The SN74LS156D is a dual 2-line to 4-line decoder/demultiplexer IC part. It features a 16-pin dual in-line package (DIP) with two separate decoders in one package. Each decoder has two input lines and four output lines, allowing for the selection of one of four possible outputs based on the input signals. The SN74LS156D operates on a supply voltage range of 4.75V to 5.25V and has low power consumption. It is compatible with TTL logic levels and has high noise immunity, making it suitable for use in various digital logic applications. Additionally, the IC has a wide operating temperature range and is RoHS compliant, ensuring its environmental sustainability