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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RTC-63421BIC RTC CLK/CALENDAR PAR 18DIP |
3,421 | - |
|
Datasheet | - | 18-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | - | -40°C ~ 85°C | Through Hole | - | - | 18-DIP |
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RTC-4553A2IC RTC CLK/CALENDAR SER 14SOP |
1,422 | - |
|
Datasheet | - | 14-SOIC (0.197", 5.00mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, SRAM | 120b | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 4-Wire Serial | 2.7V ~ 5.5V | - | 3µA @ 5V | -30°C ~ 70°C | Surface Mount | - | - | 14-SOP |
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NJU6355EMIC RTC CLK/CALENDAR SER 8EMP |
3,846 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | 4-Wire Serial | 4.5V ~ 5.5V | - | 4µA ~ 15µA @ 2V ~ 5V | -30°C ~ 80°C | Surface Mount | - | - | 8-EMP |
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RTC-4543SB:AIC RTC CLK/CALENDAR SER 18SOP |
1,966 | - |
|
Datasheet | - | 18-SOIC (0.213", 5.40mm 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 | - | - | 18-SOP |
|
RTC-72423A:2IC RTC CLK/CALENDAR PAR 24SOP |
1,292 | - |
|
Datasheet | - | 24-SOIC (0.311", 7.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 5µA ~ 10µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 24-SOP |
|
BQ3287EAMTIC RTC CLOCK/CALENDAR PAR 24DIP |
3,562 | - |
|
Datasheet | - | 24-DIP Module (0.61", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | - | 0°C ~ 70°C | Through Hole | - | - | 24-DIP Module |
|
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BQ3287EMTIC RTC CLOCK/CALENDAR PAR 24DIP |
4,935 | - |
|
Datasheet | - | 24-DIP Module (0.61", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | - | 0°C ~ 70°C | Through Hole | - | - | 24-DIP Module |
|
BQ4822YMA-70IC RTC CLK/CALENDAR PAR 28-DIP |
4,991 | - |
|
Datasheet | - | 28-DIP Module (0.61", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 6mA @ 2.2 V ~ 5.8 V | 0°C ~ 70°C | Through Hole | - | - | 28-DIP Module (18.42x37.72) |
|
BQ4842YMA-85IC RTC CLK/CALENDAR PAR 32DIP |
1,151 | - |
|
Datasheet | - | 32-DIP Module (0.610", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Supervisor, Watchdog Timer | - | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 4mA @ 4.5 V ~ 5.5 V | 0°C ~ 70°C | Through Hole | - | - | 32-DIP Module (18.42x42.8) |
|
BQ4845S-A4NIC RTC CLK/CALENDAR PAR 28SOIC |
1,781 | - |
|
Datasheet | - | 28-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.75V ~ 5.5V | 2.3V ~ 4V | 1.5mA (Typ) @ 4.5 V ~ 5.5 V | -40°C ~ 85°C | Surface Mount | - | - | 28-SOIC |
|
|
BQ4847MTIC RTC CLK/CALENDAR PAR 28-DIP |
4,453 | - |
|
Datasheet | - | 28-DIP Module (0.61", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.75V ~ 5.25V | 2.3V ~ 4V | - | 0°C ~ 70°C | Through Hole | - | - | 28-DIP Module |
|
|
BQ4847YMTIC RTC CLK/CALENDAR PAR 28-DIP |
3,920 | - |
|
Datasheet | - | 28-DIP Module (0.61", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.3V ~ 4V | - | 0°C ~ 70°C | Through Hole | - | - | 28-DIP Module |
|
|
BQ4850YMA-85IC RTC CLK/CALENDAR PAR 32DIP |
1,244 | - |
|
Datasheet | - | 32-DIP Module (0.610", 15.49mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 1mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 32-DIP Module (18.42x42.8) |
|
X1226S8IC RTC CLK/CALENDAR I2C 8SOIC |
1,460 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | 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 ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
|
|
X1227S8IC RTC CLK/CALENDAR I2C 8SOIC |
2,570 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 | 4.5V ~ 5.5V | 1.8V ~ 5.5V | 10µA ~ 20µA @ 2.7V ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
|
X1227S8-2.7IC RTC CLK/CALENDAR I2C 8SOIC |
3,470 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
|
|
X1227S8-2.7AIC RTC CLK/CALENDAR I2C 8SOIC |
4,642 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
|
|
X1227S8-4.5AIC RTC CLK/CALENDAR I2C 8SOIC |
3,800 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | 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 | 4.5V ~ 5.5V | 1.8V ~ 5.5V | 10µA ~ 20µA @ 2.7V ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 8-SOIC |
|
X1228S14IC RTC CLK/CALENDAR I2C 14SOIC |
4,072 | - |
|
Datasheet | - | 14-SOIC (0.154", 3.90mm Width) | Tube | 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 ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 14-SOIC |
|
|
X1228S14-2.7IC RTC CLK/CALENDAR I2C 14SOIC |
3,964 | - |
|
Datasheet | - | 14-SOIC (0.154", 3.90mm Width) | Tube | 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 ~ 5V | 0°C ~ 70°C | Surface Mount | - | - | 14-SOIC |
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.
