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RTC

PCF8563 RTC IC
PCF8563 RTC IC

PCF8563: Real-Time Clock/Calendar IC

The PCF8563 RTC integrated circuit, is designed with low power consumption and a wide operating voltage range in mind.
New Essential Analog Precision Measurement ICs from Maxim Integrated
New Essential Analog Precision Measurement ICs from Maxim Integrated

New Analog Products offers robust protection, high accuracy and increased battery life in IoT, Industrial, and Healthcare Applications

Designers can now achieve double the battery life together with robust protection and highest accuracy for the internet of things (IoT), industrial and healthcare applications with three new Essential Analog ICs from Max
nanoPower Real-Time Clock Offers Smaller Package and Longest Battery Life
nanoPower Real-Time Clock Offers Smaller Package and Longest Battery Life

MAX31341B - nanoPower RTC in Small Package with Long Battery Life

 
DS1307 RTC IC
DS1307 RTC IC

DS1307 I2C Real Time Clock (RTC)

The DS1307 is a low power Full Binary (BCD) Real Time Clock (RTC) IC with 56 bytes of SVRAM that communicates through I2C Protocol. The IC can work from directly supply on Vcc and switch to Battery automatically when required.  
DS1302 RTC IC
DS1302 RTC IC

DS1302 RTC Chip

DS1302 Pin Configuration Pin No. Pin Name Description 1 Vcc2
DS3231 RTC Module
DS3231 RTC Module

DS3231 RTC Module

RTC means Real Time Clock. RTC modules are simply TIME and DATE remembering systems which have battery setup which in the absence of external power keeps the module running. This keeps the TIME and DATE up to date.