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
Tap rows to select parts
Compare stocked parts across manufacturers and distributors, then add lines to your RFQ.
| Part & Mfr | Current | Date Format | Features | Interface | Memory Size | Mounting Type | Operating Temperature | Supplier Device Package | Time Format | Type | Voltage | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.3µA ~ 1µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year, NVSRAM, Trickle-Charger | 3-Wire Serial | 31B | Surface Mount | -40°C ~ 85°C | 16-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 2V ~ 5.5V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
3mA @ 5V | YY-MM-DD-dd | Alarm, NVSRAM, Square Wave Output, Y2K | Parallel | 242B | Surface Mount | 0°C ~ 70°C | 24-SOIC | 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 |
- | YYYY-MM-DD | - | Multiplexed | 242B | Surface Mount | 0°C ~ 70°C | 24-SOIC | HH:MM:SS | Real Time Clock (RTC) | 3V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
25.3µA ~ 81µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, NVSRAM, Trickle-Charger | SPI | 96B | Surface Mount | -40°C ~ 85°C | 20-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 2V ~ 5.5V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | YYYY-MM-DD | - | Multiplexed | 242B | Surface Mount | 0°C ~ 70°C | 24-TSSOP | HH:MM:SS | Real Time Clock (RTC) | 5V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
2mA @ 3V | YY-MM-DD-dd | Alarm, NVSRAM, Square Wave Output, Y2K | Parallel | 242B | Surface Mount | 0°C ~ 70°C | 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 |
25.3µA ~ 81µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, NVSRAM, Square Wave Output, Trickle-Charger | SPI | 96B | Surface Mount | -40°C ~ 85°C | 20-TSSOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 2V ~ 5.5V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | YY-MM-DD-dd | Alarm, Leap Year, NVSRAM, Y2K | I²C, 2-Wire Serial | 32B | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Time Event Recorder | 2.6V ~ 3.5V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
3mA @ 5V | YY-MM-DD-dd | Alarm, NVSRAM, Square Wave Output, Y2K | Parallel | 242B | Surface Mount | -40°C ~ 85°C | 24-SOIC | 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 |
3mA @ 5V | YY-MM-DD-dd | Alarm, NVSRAM, Square Wave Output, Y2K | Parallel | 242B | Surface Mount | -40°C ~ 85°C | 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 |
100µA @ 3.3V | YY-MM-DD-dd | Alarm, Leap Year, Watchdog Timer | 3-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 20-TSSOP | HH:MM:SS (12/24 hr) | Portable System Controller | 2.5V ~ 3.7V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
100µA @ 3V | YY-MM-DD-dd | Alarm, Leap Year, Watchdog Timer | 3-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 20-TSSOP | HH:MM:SS (12/24 hr) | Portable System Controller | 2.5V ~ 3.7V | |
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
300µA @ 5V | YY-MM-DD-dd | Alarm, Leap Year, Watchdog Timer | 3-Wire Serial | - | Surface Mount | 0°C ~ 70°C | 20-TSSOP | HH:MM:SS (12/24 hr) | Portable System Controller | 2.5V ~ 3.7V | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request |
10µA ~ 20µA @ 2.7V ~ 5.5V | YY-MM-DD-dd | Alarm, Leap Year, Unique ID | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
|
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.33µA ~ 0.38µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Watchdog Timer | SPI | - | - | -40°C ~ 85°C | Die | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.6V ~ 5.5V | |
|
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.6µA ~ 0.75µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | Die | HH:MM:SS (24 hr) | Clock/Calendar | 1V ~ 5.5V | |
|
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.33µA ~ 0.38µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Watchdog Timer | SPI | - | Surface Mount | -40°C ~ 85°C | Die | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.6V ~ 5.5V | |
|
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.6µA ~ 0.75µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | Die | HH:MM:SS (24 hr) | Clock/Calendar | 1V ~ 5.5V | |
|
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.5µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, Watchdog Timer | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | Die | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
0.885µA @ 3.3V | YY-MM-DD-dd | Alarm, Leap Year, Watchdog Timer | I²C, 2-Wire Serial | 64B | Surface Mount | -40°C ~ 85°C (TA) | 10-DFN (2.6x2.6) | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 0.9V ~ 5.5V | |
BenchPro
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
|
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request |
4µA ~ 6µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, SRAM | I²C, 2-Wire Serial | 8B | 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 |
0.65µA @ 1.8V | YY-MM-DD-dd | Alarm, Leap Year | I²C, 2-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 8-TDFN (3x3) | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 3.6V | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | |
|
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request |
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 | |
Intersil
|
Send RFQ |
Price on request
Price and Stock
on Request |
4µA ~ 6µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year, SRAM | I²C, 2-Wire Serial | 2B | Surface Mount | -40°C ~ 85°C | 10-MSOP | HH:MM:SS (12/24 hr) | Time Event Recorder | 1.8V ~ 5.5V | |
Suntsu Electronics, Inc.
