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 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diodes Incorporated
|
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0.6µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.35V ~ 5.5V | |
Diodes Incorporated
|
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Price on request
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0.6µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.35V ~ 5.5V | |
Diodes Incorporated
|
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125µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | I²C, 2-Wire Serial | 56b | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.5V ~ 3.7V | |
Diodes Incorporated
|
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125µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | I²C, 2-Wire Serial | 56b | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.5V ~ 3.7V | |
Diodes Incorporated
|
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Price on request
Price and Stock
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0.6µA ~ 0.7µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.35V ~ 5.5V | |
Diodes Incorporated
|
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Price on request
Price and Stock
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0.8µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 6V | |
Diodes Incorporated
|
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Price on request
Price and Stock
on Request |
0.8µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 6V | |
Diodes Incorporated
|
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Price on request
Price and Stock
on Request |
0.65µA ~ 0.85µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-MSOP | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
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Price and Stock
on Request |
0.8µA @ 1.3V ~ 1.8V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.8µA @ 1.3V ~ 1.8V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.6µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.35V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.6µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.35V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.85µA ~ 0.9µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.85µA ~ 0.9µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.65µA ~ 0.85µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TSSOP | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.65µA ~ 0.85µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TSSOP | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
|
Osram
|
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- | - | - | - | - | - | - | - | - | - | - | |
Diodes Incorporated
|
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Price on request
Price and Stock
on Request |
25.3µA ~ 81µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output, Trickle-Charger | 3-Wire Serial | 31B | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.5V ~ 5.5V | |
Diodes Incorporated
|
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150µA @ 1.5V ~ 5.5V | YY-MM-DD | Leap Year, Square Wave Output, Y2K | I²C, 2-Wire Serial | 56B | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (24 hr) | Clock/Calendar | 2V ~ 3.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.8µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 6V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.65µA ~ 0.85µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
25.3µA ~ 81µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output, Trickle-Charger | 3-Wire Serial | 31B | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.5V ~ 5.5V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.8µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 6V | |
Diodes Incorporated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.65µA ~ 0.85µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-TDFN (2x3) | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 1.8µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm | I²C | - | Surface Mount | -40°C ~ 125°C | 14-SOP | HH:MM:SS | Clock/Calendar | 1.8V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 1.8µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm | I²C | - | Surface Mount | -40°C ~ 125°C | 14-SOP | HH:MM:SS | Clock/Calendar | 1.8V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 1.8µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm | I²C | - | Surface Mount | -40°C ~ 125°C | 14-SOP | HH:MM:SS | Clock/Calendar | 1.8V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 20-VSOJ | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
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1µA ~ 2µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 22-SON (6.3x4.8) | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 20-VSOJ | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 22-SON (6.3x4.8) | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
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5µA ~ 10µA @ 2V ~ 5V | - | Leap Year | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
5µA ~ 10µA @ 2V ~ 5V | - | Leap Year | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SSOP | - | Clock/Calendar | 2.4V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | - | Alarm | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SSOP | - | Clock/Calendar | 2.4V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1.2µA ~ 1.8µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | SPI | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.7V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
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0.95µA ~ 1µA @ 3V ~ 5V | - | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 12-VSOJ | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
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0.7µA ~ 0.9µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 12-VSOJ | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.7µA ~ 0.9µA @ 3V ~ 5V | - | Alarm | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 12-VSOJ | - | Clock/Calendar | 1.6V ~ 5.5V | |
Epson
|
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Price on request
Price and Stock
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- | - | - | - | - | - | - | - | - | - | - | |
Epson
|
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- | - | - | - | - | - | - | - | - | - | - |
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