increasing number contour design directions, issued either outside Jap
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INSTRUCTIONS FOLLOWED MOUNTING Permissible error margin lead center position (Abstract from EIAJ standard ED-7404)
increasing number contour design directions, issued either outside Japan, indicate permissible error margin lead center position (reference code: with geometric tolerance plus additional code. permissible error margin related interval straight line between leads (true geometric position) lead width. permissible error margin lead center position outlined below, along with identification system. Indication system lead center permissible error margin dimensional value that exists alone. indicated shown below.
Maximum-body condition.Indicates that value based limit dimensions where body maximum. Lead center position permissible error margin (tolerance) Position tolerance code.Indicates permissible error margin from true center position. Lead width (indicated with reference dimension dimensional allowance)
Definition "lead center position permissible error margin"
Center line specified, correct position
range space between lines that parallel each other when lead width maximum. distance between lines expressed value from center line specified,correct position.
direction arrows
Fig.19
LEAD CENTER POSITION PERMISSIBLE ERROR MARGIN
Mar.'98
INSTRUCTIONS FOLLOWED MOUNTING
Lead position permissible range packages 0.80 0.35 0.10 value smaller than equal 0.16 When bmax 0.45 permissible range lead position bmax 0.61 (Refer Fig. 20.)
True center position Center position bmax Center position bmin
Center position error bmin
bmax bmin bmin
bmax bmax Lead half width with respect true center position when lead position error larger limit.
Center position error bmax
Fig.20
LEAD POSITION ERROR RIGHT-HAND SIDE
Mar.'98
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