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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
DS1340U-18IC RTC CLOCK/CALENDAR I2C 8UMAX |
3,266 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, Trickle-Charger | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 100µA @ 1.89V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
|
|
DS1340U-3IC RTC CLOCK/CALENDAR I2C 8UMAX |
4,043 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, Trickle-Charger | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 125µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-uMAX/uSOP |
|
DS1340Z-18IC RTC CLK/CALENDAR I2C 8SOIC |
1,415 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, Trickle-Charger | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 1.71V ~ 5.5V | 1.3V ~ 3.7V | 100µA @ 1.89V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
|
|
DS1340Z-3IC RTC CLK/CALENDAR I2C 8SOIC |
1,946 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, Trickle-Charger | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.7V ~ 5.5V | 1.3V ~ 3.7V | 125µA @ 3.3V | -40°C ~ 85°C | Surface Mount | - | - | 8-SOIC |
|
PCF8563P/F4,112IC RTC CLOCK/CALENDAR I2C 8DIP |
4,485 |
|
Datasheet | - | 8-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, 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 | Through Hole | - | - | 8-DIP |
|
|
PCF8583P/F5,112IC RTC CLOCK/CALENDAR I2C 8DIP |
3,590 |
|
Datasheet | - | 8-DIP (0.300", 7.62mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Alarm, NVSRAM, Square Wave Output | 240B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD | I2C, 2-Wire Serial | 2.5V ~ 6V | - | 10µA ~ 50µA @ 1V ~ 5V | -40°C ~ 85°C | Through Hole | - | - | 8-DIP |
|
PCF8563T/F4,112IC RTC CLOCK/CALENDAR I2C 8SO |
3,494 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Discontinued at Digi-Key | Not Verified | Clock/Calendar | Alarm, Leap Year, 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 | - | - | 8-SO |
|
|
PCF8593T/1,112IC RTC CLOCK/CALENDAR I2C 8SO |
1,703 |
|
Datasheet | - | 8-SOIC (0.154", 3.90mm Width) | Tube | Discontinued at Digi-Key | Not Verified | Clock/Calendar | Alarm, NVSRAM | 8B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I2C, 2-Wire Serial | 2.5V ~ 6V | - | 8µA ~ 15µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | - | - | 8-SO |
|
M48T86MH1FIC RTC CLK/CALENDAR PAR 28SOH |
1,030 |
|
Datasheet | - | 28-SOP (0.350", 8.89mm Width) with SNAPHAT Sockets | Tape & Reel (TR) | 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 |
|
ISL1208IU8IC RTC CLK/CALENDAR I2C 8MSOP |
3,044 |
|
Datasheet | - | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | Tube | Obsolete | Not Verified | Clock/Calendar | 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 | - | - | 8-MSOP |
|
DS1742W-150+IC RTC CLK/CALENDAR PAR 24EDIP |
3,130 |
|
Datasheet | - | 24-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Y2K | 2KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 2.97V ~ 3.63V | - | 2mA @ 3.3V | 0°C ~ 70°C | Through Hole | - | - | 24-EDIP |
|
DS1743-100+IC RTC CLK/CALENDAR PAR 28EDIP |
1,520 |
|
Datasheet | - | 28-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Y2K | 8KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 3mA @ 5V | 0°C ~ 70°C | Through Hole | - | - | 28-EDIP |
|
DS1743P-100+IC RTC CLK/CALENDAR PAR 34PCM |
1,210 |
|
Datasheet | - | 34-PowerCap™ Module | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM, Y2K | 8KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 3mA @ 5V | 0°C ~ 70°C | Surface Mount | - | - | 34-PowerCap Module |
|
|
DS14287+IC RTC CLK/CALENDAR PAR 24EDIP |
4,492 |
|
Datasheet | - | 24-DIP Module (0.600", 15.24mm) | Tube | 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 ~ 3.6V | 0.5µA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Through Hole | - | - | 24-EDIP |
|
DS1501WE+IC RTC CLK/CALENDAR PAR 28TSOP |
1,830 |
|
Datasheet | - | 28-TSSOP (0.465", 11.80mm Width) | Tray | Obsolete | Not Verified | Clock/Calendar | Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K | 256B | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 3V ~ 3.6V | 2.5V ~ 3.7V | 4mA @ 3V ~ 3.6V | 0°C ~ 70°C | Surface Mount | - | - | 28-TSOP |
|
|
DS1642-100+IC RTC CLK/CALENDAR PAR 24EDIP |
2,672 |
|
Datasheet | - | 24-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 2KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 3mA @ 5V | 0°C ~ 70°C | Through Hole | - | - | 24-EDIP |
|
|
DS1643-100+IC RTC CLK/CALENDAR PAR 28EDIP |
2,872 |
|
Datasheet | - | 28-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 8KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 3mA @ 5V | 0°C ~ 70°C | Through Hole | - | - | 28-EDIP |
|
|
DS1644P-120+IC RTC CLK/CALENDAR PAR 34PCM |
1,345 |
|
Datasheet | - | 34-PowerCap™ Module | Tray | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 32KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 4mA @ 4.5V ~ 5.5V | 0°C ~ 70°C | Surface Mount | - | - | 34-PowerCap Module |
|
DS1646-120+IC RTC CLK/CALENDAR PAR 32EDIP |
1,111 |
|
Datasheet | - | 32-DIP Module (0.600", 15.24mm) | Tube | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 128KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 4mA @ 4.5 V ~ 5.5 V | 0°C ~ 70°C | Through Hole | - | - | 32-EDIP |
|
|
DS1646P-120+IC RTC CLK/CALENDAR PAR 34PCM |
4,518 |
|
Datasheet | - | 34-PowerCap™ Module | Tray | Obsolete | Not Verified | Clock/Calendar | Leap Year, NVSRAM | 128KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | 3V | 4mA @ 4.5 V ~ 5.5 V | 0°C ~ 70°C | Surface Mount | - | - | 34-PowerCap Module |
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.
How can I request pricing and availability?
Submit the part number, manufacturer and required quantity through our RFQ form. JIEXIN Electronics will review your request and provide available stock, pricing and sourcing information.
