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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R2051S02-E2-FHIGH PRECISION I2C-BUS REAL-TIME |
4,829 | - |
|
Datasheet | * | - | Tape & Reel (TR) | Active | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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R2051S03-E2-FHIGH PRECISION I2C-BUS REAL-TIME |
2,799 | - |
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Datasheet | * | - | Tape & Reel (TR) | Active | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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S-35390AH-J8T2ULINEAR IC |
2,510 | - |
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Datasheet | S-35390A H | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 2-Wire Serial | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA ~ 1.4µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | - | - | 8-SOP-J |
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S-35390AH-T8T2ULINEAR IC |
3,153 | - |
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Datasheet | S-35390A H | 8-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 2-Wire Serial | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA ~ 1.4µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | - | - | 8-TSSOP |
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S-35190AH-J8T2ULINEAR IC |
3,236 | - |
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Datasheet | S-35190A H | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA ~ 1.4µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | - | - | 8-SOP-J |
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S-35190AH-T8T2ULINEAR IC |
1,720 | - |
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Datasheet | S-35190A H | 8-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.3V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA ~ 1.4µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | - | - | 8-TSSOP |
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MCP79400T-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
1,893 | - |
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Datasheet | - | 8-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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S-35199A01-HRT1IC RTC CLK/CALENDAR SER 12UFBGA |
3,306 | - |
|
Datasheet | - | 12-UFBGA, WLBGA | Tape & Reel (TR) | Not For New Designs | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 1.3V ~ 5.5V | - | 8µA ~ 14µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-UFBGA, WLBGA |
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S-35399A02-HRT1IC RTC CLK/CALENDAR I2C 12UFBGA |
1,849 | - |
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Datasheet | - | 12-UFBGA, WLBGA | Tape & Reel (TR) | Not For New Designs | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V | - | 14µA ~ 30µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-UFBGA, WLBGA |
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MCP79401T-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
2,331 | - |
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Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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MCP79402T-I/SNIC RTC CLK/CALENDAR I2C 8SOIC |
1,106 | - |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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PT7C4563WEXIC RTC CLK/CALENDAR I2C 8SOIC |
1,537 | - |
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Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | 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-SOIC |
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PT7C4311ZEE+DMXIC RTC CLK/CALENDAR I2C 8TDFN |
3,370 | - |
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Datasheet | - | 8-WFDFN Exposed Pad | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Leap Year, Square Wave Output, Y2K | 56B | HH:MM:SS (24 hr) | YY-MM-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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S-35399A03-J8T2GIC RTC CLOCK/CALENDAR I2C 8SOP |
3,237 | - |
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Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Not For New Designs | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.3V ~ 5.5V | - | 14µA ~ 30µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOP-J |
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RX8111CE A6IC RTC CLK/CALENDAR I2C 10SMD |
1,075 | - |
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Datasheet | RX8111CE | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | 1.1V ~ 5.5V | 3µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-SMD |
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MCP79401T-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
2,666 | - |
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Datasheet | - | 8-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
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MCP79401T-I/MSIC RTC CLK/CALENDAR I2C 8MSOP |
1,107 | - |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-MSOP |
|
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MCP79402T-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
4,536 | - |
|
Datasheet | - | 8-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-TSSOP |
|
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MCP79402T-I/MSIC RTC CLK/CALENDAR I2C 8MSOP |
2,361 | - |
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Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-MSOP |
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PT7C4563UEXIC RTC CLK/CALENDAR I2C 8MSOP |
1,199 | - |
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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 | - | 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-MSOP |
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.
