What are Real Time Clocks ?
Real Time Clocks (RTCs) are integrated circuits designed to keep track of the current time and date, even when the main power is off. They are widely used in applications such as timers, clocks, and scheduling devices in consumer electronics and industrial systems. Important specifications for selecting RTCs include Current, which affects power consumption; Date Format, which determines how the time is displayed; and Operating Temperature, which ensures reliable performance in different environments. Procurement teams should validate lifecycle status and consider alternate-source options to mitigate sourcing risks.
Parts in this category
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| Part & Mfr | Total Stock | Pricing & RFQ | Accuracy | Applications | Clock Frequency | Conflict Minerals | Current | Date Format | Failure Rate | Features | Function | Halogen Free | Height | Industrial Grade | Input Voltage | Interface | Interrupt Output | Lead Spacing | Lead Style | Length | Memory Size | Mounting Style | Mounting Type | Number of Pins | Operating Range | Operating Temperature | Operating Voltage | Package / Case | Product Type | Storage Temperature | Supplier Device Package | Supplier Package | Supply Current | Supply Voltage | Tape & Reel | Temperature Range | Termination Style | Time Format | Type | Voltage | Voltage Supply | Watchdog Timer | Width | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Elantec Semiconductor Inc
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Elantec Semiconductor Inc
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, EEPROM, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C | - | - | - | - | 512B | - | Surface Mount | - | - | -40°C ~ 85°C (TA) | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, EEPROM, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C | - | - | - | - | 512B | - | Surface Mount | - | - | -40°C ~ 85°C (TA) | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 125µA ~ 200µA @ 3.63V ~ 5.5V | YY-MM-DD-dd | - | Leap Year, NVSRAM, Square Wave Output | - | - | - | - | - | I²C | - | - | - | - | 56B | - | Surface Mount | - | - | -40°C ~ 85°C (TA) | - | - | - | - | 16-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 3.7V | - | - | - | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 2mA @ 3V | YY-MM-DD-dd | - | Alarm, Daylight Savings, NVRAM, NVSRAM, Square Wave Output, Y2K | - | - | - | - | - | Parallel | - | - | - | - | 242B | - | Surface Mount | - | - | 0°C ~ 70°C (TA) | - | - | - | - | 24-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.5V ~ 3.7V | - | - | - | |
|
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 0.5µA ~ 0.7µA @ 1.6V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, RAM, Square Wave Output, Trickle Charger | - | - | - | - | - | I²C | - | - | - | - | 64B | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 10-LGA (5x5) | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.6V ~ 5.5V | - | - | - | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 0.3µA ~ 1µA @ 2V ~ 5V | YY-MM-DD-dd | - | Leap Year, NVSRAM, RAM, Trickle-Charger | - | - | - | - | - | 3-Wire Serial | - | - | - | - | 31B | - | Surface Mount | - | - | -40°C ~ 85°C (TA) | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 2V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Unique ID, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 14µA ~ 15µA @ 3V ~ 5V | YY-MM-DD-dd | - | Alarm, Daylight Savings, Leap Year, SRAM | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | 128B | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-TSSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 4µA ~ 6µA @ 3V ~ 5V | YY-MM-DD-dd | - | Alarm, Leap Year, SRAM | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | 2B | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-MSOP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
BenchPro
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 300µA @ 5V | YY-MM-DD-dd | - | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | - | - | - | - | - | Parallel | - | - | - | - | 114B | - | Through Hole | - | - | 0°C ~ 70°C | - | - | - | - | 24-PDIP | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.5V ~ 4V | - | - | - | |
BenchPro
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 1.5mA @ 4.5V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | Parallel | - | - | - | - | 16B | - | Surface Mount | - | - | 0°C ~ 70°C | - | - | - | - | 28-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.4V ~ 4V | - | - | - | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | - | Alarm, Leap Year | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 8-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - | |
Dallas Semiconductor
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | - | YY-MM-DD-dd | - | Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output | - | - | - | - | - | Parallel | - | - | - | - | 114B | - | Surface Mount | - | - | - | - | - | - | - | 28-PLCC (11.51x11.51) | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.5V ~ 4V | - | - | - | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request Send RFQ |
- | - | - | - | 10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | - | Alarm, Leap Year, Supervisor, Watchdog Timer | - | - | - | - | - | I²C, 2-Wire Serial | - | - | - | - | - | - | Surface Mount | - | - | -40°C ~ 85°C | - | - | - | - | 14-SOIC | - | - | - | - | - | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | - | - | - |
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