Clock & Timing
Clock and timing ICs provide systems with accurate time, delay and synchronization. Precise timekeeping and event scheduling rely on these components.
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Real-time clocks (RTC), timer ICs (555), clock distributors and delay lines are the main types. Accuracy, supply voltage, interface (I2C) and battery backup matter when choosing one. Timestamping, alarms, PWM generation and synchronization are the most common applications.
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Frequently asked questions
What does an RTC (real-time clock) do?+
An RTC is an IC that keeps date and time running on a small battery even when power is lost (e.g. DS3231). It is used in data logging, alarms and timestamping applications.
Where is the 555 timer used?+
The 555 IC is a versatile, cheap timer used to generate simple delays, square waves (oscillator) and single pulses (monostable). It is a classic choice for blinking LEDs, generating tones and timing circuits.
Why does RTC accuracy relate to battery and temperature?+
An RTC's timekeeping depends on its internal crystal frequency, which temperature shifts slightly. Temperature-compensated RTCs like the DS3231 keep far more accurate time, while a backup battery preserves the clock during power loss.