SN74LS139AD is a popular IC component that belongs to the SN74LSxx series of integrated circuits. It is specifically a dual 2-to-4 line decoder/demultiplexer with active-low enable. This IC is extensively used in various digital applications where decoding and demultiplexing functions are required. Here is an overview and key features of the SN74LS139AD:
1. Functionality: The SN74LS139AD is designed to perform the function of a decoder and a demultiplexer simultaneously. It has two separate 2-to-4 line decoders within a single chip, making it highly efficient for various digital systems.
2. Input and Output: This IC offers three inputs - A0 (pin 14), A1 (pin 13), and G1 (pin 1). The two address inputs, A1 and A0, allow selection of one of the four outputs based on the combination of inputs. The third input, G1 (G enable), is an active-low enable input that controls the working of the decoder/demultiplexer.
3. Output pins: SN74LS139AD has four active-low output pins (Y0, Y1, Y2, and Y3) denoted by pins 12, 11, 10, and 9, respectively. The outputs correspond to binary representation based on the input combination. Only one of the output pins will be active based on the selected address inputs
