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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
RTC-4543SA:A:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
2,618 | - |
|
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 |
|
|
RTC-4543SA:A3:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,021 | - |
|
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 |
|
|
RTC-4543SA:B0:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
4,253 | - |
|
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 |
|
|
RTC-4574SA:B0:PURE SNIC RTC CLK/CALENDAR SER 14SOP |
1,202 | - |
|
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 |
|
|
RX-8581SA:B0:PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
4,252 | - |
|
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 |
|
|
RX-8581SA:B:PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
4,655 | - |
|
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 |
|
MAX31341BEWC+IC RTC CLK/CALENDAR I2C 12WLP |
1,517 | - |
|
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) |
|
DS1306EN+T&R/C04IC INTEGRATED CIRCUIT |
4,622 | - |
|
Datasheet | * | - | Tape & Reel (TR) | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
1337ACSRIIC RTC CLK/CALENDAR I2C 16SOIC |
1,560 | - |
|
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 |
|
|
1337CSRIIC RTC CLK/CALENDAR I2C 16SOIC |
4,934 | - |
|
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 |
|
|
1337CSRI8IC RTC CLK/CALENDAR I2C 16SOIC |
2,992 | - |
|
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 |
|
1338A-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
3,156 | - |
|
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 |
|
|
1338A-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
1,807 | - |
|
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 |
|
|
1339A-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
2,568 | - |
|
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 |
|
|
1339A-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
2,417 | - |
|
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 |
|
|
1339B-31DVGIIC RTC CLK/CALENDAR I2C 8TSSOP |
3,383 | - |
|
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 |
|
|
1339B-31DVGI8IC RTC CLK/CALENDAR I2C 8TSSOP |
4,662 | - |
|
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 |
|
ISL12028IBZ-TIC RTC CLK/CALENDAR I2C 14SOIC |
4,163 | - |
|
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 |
|
V3023SO28A+IC RTC CLOCK/CALENDAR 28SOIC |
1,830 | - |
|
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 |
|
|
RA-4565SA B3 PURE SNIC RTC CLK/CALENDAR SPI 14SOP |
3,663 | - |
|
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 |
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.
