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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RTC-4543SA:A:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
2,618 |
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Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Strip | Obsolete | Not Verified | Clock/Calendar | - | - | - | - | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RTC-4543SA:A3:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,021 |
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Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | - | - | - | - | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RTC-4543SA:B0:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
4,253 |
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Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | - | - | - | - | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RTC-4574SA:B0:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,202 |
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Datasheet | RTC-4574SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | 3-Wire Serial | 1.6V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RX-8581SA:B0:PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
4,252 |
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Datasheet | RX-8581SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | I2C | 1.8V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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RX-8581SA:B:PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
4,655 |
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Datasheet | RX-8581SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | I2C | 1.8V ~ 5.5V | - | 0.8µA ~ 1.2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
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MAX31341BEWC+IC RTC CLK/CALENDAR I2C 12WLP |
1,517 |
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Datasheet | - | 12-WFBGA, WLBGA | Strip | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | 64B | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C | 1.6V ~ 3.6V | 1.6V ~ 3.6V | 0.33µA ~ 0.39µA @ 1.6V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 12-WLP (2.14x1.56) |
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DS1306EN+T&R/C04IC INTEGRATED CIRCUIT |
4,622 |
|
Datasheet | * | - | Tape & Reel (TR) | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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1337ACSRIIC RTC CLK/CALENDAR I2C 16SOIC |
1,560 |
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Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | 1.3V ~ 3.7V | 0.6µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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1337CSRIIC RTC CLK/CALENDAR I2C 16SOIC |
4,934 |
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Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | 1.3V ~ 3.7V | 0.6µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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1337CSRI8IC RTC CLK/CALENDAR I2C 16SOIC |
2,992 |
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Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | 1.3V ~ 3.7V | 0.6µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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1338A-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
3,156 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output | 56b | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 5µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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1338A-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
1,807 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output | 56b | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 5µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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1339A-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
2,568 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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1339A-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
2,417 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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1339B-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
3,383 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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1339B-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
4,662 |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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ISL12028IBZ-TIC RTC CLK/CALENDAR I2C 14SOIC |
4,163 |
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Datasheet | - | 14-SOIC (0.154", 3.90mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 10µA ~ 20µA @ 2.7V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
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V3023SO28A+IC RTC CLOCK/CALENDAR 28SOIC |
1,830 |
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Datasheet | - | 28-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, RAM | 8B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | - | 2V ~ 5.5V | - | 15µA @ 5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 28-SOIC |
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RA-4565SA B3 PURE SNIC RTC CLK/CALENDAR SPI 14SOP |
3,663 |
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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 | YY-MM-DD-dd | SPI, 4-Wire Serial | 1.6V ~ 5.5V | - | 1.6µA ~ 2µA @ 3V ~ 5V | -40°C ~ 125°C | Surface Mount | Automotive | AEC-Q200 | 14-SOP |
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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