74ls47 Circuit Diagram. Watch the video demonstration of working of single digit seven segment display module using 74ls47. Qa qb qc and qd are the inputs to 74ls47 as marked in pcb.
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The relative positive logic output levels as well as conditions required at the auxiliary inputs are shown in the truth tables. See the pin diagram of ic 74ls47 here. 74ls47 is a bcd to 7 segment decoder driver ic.
Circuit diagram is given below.
It accepts a binary coded decimal as input and converts it into a pattern to drive a seven segment for displaying digits 0 to 9. 74ls48 is a bcd to seven segments decoder that is used to display numbers pinout examples applications features datasheet the copyright of this 74ls47 datasheet belongs to fairchild semiconductor and is provided for information only. Binary coded decimal bcd is an encoding in which each digit of a number is represented by its own binary sequence usually of four bits. Qa qb qc and qd are the inputs to 74ls47 as marked in pcb.
