Available 24/7 at
0755-82798135Real Time Clocks
Real Time Clock (RTC) ICs are timing components used to maintain accurate time and calendar information in electronic systems, even when the main power is turned off. They are widely used in embedded systems, industrial control, consumer electronics, communication equipment, medical devices, automotive electronics, IoT products, meters and data logging applications.
This category includes real time clock ICs, battery-backed RTCs, low-power RTCs, I2C RTCs, SPI RTCs, calendar clock ICs and related clock/timing components. These devices are commonly selected based on timekeeping accuracy, backup power support, interface type, alarm functions, operating voltage, current consumption, package type and application requirements.
TomatoElec supplies original Real Time Clock RTC ICs from recognized semiconductor manufacturers such as Microchip, NXP, STMicroelectronics, Renesas, Texas Instruments, Analog Devices, onsemi, Infineon and other major brands. As an in-stock electronic components supplier and independent distributor, TomatoElec provides inventory support, original component sourcing and BOM sourcing services for global customers.
| 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 |
0 | - |
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Datasheet |
* | - | Tape & Reel (TR) | Active | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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R2051S03-E2-FHIGH PRECISION I2C-BUS REAL-TIME |
0 | - |
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Datasheet |
* | - | Tape & Reel (TR) | Active | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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S-35390AH-J8T2ULINEAR IC |
0 | - |
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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 |
0 | - |
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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 |
0 | - |
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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 |
0 | - |
|
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 |
0 | - |
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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 |
0 | - |
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- |
- | 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 |
0 | - |
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- |
- | 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 |
0 | - |
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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 |
0 | - |
|
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 |
0 | - |
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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 |
0 | - |
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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 |
0 | - |
|
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 |
|
RX8111CE A6IC RTC CLK/CALENDAR I2C 10SMD |
0 | - |
|
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 |
0 | - |
|
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 |
|
MCP79401T-I/MSIC RTC CLK/CALENDAR I2C 8MSOP |
0 | - |
|
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 |
|
|
MCP79402T-I/STIC RTC CLK/CALENDAR I2C 8TSSOP |
0 | - |
|
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 |
0 | - |
|
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 |
0 | - |
|
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 |