|
Send RFQ |
Price on request
Price and Stock
on Request |
3µA | YY-MM-DD-dd | Alarm, Leap Year, RAM | I²C | - | Surface Mount | -40°C ~ 85°C | 10-SMD | HH:MM:SS | Clock/Calendar | 1.6V ~ 3V | |
|
Renesas
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
Suntsu Electronics, Inc.
|
Send RFQ |
Price on request
Price and Stock
on Request |
500nA @ 3V | YY-MM-DD | Alarm, Leap Year, RAM | I²C | - | Surface Mount | -40°C ~ 85°C | 10-SMD | HH:MM:SS | Clock/Calendar | 1.6V ~ 5V | |
Smart Prototyping
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | YY-MM-DD-dd | Alarm, Leap Year, Square Wave Output, Watchdog Timer | I²C | - | Through Hole | -40°C ~ 85°C | - | HH:MM:SS (12/24 hr) | Clock/Calendar | 3.3V | |
Texas Instruments
|
Send RFQ |
Price on request
Price and Stock
on Request |
1.5mA (Typ) @ 4.5 V ~ 5.5 V | YY-MM-DD-dd | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | Parallel | - | Surface Mount | 0°C ~ 70°C | 28-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.3V ~ 4V | |
Simtek
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
BenchPro
|
Send RFQ |
Price on request
Price and Stock
on Request |
1.5mA (Typ) @ 4.5 V ~ 5.5 V | YY-MM-DD-dd | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer | Parallel | - | Surface Mount | 0°C ~ 70°C | 28-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.4V ~ 4V | |
|
Analog Devices / Maxim Integrated
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
5µA ~ 10µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Rochester Electronics
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | - | - | - | - | - | - | - | - | - | - | |
|
Rochester Electronics
|
Send RFQ |
Price on request
Price and Stock
on Request |
20µA @ 5V | YY-MM-DD-dd | Alarm | - | - | - | -40°C ~ 85°C (TA) | - | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 2.8V ~ 3.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1µA ~ 2µA @ 3V ~ 5V | YY-MM-DD-dd | Alarm, Leap Year | 3-Wire Serial | - | Surface Mount | -40°C ~ 85°C | 14-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 1.6V ~ 5.5V | |
NXP Semiconductors
|
Send RFQ
|
Price on request
Price and Stock
on Request |
10µA ~ 50µA @ 1V ~ 5V | YY-MM-DD | Alarm, NVSRAM, Square Wave Output | I²C, 2-Wire Serial | 240B | Through Hole | -40°C ~ 85°C | 8-DIP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 2.5V ~ 6V | |
NXP Semiconductors
|
Send RFQ |
Price on request
Price and Stock
on Request |
8µA ~ 15µA @ 2V ~ 5V | YY-MM-DD-dd | Alarm, NVSRAM | I²C, 2-Wire Serial | 8B | Through Hole | -40°C ~ 85°C | 8-DIP | HH:MM:SS:hh (12/24 hr) | Clock/Calendar | 2.5V ~ 6V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
1.8µA ~ 3µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | Parallel | - | Through Hole | -40°C ~ 85°C | 18-DIP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 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-SOIC | HH:MM:SS (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
5µA ~ 10µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | Parallel | - | Through Hole | -10°C ~ 70°C | 18-DIP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
5µA ~ 10µA @ 2V ~ 5V | YY-MM-DD-dd | Leap Year | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
|
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | YY-MM-DD-dd | Alarm | Parallel | - | Surface Mount | -40°C ~ 85°C | 24-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
- | YY-MM-DD-dd | Alarm | Parallel | - | Through Hole | -40°C ~ 85°C | 18-DIP | HH:MM:SS (12/24 hr) | Clock/Calendar | 4.5V ~ 5.5V | |
|
Epson
|
Send RFQ |
Price on request
Price and Stock
on Request |
3µA @ 5V | YY-MM-DD-dd | Leap Year, SRAM | 4-Wire Serial | 120b | Surface Mount | -30°C ~ 70°C | 14-SOP | HH:MM:SS (12/24 hr) | Clock/Calendar | 2.7V ~ 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 | 18-SOP | HH:MM:SS (24 hr) | Clock/Calendar | 2.5V ~ 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 (12/24 hr) | Clock/Calendar | 1.8V ~ 5.5V |
Showing 1451-1500 of 2,387 products