74LS154 4 Line to 16 Line Decoder Demultiplexer IC

The 74HC154 designed as a 4-to-16 line decoder/demultiplexer.  It converts sixteen mutually exclusive outputs (Y0 to Y15) from four binary weighted address inputs (A0 to A3). TTL circuitry is used in each of these 4-to-16-line decoders. When both the strobe inputs, G1 and G2, are LOW, this circuit decodes four binary-coded inputs into one of sixteen mutually exclusive outputs. The demultiplexing function is carried out by addressing the output line with the four input lines.

As a result, data from one of the strobe inputs is passed to the other strobe input, which is set to LOW. All outputs are HIGH when either strobe input is HIGH. These demultiplexers are ideal for building memory decoders with high performance. To minimise transmission-line impacts and simplify system design, all inputs are buffered and input clamping diodes are provided. Clamp diodes are used as inputs. As a result, these current limiting resistors permits to be used to interface inputs to voltages greater than VCC.

A demultiplexer designed as a combinational logic circuit that switches a single common input line to one of numerous distinct output lines. The data distributor, often known as a Demultiplexer or “Demux,” is a device that distributes data. In a nutshell, this is the polar opposite of the Multiplexer from the last tutorial. The demultiplexer takes a single input data line and switches it one at a time to any of a number of distinct output lines. A serial data signal is fed into the demultiplexer, which converts it to parallel data on the output lines.