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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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DS17285S-5/T&RIC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
|
Datasheet |
- | 24-SOIC (0.295", 7.50mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 2KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
|
DS12885QN/T&RIC RTC CLK/CALENDAR PAR 28PLCC |
0 | - |
|
Datasheet |
- | 28-LCC (J-Lead) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 114B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 4V | 15mA @ 4.5V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 28-PLCC (11.51x11.51) |
|
ISL12029IB27Z-TIC RTC CLK/CALENDAR I2C 14SOIC |
0 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | 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 |
|
ISL12028IV27Z-TIC RTC CLK/CALENDAR I2C 14TSSOP |
0 | - |
|
Datasheet |
- | 14-TSSOP (0.173", 4.40mm Width) | Tape & Reel (TR) | 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-TSSOP |
|
ISL12027IB27Z-TIC RTC CLK/CALENDAR I2C 8SOIC |
0 | - |
|
Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | 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 | - | - | 8-SOIC |
|
ISL1221IUZIC RTC EVENT REC I2C 10MSOP |
3 | - |
|
Datasheet |
- | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Time Event Recorder | 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 | - | - | 10-MSOP |
|
RX-4035SA:AAB PURE SNIC RTC TIME EVENT REC SPI 14SOP |
0 | - |
|
Datasheet |
RX-4035SA | 14-SOIC (0.197", 5.00mm Width) | Tube | Active | Not Verified | Time Event Recorder | Alarm | - | - | - | SPI | 2.4V ~ 5.5V | 1V ~ 5.5V | 2.5µA @ 3V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
DS1558W-TRLIC RTC CLK/CALENDAR PAR 48LQFP |
0 | - |
|
Datasheet |
- | 48-LQFP | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer, Y2K | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | 2.5V ~ 3.7V | 2mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 48-LQFP (7x7) |
|
DS1558Y-TRLIC RTC CLK/CALENDAR PAR 48LQFP |
0 | - |
|
Datasheet |
- | 48-LQFP | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Watchdog Timer, Y2K | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 6mA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 48-LQFP (7x7) |
|
RX-4803LCUA0 PURE SNRX-4803LC:UA0 PURE SN RTC +/-3.4 |
0 | - |
|
Datasheet |
RX-4803LC | 12-TFSOJ (0.094", 2.40mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | 4-Wire Serial | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 2.1µA ~ 3.4µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
|
RX-8803LCUA0 PURE SNRX-8803LC:UA0 PURE SN I2C-BUS RT |
0 | - |
|
Datasheet |
RX-8803LC | 12-TFSOJ (0.094", 2.40mm Width) | Tape & Reel (TR) | Active | - | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | 1.6V ~ 5.5V | 2.1µA ~ 3.4µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
|
RX8900SA:UBB PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
0 | - |
|
Datasheet |
RX8900SA | 14-SOIC (0.197", 5.00mm Width) | Bulk | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C | 2.5V ~ 5.5V | 1.6V ~ 5.5V | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
RX8900SA:UCB PURE SNIC RTC CLK/CALENDAR I2C 14SOP |
0 | - |
|
Datasheet |
RX8900SA | 14-SOIC (0.197", 5.00mm Width) | Bulk | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C | 2.5V ~ 5.5V | 1.6V ~ 5.5V | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOP |
|
RTC-8564JE:3IC RTC CLK/CALENDAR I2C 20VSOJ |
0 | - |
|
Datasheet |
- | 20-LSSOJ (0.213", 5.40mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Y2K | - | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.7µA ~ 0.8µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-VSOJ |
|
RX8900CE:UBBIC RTC CLK/CALENDAR I2C 10SMD |
0 | - |
|
Datasheet |
RX8900CE | 10-SMD, No Lead | Bulk | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C | 2.5V ~ 5.5V | 1.6V ~ 5.5V | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 10-SMD |
|
RX8900CEUCBIC RTC CLK/CALENDAR I2C 10SMD |
0 | - |
|
Datasheet |
RX8900CE | 10-SMD, No Lead | Bulk | Active | Not Verified | Clock/Calendar | Alarm | - | HH:MM:SS | YY-MM-DD | I2C | 2.5V ~ 5.5V | 1.6V ~ 5.5V | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-SMD |
|
MAX6917EO33+TIC RTC CLK/CAL/SUPER I2C 20QSOP |
0 | - |
|
- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 3V ~ 3.6V | - | - | -40°C ~ 85°C | Surface Mount | - | - | 20-QSOP |
|
MAX6916EO30+TIC RTC CLK/CAL/SUPER SPI 20QSOP |
0 | - |
|
- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI, 3-Wire Serial | 2.7V ~ 3.3V | - | - | - | Surface Mount | - | - | 20-QSOP |
|
MAX6916EO33+TIC RTC CLK/CAL/SUPER SPI 20QSOP |
0 | - |
|
- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI, 3-Wire Serial | 3V ~ 3.6V | - | - | - | Surface Mount | - | - | 20-QSOP |
|
MAX6916EO50+TIC RTC CLK/CAL/SUPER SPI 20QSOP |
0 | - |
|
- |
- | 20-SSOP (0.154", 3.90mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar/Supervisor | - | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI, 3-Wire Serial | 4.5V ~ 5.5V | - | - | - | Surface Mount | - | - | 20-QSOP |

