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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
MCP79512-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
252 | - |
|
- |
- | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 10-MSOP |
|
PCF85053ATKJIC CPU RTC I2C SOT2413-1 |
10,169 | - |
|
Datasheet |
- | 12-VFDFN Exposed Pad | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Daylight Savings, Leap Year, SRAM | 128B | HH:MM:SS (12/24 hr) | YY-MM-DD | I2C | 1.7V ~ 3.6V | 1.55V ~ 3.6V | 1mA @ 3.3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 12-HVSON (3x3) |
|
R2043T-E2-FIC RTC CLK/CALENDAR SER 10TSSOP |
7,039 | - |
|
Datasheet |
- | 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 4-Wire Serial | 1.7V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 10-TSSOPG |
|
MCP79522-I/MSIC RTC CLK/CALENDAR SPI 10MSOP |
1,438 | - |
|
- |
- | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 10-MSOP |
|
PCA85063ATT/AJIC RTC CLK/CALENDAR I2C 8TSSOP |
11,454 | - |
|
Datasheet |
- | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tape & Reel (TR) | Not For New Designs | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 0.9V ~ 5.5V | - | 1.8µA @ 5V | -40°C ~ 105°C | Surface Mount | Automotive | AEC-Q100 | 8-TSSOP |
|
S-35392A-I8T1UIC RTC CLK/CALENDAR I2C SNT8A |
18,774 | - |
|
Datasheet |
- | 8-SMD, Flat Leads | Tape & Reel (TR) | Active | 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 | - | - | SNT-8A |
|
ECS-RTC-SOP8-5101A-TRIC RTC CLOCK/CALENDAR I2C 8SOP |
5,028 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS | YY-MM-DD-dd | I2C, Serial | 1.6V ~ 5.5V | - | 0.5µA ~ 0.52µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOP |
|
MCP795W10-I/SLIC RTC CLK/CALENDAR SPI 14SOIC |
434 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
|
MCP795W10-I/STIC RTC CLK/CALENDAR SPI 14TSSOP |
497 | - |
|
Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-TSSOP |
|
MCP795W21-I/SLIC RTC CLK/CALENDAR SPI 14SOIC |
258 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 1.8V ~ 3.6V | 1.3V ~ 3.6V | 1µA @ 1.8V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
|
RX8130CE:B3IC RTC EVENT REC I2C MODULE |
24,083 | - |
|
Datasheet |
RX8130CE | 10-SMD Module | Tape & Reel (TR) | Active | Not Verified | Time Event Recorder | Alarm, Leap Year | - | HH:MM:SS (24 hr) | YY-MM-DD | I2C, 2-Wire Serial | 1.6V ~ 5.5V | 1.1V ~ 5.5V | - | -40°C ~ 85°C | Surface Mount | - | - | Module |
|
PCA21125T/Q900/1,1IC RTC CLK/CALENDAR SPI 14TSSOP |
297 | - |
|
Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 1.6V ~ 5.5V | - | 30.3µA @ 2V ~ 5V | -40°C ~ 125°C | Surface Mount | - | - | 14-TSSOP |
|
RV-8263-C8-32.768KHZ-20PPM-TA-QAIC RTC CLK/CALENDAR I2C 8-SMT |
624 | - |
|
Datasheet |
C8 | 8-WCDFN | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm, Leap Year, Offset Compensation, Programmable Clock Output, RAM, Timer | 1B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.24µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | Automotive | AEC-Q200 | 8-SON (2x1.2) |
|
RV-8263-C7-32.768KHZ-20PPM-TA-QAIC RTC CLK/CALENDAR I2C 8SON |
2,332 | - |
|
Datasheet |
C7 | 8-WCDFN | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Programmable Clock Output, RAM, Timer | 1B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.24µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | Automotive | AEC-Q200 | 8-SON (3.2x1.5) |
|
ISL1208IB8ZIC RTC CLK/CALENDAR I2C 8SOIC |
2,294 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | 2B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 4µA ~ 6µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
|
RX4111CE B6IC RTC CLK/CALENDAR SPI 10SMD |
341 | - |
|
Datasheet |
RX4111CE | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | SPI, 4-Wire Serial | 1.6V ~ 5.5V | - | 3µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-SMD |
|
AB1815-T3IC RTC CLK/CALENDAR SPI 16QFN |
21,719 | - |
|
Datasheet |
- | 16-VFQFN Exposed Pad | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer | 256B | HH:MM:SS:hh | YY-MM-DD-dd | SPI | 1.7V ~ 3.6V | 1.5V ~ 3.6V | 0.17µA ~ 0.22µA @ 1.8V ~ 3V | -40°C ~ 85°C | Surface Mount | - | - | 16-QFN (3x3) |
|
RX8111CE A0IC RTC CLK/CALENDAR I2C 10SMD |
1,592 | - |
|
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 | - | 3µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-SMD |
|
M41T01M6FIC RTC CLK/CALENDAR I2C 8SOIC |
1,986 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Leap Year | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 2V ~ 5.5V | 2.5V ~ 3.5V | 70µA @ 2V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
|
|
PCF2131TFYIC RTC CLK/CALENDAR I2C 16HLSON |
2,811 | - |
|
Datasheet |
- | 16-LFDFN Exposed Pad | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I2C, SPI | 1.2V ~ 5.5V | 1.2V ~ 5.5V | 770nA ~ 2.135µA @ 1.2V ~ 5.5V | -40°C ~ 85°C (TA) | Surface Mount, Wettable Flank | - | - | 16-HLSON (4.5x3.5) |

