| 摘要 |
PURPOSE:To scale down the size on mounting of a complicate electronic circuit, and to improve operational reliability by arranging peripheral units around a central unit and connecting corresponding mutual connecting pads in a package. CONSTITUTION:A substrate for a central unit 10 is formed to a square, pads 10a for connection to input lines are disposed along one side of the square, and pads 10b for connection are each arranged along other three sides. Peripheral units 21-23 have the same constitution, substrates for the units 21-23 are shaped to a rectangle, pads 22b for mutual connection and pads 22c for connecting output lines are separated and disposed mutually in the unit 22, and a long side on which the pads 22b are arranged is disposed into a package 50 so as to be oppositely faced to each side for mutual connection in the unit 10 at slight intervals. The pads for mutual connection are connected one another by short bonding wires.
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