Abstract: The invention relates to a data bus connector or a connector for another complex high-speed electronic application. In accordance with the invention, the connector comprises a plurality of substrates (4, 5, 6) which are arranged at a plurality of mutually substantially parallel levels. Active circuits (10) are mounted on the substrates (4, 5, 6) and are connected between input pins (2) to be connected to an external connector and pins (1) which are to be soldered to a printed circuit card (28). The connector pins (2) are straight and secured flat against the edge of the substrates (4, 5, 6) carrying the active circuits (10); the spacing between two substrates thus corresponds to that between two rows of pins. The pins (1) to be soldered extend perpendicularly to the pins (2) of the connector and are also secured to the substrates.