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LM393 LM393 is a IC with a dual comparator in a single IC package. The dual independent voltage comparator in this IC is capable of single or split supply operation. LM393 has the input voltage range of 2V – 36V. The dual comparator feature of this IC enhances high gain and wide bandwidth characteristics. LM393 has an input offset voltage of 2mV. This IC can be used in voltage comparator circuits, electronic oscillator, and timer circuit