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.
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| Part & Mfr | Current | Date Format | Features | Interface | Memory Size | Mounting Type | Operating Temperature | Supplier Device Package | Time Format | Type | Voltage | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
|
Analog Devices / Maxim Integrated
|
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7mA @ 3.3V | YY-MM-DD-dd | Leap Year, NVSRAM | Parallel | 2MB | Surface Mount | 0°C ~ 70°C | 80-BGA (40x40) | HH:MM:SS:hh (12/24 hr) | Phantom Time Chip | 3V | |
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
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Price on request
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
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Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
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Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
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Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
|
Epson
|
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0.8µA ~ 1.2µA @ 3V ~ 5V | - | Alarm | I²C | - | Surface Mount | -40°C ~ 85°C | 22-SON (6.3x4.8) | - | Clock/Calendar | 1.8V ~ 5.5V | |
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|
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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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-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
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Price and Stock
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 8-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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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 | 8-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 8-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
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10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 16-SOIC | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Supervisor, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 14-TSSOP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V |
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