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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RTC-8564NBB0 ROHSIC RTC CLK/CALENDAR I2C 22SON |
0 | - |
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Datasheet |
RTC-8564NB | 22-SMD, 20 Leads, Flat Leads | Tape & Reel (TR) | Active | 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 | - | - | 22-SON |
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RX8804CE XA0IC RTC CLK/CALENDAR I2C 10SMD |
0 | - |
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Datasheet |
RX8804CE | 10-SMD, No Lead | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Watchdog Timer | - | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | 1.5V ~ 5.5V | 1.5µA ~ 1.6µA @ 3V ~ 5V | -40°C ~ 105°C (TA) | Surface Mount | - | - | 10-SMD |
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M41T93SMY6EIC RTC CLK/CALENDAR SPI 18SOX |
0 | - |
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Datasheet |
- | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer | 7B | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | SPI | 3V ~ 5.5V | 1.8V ~ 5.5V | 10µA @ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 18-SOX |
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M41T93ZMY6EIC RTC CLK/CALENDAR SPI 18SOX |
0 | - |
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Datasheet |
- | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer | 7B | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | SPI | 2.38V ~ 5.5V | 1.8V ~ 5.5V | 10µA @ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 18-SOX |
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RX-4803LCUB0 PURE SNIC RTC CLK/CALENDAR SPI 12VSOJ |
0 | - |
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Datasheet |
- | - | Tape & Reel (TR) | Active | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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ISL12022IBZ-TIC RTC CLK/CALENDAR I2C 8SOIC |
0 | - |
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- |
- | 8-SOIC (0.154", 3.90mm Width) | Tape & Reel (TR) | Active | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, SRAM | 128B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 14µA ~ 15µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
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DS1685-5IC RTC CLK/CALENDAR PAR 24DIP |
0 | - |
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Datasheet |
- | 24-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 5V | 0°C ~ 70°C | Through Hole | - | - | 24-PDIP |
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DS1685-3IC RTC CLK/CALENDAR PAR 24DIP |
0 | - |
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Datasheet |
- | 24-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 3V | 0°C ~ 70°C | Through Hole | - | - | 24-PDIP |
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BQ3285S-SB2TRG4IC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
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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 | 114B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.5V ~ 4V | - | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
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ISL12024IBZIC RTC CLK/CALENDAR I2C 8SOIC |
0 | - |
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Datasheet |
- | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Unique ID | - | 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 |
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DS1305ENIC RTC CLK/CALENDAR SPI 20TSSOP |
0 | - |
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Datasheet |
- | 20-TSSOP (0.173", 4.40mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Trickle-Charger | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 2V ~ 5.5V | 2V ~ 5.5V | 25.3µA ~ 81µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 20-TSSOP |
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DS1305NIC RTC CLK/CALENDAR SPI 16DIP |
0 | - |
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Datasheet |
- | 16-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Trickle-Charger | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 2V ~ 5.5V | 2V ~ 5.5V | 25.3µA ~ 81µA @ 2V ~ 5V | -40°C ~ 85°C | Through Hole | - | - | 16-PDIP |
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M48T86MH1EIC RTC CLK/CALENDAR PAR 28SOH |
0 | - |
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Datasheet |
- | 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output | 114B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 15mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Surface Mount | - | - | 28-SOH |
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RX-8803LCUC0 PURE SNIC RTC CLK/CALENDAR I2C 12VSOJ |
0 | - |
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Datasheet |
- | - | Tape & Reel (TR) | Active | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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DS1339U-2+T&RIC RTC CLOCK/CALENDAR I2C 8UMAX |
0 | - |
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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, Trickle-Charger | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | 1.3V ~ 3.7V | 100µA @ 2.2V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
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RX4111CE BBIC RTC CLK/CALENDAR SPI 10SMD |
0 | - |
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Datasheet |
RX4111CE | 10-SMD, No Lead | Bulk | Active | Not Verified | Clock/Calendar | Alarm, RAM | - | 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 |
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M41T56C64MY6EIC RTC CLK/CALENDAR I2C 18SOX |
0 | - |
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Datasheet |
- | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | EEPROM, Leap Year, NVSRAM | 56B, 8KB | HH:MM:SS | YY-MM-DD-dd | I2C, 2-Wire Serial | 4.5V ~ 5.5V | 2.5V ~ 3.5V | 100µA (Typ) @ 4.5V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 18-SOX |
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RX-8731LC:B3IC RTC CLK/CALENDAR I2C 12VSOJ |
0 | - |
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Datasheet |
RX-8731LC | 12-TFSOJ (0.094", 2.40mm Width) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, EEPROM, Leap Year, Unique ID | 80b | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C | 1.7V ~ 5.5V | - | 1.4µA ~ 1.5µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 12-VSOJ |
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DS1685S-3IC RTC CLK/CALENDAR PAR 24SOIC |
0 | - |
|
Datasheet |
- | 24-SOIC (0.295", 7.50mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output, Y2K | 242B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 3V | 0°C ~ 70°C | Surface Mount | - | - | 24-SOIC |
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RX8111CE ABIC RTC CLK/CALENDAR I2C 10SMD |
0 | - |
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Datasheet |
RX8111CE | 10-SMD, No Lead | Bulk | Active | Not Verified | Clock/Calendar | Alarm, RAM | - | HH:MM:SS | YY-MM-DD | I2C | 1.6V ~ 5.5V | - | 3µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 10-SMD |

