IC Power Supply Pin
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Almost all integrated circuits (ICs) have at least two pins that connect to the power rails of the circuit in which they are installed. These are known as the power-supply pins. However, the labeling of the pins varies by IC family and manufacturer. The simplest labels are V+ and V−, but internal design and historical traditions have led to a variety of other labels being used. V+ and V− may also refer to the non-inverting (+) and inverting (−) voltage inputs of ICs like op amps. |
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For power-supplies sometimes one of the supply rails will be referred to as ground (abbreviated "GND") - positive and negative voltages are relative to the ground. In digital electronics, negative voltages are seldom present, and the ground nearly always is the most negative voltage level. In analog electronics (e.g. an audio power amplifier) the ground can be a voltage level between the most positive and most negative voltage level. |
Sumber : wikipedia.org
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