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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
DS1343D-18+IC RTC CLK/CALENDAR SPI 14TDFN |
0 | - |
|
Datasheet |
- | 14-WFDFN Exposed Pad | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger | 96B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 1.71V ~ 5.5V | 1.3V ~ 5.5V | - | -40°C ~ 85°C | Surface Mount | - | - | 14-TDFN (3x3) |
|
DS1347T+IC RTC CLK/CALENDAR SPI 8TDFN |
0 | - |
|
Datasheet |
- | 8-WDFN Exposed Pad | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, SRAM | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | 2V ~ 5.5V | - | 0.7µA ~ 0.8µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TDFN (3x3) |
|
AS1801-BTDTULTRA-LOW POWER, IC SERIAL REAL- |
0 | - |
|
Datasheet |
- | 8-UFDFN Exposed Pad | 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 ~ 3.6V | 0.9V ~ 3.6V | 0.5µA @ 1.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TDFN (2x2) |
|
PCF2123U/12AA/1,00IC RTC/CALENDAR SPI UNCASED |
0 | - |
|
Datasheet |
* | - | Bulk | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
PCF2123U/5GA/1,015IC RTC/CALENDAR SPI UNCASED |
0 | - |
|
Datasheet |
* | - | Bulk | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
PCF8523U/12AA/1,00IC RTC/CALENDAR UNCASED DIE FFC |
0 | - |
|
Datasheet |
* | - | Bulk | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
PCF8564AU/5BD/1,01IC RTC/CALENDAR UNCASED DIE |
0 | - |
|
Datasheet |
* | - | Bulk | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
DS1339AD+TIC RTC CLOCK/CALENDAR I2C 8TDFN |
0 | - |
|
Datasheet |
- | - | 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 | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 200µA @ 1.71V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TDFN EP |
|
DS1341T+IC RTC CLK/CALENDAR I2C 8TDFN |
0 | - |
|
Datasheet |
- | 8-WDFN Exposed Pad | Tube | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.5µA ~ 0.6µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-TDFN (3x3) |
|
PCA8802CX8/B/1,027IC RTC BINARY COUNTER I2C DIE |
0 | - |
|
Datasheet |
- | Die | Tape & Reel (TR) | Obsolete | Not Verified | Binary Counter | Square Wave Output, Unique ID | - | Binary | Binary | I2C, 2-Wire Serial | 1.6V ~ 5.5V | - | 0.4µA @ 1.6V ~ 5.5V | -40°C ~ 85°C | - | - | - | Die |
|
DP8573AVXIC RTC CLK/CALENDAR PAR 28PLCC |
0 | - |
|
Datasheet |
- | 28-LCC (J-Lead) | Tape & Reel (TR) | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.2V ~ 5.1V | 1µA @ 5V | -40°C ~ 85°C | Surface Mount | - | - | 28-PLCC (11.51x11.51) |
|
DS1254WB2-150IC RTC PHANTOM CHIP PAR 80BGA |
0 | - |
|
- |
- | 80-BBGA | Tray | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 2MB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.7V | 3V | 7mA @ 3.3V | 0°C ~ 70°C | Surface Mount | - | - | 80-BGA (40x40) |
|
DS1318IC RTC ELAPSED CNT PAR 24TSSOP |
0 | - |
|
- |
- | 24-TSSOP (0.173", 4.40mm Width) | Tube | Obsolete | Not Verified | Elapsed Time Counter | Alarm, Square Wave Output | - | Binary | Binary | Parallel | 3V ~ 3.6V | 1.6V ~ 3.7V | 150µA @ 3V ~ 3.6V | -40°C ~ 85°C | Surface Mount | - | - | 24-TSSOP |
|
DS1371UIC RTC BINARY COUNTER I2C 8UMAX |
0 | - |
|
- |
- | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Binary Counter | Alarm, Square Wave Output, Watchdog Timer | - | Binary | Binary | I2C, 2-Wire Serial | 1.7V ~ 5.5V | - | 1.3µA @ 1.7V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
|
DS1374U-33IC RTC BINARY COUNTER I2C 10UMAX |
0 | - |
|
Datasheet |
- | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Binary Counter | Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer | - | Binary | Binary | I2C, 2-Wire Serial | 2.97V ~ 5.5V | 1.3V ~ 5.5V | 175µA @ 2.97V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 10-uMAX/uSOP |
|
DS1391U-33IC RTC CLK/CALENDAR SPI 10UMAX |
0 | - |
|
Datasheet |
- | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Trickle-Charger | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | SPI | 2.97V ~ 5.5V | 1.3V ~ 5.5V | 175µA @ 2.97V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 10-uMAX/uSOP |
|
PCA8802U/2AA/1,026IC RTC BINARY COUNTER I2C DIE |
0 | - |
|
- |
- | Die | Tray | Obsolete | Not Verified | Binary Counter | Square Wave Output, Unique ID | - | Binary | Binary | I2C, 2-Wire Serial | 1.6V ~ 5.5V | - | 0.4µA @ 1.6V ~ 5.5V | -40°C ~ 85°C | - | - | - | Die |
|
PCA8802UG/12KB/1,0IC RTC BINARY COUNTER I2C 8WLCSP |
0 | - |
|
- |
- | 8-XFBGA, WLCSP | Bulk | Obsolete | Not Verified | Binary Counter | Square Wave Output, Unique ID | - | Binary | Binary | I2C, 2-Wire Serial | 1.6V ~ 5.5V | - | 0.4µA @ 1.6V ~ 5.5V | -40°C ~ 85°C | Surface Mount | - | - | 8-WLCSP |
|
PCF8564AU/5GC/1,01IC RTC CLOCK/CALENDAR I2C DIE |
0 | - |
|
Datasheet |
- | Die | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1V ~ 5.5V | - | 0.6µA ~ 0.75µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | Die |
|
1337GDCGI8IC 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 | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.8V ~ 5.5V | - | 0.6µA @ 1.3V ~ 1.8V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |

