The SN54LS139AJ is a high-quality, dual 2-line to 4-line decoder/demultiplexer integrated circuit (IC) manufactured by the renowned company, Texas Instruments.

• Functionality: Two independent decoders, each accepting two binary-weighted inputs (A0, A1) and providing four mutually exclusive active LOW outputs (O0–O3).
• Technology: Built on low power Schottky (LS) technology.
• Propagation Delay: Typical propagation delay of 20 ns.
• Operating Voltage Range: Wide operating voltage range of 4.75 V to 5.25 V.
• Operating Temperature Range: Wide operating temperature range of -55°C to 125°C.
• Package: 16-pin ceramic dip package.