Definitions for "J-Lead"
Keywords:  plcc, bent, underneath, mount, soj
J-shaped leads protruding from the sides of chip carrier packages. Used to surface-mount the package directly onto the printed circuit board. J-leads can also be plugged into a socket which is then mounted onto a PC board. (See PLCC-plastic leaded chip carrier.)
an integrated circuit package lead configuration that in cross-section resembles the letter J.
A lead configuration typically used on plastic chip carrier packages which have leads that are bent underneath the package body. A side view of the formed lead resembles the shape of the letter ‘J’ The PLCC has J-leads on all four sides, and the limiting factors regards lead dimension is the need to form the leads. In consequence, PLCCs typically have a lead spacing of 1.25mm (0.05 in). J-leads made with thinner material, and on closer pitches, are generally only found in the SOJ package, used for memory devices, which has leads only on the two shorter edges. Whilst the J-lead configuration appears to conserve board space, as opposed to the gull-wing design, the high lower limit on lead spacing means that J-lead packages are generally substantially bigger than the gull-wing equivalents
Keywords:  concept, extension, 'wind, up, general
an extension of the general concept of 'wind-up'