Real Time Clocks
Explore Real Time Clocks parts from multiple manufacturers, with model information, availability, datasheets and technical specifications for engineering and purchasing.
For parts that are not shown in the list, send the manufacturer part number, quantity or BOM to JIEXIN Electronics. Our team can assist with availability checks and quotation support.
| Photo | Mfr. Part # | Availability | 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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DS1372U+IC RTC BINARY COUNTER I2C 8UMAX |
284 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Binary Counter | Alarm, Square Wave Output, Watchdog Timer | - | Binary | Binary | I2C, 2-Wire Serial | 2.4V ~ 5.5V | - | 0.8µA @ 2.4V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1342U+IC RTC CLOCK/CALENDAR I2C 8UMAX |
211 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.6µA ~ 0.7µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1337+IC RTC CLOCK/CALENDAR I2C 8DIP |
448 |
|
Datasheet | - | 8-DIP (0.300", 7.62mm) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.6µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Through Hole | - | - | 8-PDIP |
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ISL1208IU8Z-T7AIC RTC CLK/CALENDAR I2C 8MSOP |
292 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Active | 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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DS1339BU+IC RTC CLOCK/CALENDAR I2C 8UMAX |
1,065 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 1.71V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1302S+T&RIC RTC CLK/CALENDAR SER 8SOIC |
5,998 |
|
Datasheet | - | 8-SOIC (0.209", 5.30mm Width) | Tape & Reel (TR) | Active | 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 | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
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RX-8025NB:AA3 PURE SNIC RTC CLK/CALENDAR I2C 22SON |
1,954 |
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Datasheet | RX-8025NB | 22-LFDFN | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.7V ~ 5.5V | - | 1.2µA ~ 1.8µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 22-SON (6.3x4.8) |
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ECS-RTC-3225-5699C3-TRIC RTC CLK/CALENDAR I2C 10SMD |
1,857 |
|
Datasheet | - | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS | YY-MM-DD-dd | I2C, Serial | 2.5V ~ 5V | 1.6V ~ 5V | 4.9µA ~ 5.1µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 10-SMD |
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DS1339U-3+IC RTC CLOCK/CALENDAR I2C 8UMAX |
1,214 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 150µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1672U-33+IC RTC BINARY COUNTER I2C 8UMAX |
619 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Binary Counter | Trickle-Charger | - | Binary | Binary | I2C, 2-Wire Serial | 2.97V ~ 3.63V | 1.3V ~ 3.63V | 500µA @ 3.63V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1308U-18+IC RTC CLOCK/CALENDAR I2C 8UMAX |
139 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output | 56B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 5.5V | 100µA @ 200µA @ 1.89V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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ISL12022MAIBZIC RTC CLK/CALENDAR I2C 20SOIC |
1,107 |
|
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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ISL12022MIBZIC RTC CLK/CALENDAR I2C 20SOIC |
712 |
|
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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DS1340U-18+IC RTC CLOCK/CALENDAR I2C 8UMAX |
768 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Leap Year, Trickle-Charger | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 100µA @ 1.89V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1391U-3+IC RTC CLK/CALENDAR SPI 10UMAX |
695 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 2.7V ~ 3.3V | 1.3V ~ 3.7V | 125µA @ 2.7V ~ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 10-uMAX/uSOP |
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DS1390U-18+IC RTC CLK/CALENDAR SPI 10UMAX |
300 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.71V ~ 1.89V | 1.3V ~ 3.7V | 100µA @ 1.71V ~ 1.89V | -40°C ~ 85°C | Surface Mount | - | - | 10-uMAX/uSOP |
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DS1338U-3+IC RTC CLOCK/CALENDAR I2C 8UMAX |
136 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output | 56B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1338U-18+IC RTC CLOCK/CALENDAR I2C 8UMAX |
133 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output | 56B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 100µA @ 1.89V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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DS1374U-3+IC RTC BINARY COUNTER I2C 10UMAX |
4,748 |
|
Datasheet | - | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Binary Counter | Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer | - | Binary | Binary | I2C, 2-Wire Serial | 2.7V ~ 3.3V | 1.3V ~ 3.7V | 125µA @ 2.7V ~ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 10-uMAX/uSOP |
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RX8804CE XB3IC RTC CLK/CALENDAR I2C 10SMD |
1,135 |
|
Datasheet | RX8804CE | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm | - | - | - | I2C | 1.6V ~ 5.5V | - | 1.5µA ~ 1.6µA @ 3V ~ 5V | -40°C ~ 105°C | Surface Mount | - | - | 10-SMD |
Frequently Asked Questions
What are Real Time Clocks components used for?
Real Time Clocks components are used in a wide range of electronic equipment and systems. Their exact function depends on the device, circuit design and technical requirements of the application.
How do I choose the right Real Time Clocks part?
Compare the manufacturer part number, key specifications, package type, operating conditions, availability and datasheet information. For replacement projects, always verify the critical electrical and mechanical parameters before selecting an alternative.
Can JIEXIN Electronics help source obsolete or hard-to-find Real Time Clocks parts?
Yes. Send us the required manufacturer part number, quantity or BOM. Our sourcing team can help check stock availability, lead time, alternative sourcing options and quotation details.
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