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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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DS1501YZ+T&RIC RTC CLK/CALENDAR PAR 28SOIC |
0 | - |
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Datasheet |
- | 28-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Active | 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 | Surface Mount | - | - | 28-SOIC |
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RTC-7301SF:B3 ROHSIC RTC CLK/CALENDAR PAR 24SSOP |
0 | - |
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Datasheet |
- | 24-SOP (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 | Parallel | 2.4V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 24-SSOP |
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M48T201V-85MH1EIC RTC CLK/CALENDAR PAR 44SOH |
0 | - |
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Datasheet |
Timekeeper® | 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 3V | 2mA @ 3V ~ 3.6V | 0°C ~ 70°C | Surface Mount | - | - | 44-SOH |
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M48T201Y-70MH1EIC RTC CLK/CALENDAR PAR 44SOH |
0 | - |
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Datasheet |
Timekeeper® | 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Supervisor, Watchdog Timer, Y2K | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 3mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Surface Mount | - | - | 44-SOH |
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DS1615IC RTC TEMP RECORDER SER 16DIP |
0 | - |
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Datasheet |
- | 16-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Temperature Recorder | Alarm, Leap Year, Unique ID, Y2K | 32B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 4V ~ 5.5V | 2.7V ~ 4.95V | 0.5µA @ 5V | -40°C ~ 85°C | Through Hole | - | - | 16-PDIP |
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DS1384FP-12+IC RTC CLK/CALENDAR PAR 44MQFP |
0 | - |
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Datasheet |
- | 44-QFP | Bag | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | 50B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.4V ~ 4V | 3mA @ 5V | 0°C ~ 70°C | Surface Mount | - | - | 44-MQFP (10x10) |
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DS32C35-33#IC RTC CLK/CALENDAR I2C 20SOIC |
0 | - |
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Datasheet |
- | 20-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, FRAM, Leap Year, Square Wave Output, TCXO/Crystal | 8KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.63V | 2.3V ~ 3.6V | 110µA @ 3.63V | 0°C ~ 70°C | Surface Mount | - | - | 20-SOIC |
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DS32C35-33IND#IC RTC CLK/CALENDAR I2C 20SOIC |
0 | - |
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Datasheet |
- | 20-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, FRAM, Leap Year, Square Wave Output, TCXO/Crystal | 8KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 3.63V | 2.3V ~ 3.6V | 110µA @ 3.63V | -40°C ~ 85°C | Surface Mount | - | - | 20-SOIC |
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DS1315EN-5IC RTC PHANTOM CHIP PAR 20TSSOP |
0 | - |
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Datasheet |
- | 20-TSSOP (0.173", 4.40mm Width) | 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 | 2.5V ~ 3.7V | 1.3mA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-TSSOP |
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DS1315SN-33IC RTC PHANTOM CHIP PAR 16SOIC |
0 | - |
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Datasheet |
- | 16-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 1.1mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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M48T212V-85MH1FIC RTC CLK/CALENDAR PAR 44SOH |
0 | - |
|
Datasheet |
Timekeeper® | 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer, Y2K | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 3V | 2mA @ 3V ~ 3.6V | 0°C ~ 70°C | Surface Mount | - | - | 44-SOH |
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DS17485S-3+IC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
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Datasheet |
- | 24-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 4KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 2.7V ~ 3.7V | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
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M48T59Y-70MH6EIC RTC CLK/CALENDAR PAR 28SOH |
0 | - |
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- |
Timekeeper® | 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets | 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 | - | 3mA @ 4.5V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 28-SOH |
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M41T256YMT7FIC RTC CLK/CALENDAR I2C 44SOH |
0 | - |
|
Datasheet |
Timekeeper® | 44-BSOP (0.337", 8.56mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 32KB | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | 2.5V ~ 3.5V | 2.5mA @ 4.5V ~ 5.5V | -25°C ~ 70°C | Surface Mount | - | - | 44-SOH |
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DS1501YZN+T&RIC RTC CLK/CALENDAR PAR 28SOIC |
0 | - |
|
Datasheet |
- | 28-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Active | 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 | Surface Mount | - | - | 28-SOIC |
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DS17485S-5+T&RIC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
|
Datasheet |
- | 24-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 4KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
|
M41T256YMH7FIC RTC CLK/CALENDAR I2C 44SOH |
0 | - |
|
Datasheet |
Timekeeper® | 44-BSOP (0.337", 8.56mm Width) requires SNAPHAT | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 32KB | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | 2.5V ~ 3.5V | 2.5mA @ 4.5V ~ 5.5V | -25°C ~ 70°C | Surface Mount | - | - | 44-SOH |
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COM-10079REAL TIME CLOCK - DS3234 |
0 | - |
|
- |
- | 20-SOIC (0.295", 7.50mm Width) | Bulk | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM | 256B | HH:MM:SS (12/24 hr) | YY-MM-DD | SPI | 2V ~ 5.5V | 2V ~ 3.8V | 120µA ~ 160µA @ 3.63V ~ 5.5V | 0°C ~ 70°C (TA) | Surface Mount | - | - | 20-SOIC |
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DS1501WZ+IC RTC CLK/CALENDAR PAR 28SOIC |
0 | - |
|
Datasheet |
- | 28-SOIC (0.295", 7.50mm Width) | Tube | Active | 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-SOIC |
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RX-4803LC:AA3 PURE SNIC RTC CLK/CALENDAR SPI 12VSOJ |
0 | - |
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Datasheet |
RX-4803LC | 12-TFSOJ (0.094", 2.40mm Width) | Tape & Reel (TR) | 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 | - | - | 12-VSOJ |

