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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
ISL12028IB27Z-TIC RTC CLK/CALENDAR I2C 14SOIC |
97 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Bulk | 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 |
|
DS1685E-5IC RTC CLK/CALENDAR PAR 24TSSOP |
0 | - |
|
Datasheet |
- | 24-TSSOP (0.173", 4.40mm 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 | 4.5V ~ 5.5V | 2.5V ~ 3.7V | 3mA @ 5V | 0°C ~ 70°C | Surface Mount | - | - | 24-TSSOP |
|
X1228S14I-4.5AIC RTC CLK/CALENDAR I2C 14SOIC |
97 | - |
|
Datasheet |
- | 14-SOIC (0.154", 3.90mm Width) | Tube | 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 ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 14-SOIC |
|
DS17285-5IC RTC CLK/CALENDAR PAR 24DIP |
0 | - |
|
Datasheet |
- | 24-DIP (0.600", 15.24mm) | Tube | 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 | Through Hole | - | - | 24-PDIP |
|
DS17285E-3+IC RTC CLK/CALENDAR PAR 28-TSOP |
55 | - |
|
Datasheet |
* | - | Tray | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
CDP6818DXIC RTC CLK/CALENDAR 24CERDIP |
51 | - |
|
Datasheet |
- | 24-CDIP (0.300", 7.62mm) | Bulk | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | 50B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | - | 3V ~ 6V | - | 50µA ~ 3mA @ 3V ~ 5V | 0°C ~ 70°C (TA) | Through Hole | - | - | 24-CERDIP |
|
DS1315-33IC RTC PHANTOM CHIP PAR 16DIP |
0 | - |
|
Datasheet |
- | 16-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 1.1mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 16-PDIP |
|
DS12885TN+IC RTC CLK/CALENDAR PAR 32TQFP |
0 | - |
|
Datasheet |
- | 32-TQFP | 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 | - | - | 32-TQFP (7x7) |
|
V3022SO28A+IC RTC CLOCK/CALENDAR 28SOIC |
11 | - |
|
Datasheet |
- | 28-SOIC (0.295", 7.50mm Width) | Tube | Last Time Buy | Not Verified | Clock/Calendar | Alarm, Leap Year, RAM | 8B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | - | 2V ~ 5.5V | - | 15µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | - | - | 28-SOIC |
|
DS17885-3+IC RTC CLK/CALENDAR PAR 24DIP |
0 | - |
|
Datasheet |
- | 24-DIP (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | 8KB | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 2.7V ~ 3.7V | 2.5V ~ 3.7V | 2mA @ 2.7V ~ 3.7V | 0°C ~ 70°C | Through Hole | - | - | 24-PDIP |
|
CDP6818DIC RTC CLK/CALENDAR 24CERDIP |
61 | - |
|
Datasheet |
- | 24-CDIP (0.300", 7.62mm) | Bulk | Active | Not Verified | Clock/Calendar | Alarm, Leap Year, Square Wave Output | 50B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | - | 3V ~ 6V | - | 50µA ~ 3mA @ 3V ~ 5V | 0°C ~ 70°C (TA) | Through Hole | - | - | 24-CERDIP |
|
BQ4802YDWIC RTC CLK/CALENDAR PAR 28SOIC |
29 | - |
|
Datasheet |
- | 28-SOIC (0.295", 7.50mm Width) | Bulk | Active | Not Verified | Clock/Calendar | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 2.4V ~ 4V | 1.5mA (Typ) @ 4.5 V ~ 5.5 V | 0°C ~ 70°C | Surface Mount | - | - | 28-SOIC |
|
|
DS1553W-150IC RTC CLK/CALENDAR PAR 28EDIP |
0 | - |
|
Datasheet |
- | 28-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | 8KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | 3V | 2mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 28-EDIP |
|
|
DS1554W-120+IC RTC CLK/CALENDAR PAR 32-EDIP |
0 | - |
|
Datasheet |
- | 32-DIP Module (0.600", 15.24mm) | Bulk | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | 32KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | - | 4mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 32-EDIP |
|
DS1244WP-120IND+IC RTC PHANTOM CHIP PAR 34PCM |
0 | - |
|
Datasheet |
- | 34-PowerCap™ Module | Bulk | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 32KB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | 3V | 7mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 34-PowerCap Module |
|
|
DS1556W-120IC RTC CLK/CALENDAR PAR 32EDIP |
0 | - |
|
Datasheet |
- | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | 128KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | - | 4mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 32-EDIP |
|
DP8570AVIC RTC TIMER PERIPH PAR 28PLCC |
88 | - |
|
Datasheet |
- | 28-LCC (J-Lead) | Bulk | Active | Not Verified | Timer Clock Peripheral (TCP) | Alarm, Leap Year | 44B | 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) |
|
|
DS1251W-120+IC RTC PHANTOM PAR 32-DIP |
35 | - |
|
Datasheet |
- | 32-DIP Module (0.600", 15.24mm) | Bulk | Obsolete | Not Verified | Phantom Time Chip | Leap Year, NVSRAM | 512KB | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | - | 7mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 32-EDIP |
|
DS1315SN-33+IC RTC PHANTOM CHIP PAR 16SOIC |
23 | - |
|
Datasheet |
- | 16-SOIC (0.295", 7.50mm Width) | Tube | Active | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 1.1mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 16-SOIC |
|
DS1315EN-33+IC RTC PHANTOM CHIP PAR 20TSSOP |
14 | - |
|
Datasheet |
- | 20-TSSOP (0.173", 4.40mm Width) | Tube | Active | Not Verified | Phantom Time Chip | Leap Year | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 1.1mA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 20-TSSOP |

