The SN74HCT139DR is a high-performance, dual 2-line to 4-line decoder/demultiplexer integrated circuit (IC) manufactured by Texas Instruments, a renowned American technology company known for designing and manufacturing semiconductors and various integrated circuits.

• Technology: Schottky TTL (Transistor-Transistor Logic)
• Voltage Range: 4.5 to 5.5 volts
• Inputs: Two binary weighted inputs (A0 and A1)
• Outputs: Four mutually exclusive active low outputs (O0 to O3)
• Enable Input: Active low (E)
• Noise Immunity: High
• Operating Temperature: -40°C to 85°C
• Package: SOIC (Small Outline Integrated Circuit)
• Compliance: RoHS (Restriction of Hazardous Substances)