The M63830FP/P is transistor-array of high active level four units type which can do direct drive of 3 voltage microcomputer series. A resistor of 3.5k is connected between the input and the base of PNP transistors. A clamp diode for inductive load transient suppression is connected for the output pin (collector) and COM pin. The input diode is intended to prevent the flow of current from the input to the Vcc. Without this diode, the current flows from "H" input to the Vcc and the "L" input circuit is activated, in such a case where one of the inputs of the 4 circuit is "H" and the other are "L" to save power consumption. The diode is inserted to prevent such mis-operation. The outputs are capable of driving 1.5A and are rated for operation with output voltage up to 50V.