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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Nisshinbo Micro Devices
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- | - | - | - | - | - | - | - | - | - | - | |
Diodes Incorporated
|
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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
|
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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-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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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 | |
ROHM Semiconductor
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1µA ~ 1.35µA @ 3V ~ 5.5V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOP-J | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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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-MSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.2V ~ 5.5V | |
Diodes Incorporated
|
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0.8µA @ 1.2V ~ 1.8V | 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 (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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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 | 8-TDFN (2x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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0.8µA @ 1.2V ~ 1.8V | 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 (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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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-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Diodes Incorporated
|
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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
|
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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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250µA @ 3V ~ 5.5V | YY-MM-DD | Alarm, Leap Year, Square Wave Output | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C (TA) | 8-MSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 3.7V | |
Diodes Incorporated
|
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0.8µA @ 1.2V ~ 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
|
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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-SOIC | HH:MM:SS (24 hr) | Clock/Calendar | 2V ~ 3.5V | |
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Epson
|
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4µA @ 3V | YY-MM-DD | Alarm, Watchdog Timer | I²C | - | Surface Mount | -40°C ~ 85°C (TA) | 10-SMD | HH:MM:SS | Clock/Calendar | 1.1V ~ 5.5V | |
Diodes Incorporated
|
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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
|
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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 | |
ABLIC Inc.
|
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0.93µA ~ 1.1µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOP-J | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
ABLIC Inc.
|
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0.93µA ~ 1.1µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
ABLIC Inc.
|
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8µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | SNT-8A | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
ABLIC Inc.
|
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14µA ~ 30µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | SNT-8A | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
|
Nisshinbo Micro Devices
|
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Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
|
Nisshinbo Micro Devices
|
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Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
|
Nisshinbo Micro Devices
|
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Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
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-SOIC | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Diodes Incorporated
|
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Price on request
Price and Stock
on Request |
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-SOIC | HH:MM:SS (24 hr) | Clock/Calendar | 2V ~ 3.5V | |
|
Nisshinbo Micro Devices
|
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- | - | - | - | - | Surface Mount | - | QFN023023-16 | - | - | - | |
|
Nisshinbo Micro Devices
|
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- | - | - | - | - | - | - | - | - | - | - | |
|
Nisshinbo Micro Devices
|
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- | - | - | - | - | Surface Mount | - | QFN023023-16 | - | - | - | |
|
Nisshinbo Micro Devices
|
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Price and Stock
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- | - | - | - | - | - | - | - | - | - | - | |
|
Nisshinbo Micro Devices
|
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Price and Stock
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- | - | - | - | - | - | - | - | - | - | - | |
Nisshinbo Micro Devices
|
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0.9µA ~ 2µA @ 3V ~ 6V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.7V ~ 6V | |
Nisshinbo Micro Devices
|
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0.8µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 10-SSOP-G | HH:MM:SS (12/24 hr) | Clock/Calendar | 2V ~ 5.5V | |
|
Epson
|
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3µA @ 3V | YY-MM-DD | Alarm | I²C | - | Surface Mount | -40°C ~ 85°C (TA) | 10-SMD | HH:MM:SS | Clock/Calendar | 1.1V ~ 5.5V | |
|
Epson
|
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0.32µA ~ 0.35µA @ 3V ~ 5V | YY-MM-DD | Alarm, RAM | I²C | 16B | Surface Mount | -40°C ~ 85°C | 8-SOP | HH:MM:SS | Clock/Calendar | 1.1V ~ 5.5V | |
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Nisshinbo Micro Devices
|
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on Request |
- | - | - | - | - | - | - | - | - | - | - | |
|
Nisshinbo Micro Devices
|
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Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
ABLIC Inc.
|
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8µA ~ 14µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 12-UFBGA, WLBGA | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
ABLIC Inc.
|
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14µA ~ 30µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 12-UFBGA, WLBGA | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
ABLIC Inc.
|
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14µA ~ 30µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOP-J | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 5.5V | |
Analog Devices / Maxim Integrated
|
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200µA @ 3.3V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | I²C, 2-Wire Serial | 56B | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 3.7V | |
Renesas
|
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0.65µA @ 1.8V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-MSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 3.6V | |
Analog Devices / Maxim Integrated
|
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0.5µA ~ 0.7µA @ 1.6V ~ 5.5V | YY-MM-DD-dd | Alarm, Leap Year, RAM, 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
|
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500µA @ 3.63V | Binary | Trickle-Charger | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | Binary | Binary Counter | 1.3V ~ 3.63V | |
STMicroelectronics
|
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3mA @ 4.5V ~ 5.5V | YY-MM-DD-dd | Leap Year, Watchdog Timer | Parallel | - | Through Hole | 0°C ~ 70°C | 28-PCDIP, CAPHAT® | HH:MM:SS (24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Analog Devices / Maxim Integrated
|
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125µA ~ 200µA @ 3.63V ~ 5.5V | YY-MM-DD-dd | Leap Year, NVSRAM, Square Wave Output | I²C, 2-Wire Serial | 56B | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.3V ~ 3.7V | |
Analog Devices / Maxim Integrated
|
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125µA @ 3.3V | YY-MM-DD-dd | Leap Year, Trickle-Charger | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (24 hr) | Clock/Calendar | 1.3V ~ 3.7V | |
Analog Devices / Maxim Integrated
|
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175µA @ 2.97V ~ 5.5V | Binary | Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 10-uMAX/uSOP | Binary | Binary Counter | 1.3V ~ 5.5V | |
Renesas
|
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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 | 20-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V |
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