The What, Why, When, Where and How of Real-Time Clocks (RTCs)

Abstract: Tiny real-time-clock (RTC) circuits provide low-cost, low-power, and effectivetimekeeping, a simple but critical feature for today’s complex electronic systems. Thefollowing tutorial provides an overview of these circuits by answering some of the mostcommon questions about this often forgotten but very necessary piece of electronictechnology.