Real Time Clocks
Explore Real Time Clocks parts from multiple manufacturers, with model information, availability, datasheets and technical specifications for engineering and purchasing.
For parts that are not shown in the list, send the manufacturer part number, quantity or BOM to JIEXIN Electronics. Our team can assist with availability checks and quotation support.
| Photo | Mfr. Part # | Availability | 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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ISL12028IB27Z-TIC RTC CLK/CALENDAR I2C 14SOIC |
1,307 |
|
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 |
4,127 |
|
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 |
4,990 |
|
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 |
2,252 |
|
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 |
4,192 |
|
Datasheet | * | - | Tray | Obsolete | Not Verified | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
|
CDP6818DXIC RTC CLK/CALENDAR 24CERDIP |
3,598 |
|
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 |
1,876 |
|
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 |
1,626 |
|
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 |
2,115 |
|
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 |
1,503 |
|
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 |
3,799 |
|
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 |
3,124 |
|
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 |
1,637 |
|
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 |
2,675 |
|
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 |
3,466 |
|
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 |
4,306 |
|
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 |
3,118 |
|
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) |
|
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DS1251W-120+IC RTC PHANTOM PAR 32-DIP |
4,841 |
|
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 |
4,972 |
|
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 |
1,867 |
|
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 |
Frequently Asked Questions
What are Real Time Clocks components used for?
Real Time Clocks components are used in a wide range of electronic equipment and systems. Their exact function depends on the device, circuit design and technical requirements of the application.
How do I choose the right Real Time Clocks part?
Compare the manufacturer part number, key specifications, package type, operating conditions, availability and datasheet information. For replacement projects, always verify the critical electrical and mechanical parameters before selecting an alternative.
Can JIEXIN Electronics help source obsolete or hard-to-find Real Time Clocks parts?
Yes. Send us the required manufacturer part number, quantity or BOM. Our sourcing team can help check stock availability, lead time, alternative sourcing options and quotation details.
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