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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PT7C4302ZEEIC RTC CLK/CALENDAR SER 8TDFN |
3,697 |
|
Datasheet | - | 8-WFDFN Exposed Pad | Bulk | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Square Wave Output, Trickle-Charger | 31B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.2V ~ 5.5V | 1.5V ~ 5.5V | 25.3µA ~ 81µA @ 2V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-TDFN (2x3) |
|
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PT7C4372AZEEIC RTC CLK/CALENDAR I2C 8TDFN |
3,763 |
|
Datasheet | - | 8-WFDFN Exposed Pad | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 6V | - | 0.8µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-TDFN (2x3) |
|
|
PT7C4563ZEEIC RTC CLK/CALENDAR I2C 8TDFN |
2,723 |
|
Datasheet | - | 8-WFDFN Exposed Pad | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V | - | 0.65µA ~ 0.85µA @ 3V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-TDFN (2x3) |
|
RA-4574SA:B PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,326 |
|
Datasheet | RA-4574SA | 14-SOIC (0.197", 5.00mm Width) | Tube | 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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RA-4574SA:B0 PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,461 |
|
Datasheet | RA-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 |
|
RA-8565SA:B PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
2,328 |
|
Datasheet | RA-8565SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | - | 1µA ~ 1.8µA @ 3V ~ 5V | -40°C ~ 125°C | Surface Mount | - | - | 14-SOP |
|
|
RA-8565SA:B0 PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
2,258 |
|
Datasheet | RA-8565SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | - | 1µA ~ 1.8µA @ 3V ~ 5V | -40°C ~ 125°C | Surface Mount | - | - | 14-SOP |
|
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RA-8565SA:B3 PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
3,304 |
|
Datasheet | RA-8565SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C | 1.8V ~ 5.5V | - | 1µA ~ 1.8µA @ 3V ~ 5V | -40°C ~ 125°C | Surface Mount | - | - | 14-SOP |
|
RTC-4543SA:A ROHSIC RTC CLK/CALENDAR SER 14SOP |
4,749 |
|
Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Bulk | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 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:B:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
4,835 |
|
Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
|
RTC-4543SA:B ROHSIC RTC CLK/CALENDAR SER 14SOP |
4,926 |
|
Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 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:B3:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,124 |
|
Datasheet | RTC-4543SA | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 3-Wire Serial | 2.5V ~ 5.5V | - | 1µA ~ 3µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
RTC-4574JE:B ROHSIC RTC CLK/CALENDAR SER 20VSOJ |
1,846 |
|
Datasheet | RTC-4574JE | 20-LSSOJ (0.213", 5.40mm Width) | Strip | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | 3-Wire Serial | 1.6V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ |
|
RTC-4574NB:B ROHSIC RTC CLK/CALENDAR SER 22SON |
4,858 |
|
Datasheet | - | 22-LFDFN | Strip | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | 3-Wire Serial | 1.6V ~ 5.5V | - | 1µA ~ 2µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 22-SON (6.3x4.8) |
|
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RTC-4574SA:B:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,751 |
|
Datasheet | RTC-4574SA | 14-SOIC (0.197", 5.00mm Width) | Tube | 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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RTC-4574SA:B3:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,182 |
|
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 |
|
RTC-4701JE:B ROHSIC RTC CLK/CALENDAR SER 20VSOJ |
3,659 |
|
Datasheet | - | 20-LSSOJ (0.213", 5.40mm Width) | Strip | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | 3-Wire Serial | 1.6V ~ 5.5V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ |
|
RTC-4701NB:B ROHSIC RTC CLK/CALENDAR SER 22SON |
1,751 |
|
Datasheet | - | 22-LFDFN | Strip | Obsolete | Not Verified | Clock/Calendar | Alarm | - | - | - | 3-Wire Serial | 1.6V ~ 5.5V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 22-SON (6.3x4.8) |
|
RTC-72421A: PURE SNIC RTC CLK/CALENDAR PAR 18DIP |
4,775 |
|
Datasheet | RTC-72421 | 18-DIP (0.300", 7.62mm) | Bulk | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | - | Parallel | 4.5V ~ 5.5V | - | 5µA ~ 10µA @ 2V ~ 5V | -10°C ~ 70°C | Through Hole | - | - | 18-DIP |
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RTC-72421B: PURE SNIC RTC CLK/CALENDAR PAR 18DIP |
1,622 |
|
Datasheet | RTC-72421 | 18-DIP (0.300", 7.62mm) | Bulk | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | - | Parallel | 4.5V ~ 5.5V | - | 5µA ~ 10µA @ 2V ~ 5V | -10°C ~ 70°C | Through Hole | - | - | 18-DIP |
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.
How can I request pricing and availability?
Submit the part number, manufacturer and required quantity through our RFQ form. JIEXIN Electronics will review your request and provide available stock, pricing and sourcing information.
