Real Time Clocks
Browse available Real Time Clocks part numbers with manufacturer references, stock information, pricing, datasheets and key specifications. Use the table below to compare options for your project.
For BOM, shortage or hard-to-find requirements, send your part number and quantity to Winsun (HK) Electronics for availability, lead-time and quotation support.
| 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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RA8900CE UB3IC RTC CLK/CALENDAR I2C 10SMD |
3,824 | - |
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Datasheet | - | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C | 2.5V ~ 5.5V | - | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | Automotive | AEC-Q200 | 10-SMD |
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RA8804CE XB3IC RTC CLK/CALENDAR I2C 10SMD |
3,132 | - |
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Datasheet | - | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD-dd | I2C | 1.6V ~ 5.5V | - | 1.5µA ~ 1.6µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | Automotive | AEC-Q200 | 10-SMD |
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PT7C4311AZEEXIC RTC CLK/CALENDAR I2C 8TDFN |
3,187 | - |
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Datasheet | - | 8-WFDFN Exposed Pad | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Square Wave Output | 56B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.2V ~ 5.5V | 2V ~ 3.5V | 150µA @ 1.5V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-TDFN (2x3) |
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PT7C4307AZEEXIC RTC CLK/CALENDAR I2C 8TDFN |
1,542 | - |
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Datasheet | - | 8-WFDFN Exposed Pad | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Square Wave Output | 56B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | 2V ~ 3.5V | 1.5mA @ 4.5V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 8-TDFN (2x3) |
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1339BC-31SRGIIC RTC CLK/CALENDAR I2C 16SOIC |
1,148 | - |
|
Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, Serial | 3.3V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 16-SOIC |
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1339AC-31CSRGIIC RTC CLK/CALENDAR I2C 16SOIC |
4,116 | - |
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Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, Serial | 3.3V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 16-SOIC |
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1339AC-31CSRGI8IC RTC CLK/CALENDAR I2C 16SOIC |
4,135 | - |
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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, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, Serial | 3.3V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 16-SOIC |
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1339BC-31SRGI8IC RTC CLK/CALENDAR I2C 16SOIC |
3,329 | - |
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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, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, Serial | 3.3V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 3.63V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 16-SOIC |
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1337BCSRGIIC RTC CLK/CALENDAR I2C 16SOIC |
3,239 | - |
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Datasheet | - | 16-SOIC (0.295", 7.50mm Width) | Tube | 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 | - | - | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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1337BCSRGI8IC RTC CLK/CALENDAR I2C 16SOIC |
1,211 | - |
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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 | - | - | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
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RV-3129-C3-32.768KHZ-OPTION-B-TA-QAIC RTC CLK/CALENDAR I2C 10SON |
3,335 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RV-3129-C3-32.768KHZ-OPTION-B-TB-QCIC RTC CLK/CALENDAR I2C 10SON |
4,045 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 125°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RV-3149-C3-32.768KHZ-OPTION-B-TA-QAIC RTC CLK/CALENDAR SPI 10SON |
1,218 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | SPI, 4-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RV-3149-C3-32.768KHZ-OPTION-A-TB-QCIC RTC CLK/CALENDAR SPI 10SON |
4,958 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | SPI, 4-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 125°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RV-3129-C3-32.768KHZ-OPTION-A-TB-QCIC RTC CLK/CALENDAR I2C 10SON |
4,135 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 125°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RV-3149-C3-32.768KHZ-OPTION-B-TB-QCIC RTC CLK/CALENDAR SPI 10SON |
4,800 | - |
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Datasheet | C3 | 10-VCDFN | Bulk | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, RAM, Trickle Charger | 2B, 8B | HH:MM:SS | YY-MM-DD-dd | SPI, 4-Wire Serial | 1.3V ~ 5.5V, 2.1V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 125°C | Surface Mount | - | - | 10-SON (3.7x2.5) |
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RX-4574LCB PURE SNRX-4574LC:B RTC {SN-AG OR SN} 5+ |
2,598 | - |
|
Datasheet | RX-4574LC | 12-TFSOJ (0.094", 2.40mm Width) | Bulk | Obsolete | - | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | 3-Wire Serial | 1.6V ~ 5.5V | 1.3V ~ 5.5V | 700nA ~ 900nA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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RS5C316B-E2-FBWIRE INTERFACE REAL-TIME CLOCK |
1,590 | - |
|
Datasheet | - | 8-LSSOP (0.173", 4.40mm Width) | Bulk | Obsolete | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD | Parallel, Serial | 2.5V ~ 6V | - | 1.5µA ~ 2µA @ 3V ~ 6V | -40°C ~ 85°C | Surface Mount | - | - | 8-SSOP |
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RV5C348A-E2-FBWIRE INTERFACE REAL-TIME CLOCK |
3,155 | - |
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Datasheet | - | - | Bulk | Obsolete | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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RS5C338A-E2-FBWIRE INTERFACE REAL-TIME CLOCK |
2,005 | - |
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Datasheet | - | 10-LFSOP (0.173", 4.40mm Width) | Bulk | Obsolete | - | Clock/Calendar | Alarm, Leap Year | 8B | HH:MM:SS (12/24 hr) | YY-MM-DD | 3-Wire Serial | 2V ~ 5.5V | - | 0.8µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 10-SSOP |
Real Time Clocks FAQ
Common questions about selecting, comparing and sourcing Real Time Clocks components through Winsun (HK) Electronics.
What should I check when selecting Real Time Clocks components?
Compare the manufacturer part number, electrical specifications, package, operating conditions and application requirements. The product datasheet should be used to confirm technical suitability.
Can Winsun help source specific Real Time Clocks part numbers?
Yes. Send the exact part number, manufacturer and required quantity. Winsun (HK) Electronics can assist with availability checks, quotation support and sourcing options based on your requirement.
Do you support shortage, obsolete or hard-to-find Real Time Clocks parts?
Yes. Our sourcing team can review shortage and obsolete-part requirements and help check available supply channels or possible alternatives when appropriate.
How do I request a quote for Real Time Clocks components?
Submit an RFQ with the part number, manufacturer, quantity and target delivery requirement. Our sales team will review your request and follow up with current sourcing information.
