Monostable multivibrators are not a brand but a type of electronic circuit used in pulse generation and timing applications. They are commonly utilized in industrial automation, electronics, and control systems. Companies like Texas Instruments (USA), ON Semiconductor (USA), and NXP Semiconductors (Netherlands) produce such components, which are essential for signal processing, delay generation, and sequential logic circuits. These devices are widely available through industrial suppliers like Radwell and Grainger, catering to sectors such as manufacturing, telecommunications, and robotics.