Driving 7-Segment Displays with 74HC164 and 74HC138 Using 51 Microcontroller (Part 1)
74HC138 is a CMOS 3-to-8 line decoder integrated circuit, featuring 3 input pins and 8 output pins, capable of converting 3 bits of binary data into 8 corresponding output signals. The 74HC138 chip operates within a supply voltage range of 2V to 6V, while the 74LS138 chip operates within a supply voltage range of 4.75V … Read more