
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Datasheet |
- | 34-PowerCap™ Module | Tube | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 512kb | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 10mA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 34-PowerCap Module |
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DS1244W-120IND+IC RTC PHANTOM CHIP PAR 28EDIP |
0 | - |
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Datasheet |
- | 28-DIP Module (0.600", 15.24mm) | Tube | Active | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 32KB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | - | 7mA @ 3.3V | -40°C ~ 85°C | Through Hole | - | - | 28-EDIP |
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M48T129Y-70PM1IC RTC CLK/CALENDAR PAR 32DIP |
0 | - |
|
Datasheet |
Timekeeper® | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 4mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 32-PMDIP |
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M48T251Y-70PM1IC RTC PHANTOM CHIP PAR 32DIP |
0 | - |
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Datasheet |
Timekeeper® | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 5mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 32-PMDIP |
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DS1251WP-120IND+IC RTC PHANTOM CHIP PAR 34PCM |
0 | - |
|
Datasheet |
- | 34-PowerCap™ Module | Tube | Active | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 512KB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | 3V | 7mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 34-PowerCap Module |
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DS1747WP-120IC RTC CLK/CALENDAR PAR 34PCM |
0 | - |
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Datasheet |
- | 34-PowerCap™ Module | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Y2K | 512KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | 3V | 2mA @ 3.3V | 0°C ~ 70°C | Surface Mount | - | - | 34-PowerCap Module |
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M48T512V-85PM1IC RTC CLOCK/CALENDAR PAR 32DIP |
0 | - |
|
Datasheet |
Timekeeper® | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | - | 3mA @ 3V ~ 3.6V | 0°C ~ 70°C | Through Hole | - | - | 32-PMDIP Module |
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M48T512Y-70PM1IC RTC CLOCK/CALENDAR PAR 32DIP |
0 | - |
|
Datasheet |
Timekeeper® | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 4mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 32-PMDIP Module |
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DS1647-120IC RTC CLK/CALENDAR PAR 32EDIP |
0 | - |
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Datasheet |
- | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 512KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 4mA @ 4.5 V ~ 5.5 V | 0°C ~ 70°C | Through Hole | - | - | 32-EDIP |
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DS1254WB-C02IC RTC PHANTOM CHIP PAR 80BGA |
0 | - |
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Datasheet |
- | 80-BBGA | Tray | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 2MB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.7V | 3V | - | - | Surface Mount | - | - | 80-BGA (40x40) |
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M48T254V-10ZA1IC RTC PHANTOM PAR 168BGA |
0 | - |
|
Datasheet |
Timekeeper® | 168-PBGA Module | Tube | Obsolete | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | - | 3mA @ 3V ~ 3.6V | 0°C ~ 70°C | Surface Mount | - | - | 168-PBGA Module (42.3x42.3) |
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DS1254WB-150IC RTC PHANTOM CHIP PAR 168BGA |
0 | - |
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Datasheet |
- | 168-BBGA Module | Bag | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 2MB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.7V | 3V | 7mA @ 3.3V | 0°C ~ 70°C | Surface Mount | - | - | 168-BGA (40x40) |
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RTC-62421AIC RTC CLK/CALENDAR PAR 18DIP |
0 | - |
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Datasheet |
- | 18-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 1.8µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Through Hole | - | - | 18-DIP |
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RTC-72421AIC RTC CLK/CALENDAR PAR 18DIP |
0 | - |
|
Datasheet |
- | 18-DIP (0.300", 7.62mm) | Tube | 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 | -10°C ~ 70°C | Through Hole | - | - | 18-DIP |
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RTC-72421BIC RTC CLK/CALENDAR PAR 18DIP |
0 | - |
|
Datasheet |
- | 18-DIP (0.300", 7.62mm) | Tube | 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 | -10°C ~ 70°C | Through Hole | - | - | 18-DIP |
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RTC-72423AIC RTC CLK/CALENDAR PAR 24SOP |
0 | - |
|
Datasheet |
- | 24-SOIC (0.311", 7.90mm Width) | Tube | 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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RTC-72423BIC RTC CLK/CALENDAR PAR 24SOP |
0 | - |
|
Datasheet |
- | 24-SOIC (0.311", 7.90mm Width) | Tube | 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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NJU6355EDIC RTC CLK/CALENDAR SER 8DIP |
0 | - |
|
Datasheet |
- | 8-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 4-Wire Serial | 4.5V ~ 5.5V | - | 4µA ~ 15µA @ 2V ~ 5V | -30°C ~ 80°C | Through Hole | - | - | 8-DIP |
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RTC-63423BIC RTC CLK/CALENDAR PAR 24SOP |
0 | - |
|
- |
- | 24-SOIC (0.311", 7.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 24-SOP |

