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Surface Mounted Printed Wire Board Jumper for Unused Integrated Circuit Input Pins

IP.com Disclosure Number: IPCOM000058112D
Original Publication Date: 1988-Aug-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Bou-Ghannam, A McNeill, AB Troop, WC [+details]

Abstract

This article describes a technique for use on a surface-mounted printed wire board which allows for future usage of unused input pins. Attaching a surface-mounted device (SMD) to a printed wire board (PWB) has many benefits. However, when an unused input pin of a SMD integrated circuit (IC) is connected to either the ground layer or the voltage layer of a multilayer PWB, as shown in Fig. 1, problems can arise when the unused input pin is needed in the future for an engineering change (EC). The current method of terminating unused input pins is to have a via attach to the SMD pad and go straight down (Image Omitted) to the appropriate power plane.