The JEDEC Standard 8-A for LV interface levels. The JEDEC Standard 8-A for LV interface levels is described in the image shown below for 3V3 and 5V logic families: Reducing the power supply voltage yields an exponential decrease in power consumption.Ī standard exists for defining the voltage levels of input and output voltages for every power supply voltage level this standard was developed by The Joint Electron Device Engineering Council (JEDEC) it is the JEDEC Standard 8-A for LV interface levels. For over 30 years, powering electronic circuits and devices using a 5V level was common practice today, most electronic circuits and devices use a 3V3 power supply voltage level, some are even migrating to a 2V5 level (or even to lower voltages!). So, why is the 3.3V a standard power supply voltage level? Because power consumption has always been a concern for designers, lower power supply voltage levels were introduced to make more power-efficient circuits and devices. This guide will show you why 3V3 is the current standard voltage level for power supplies in electronic circuits and devices and some general tips when designing and handling these voltage levels in your circuits or devices powered by Arduino. Although there is only a 1V7 difference between both voltages, it is enough to provide a significant difference in power efficiency. The voltage of the power supply is usually determined either by convenience or the need for power efficiency that the electronic circuit or device itself has as a requirement.ģV3 and 5V are standard voltage levels nowadays in power supplies. When designed, most electronic circuits and devices must choose a power supply.
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