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4022 591 960 82 Us er Reference Man ual 02.02 FC M Multif lex 6-55 Pr oduc t Ch ang e Ov er ■ Lookin g fr om North t o South, th e fir st l ead y ou “ meet ” i n the l ead group (s) is the le ading l ead. This go es for …
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User Reference Manual 4022 591 96082
6-54 FCM Multiflex 02.02
Lead Group
A lead group is defined as a number of in-line arranged leads with identical
dimensions and identical pitch; see FIGURE 6-21.
FIGURE 6-21 Lead group definition
Leading Lead (first lead)
To determine what lead from a lead group is defined as the first one, the leading
lead, following approach is valid:
■ First find out what is the component’s Nort side, East side etc. (see before);
■ Looking from West to East, the first lead you “meet” in the lead group(s) is the
leading lead. This goes for the North and the South side;
= leadgroup
4022 591 96082 User Reference Manual
02.02 FCM Multiflex 6-55
Product Change Over
■ Looking from North to South, the first lead you “meet” in the lead group(s) is
the leading lead. This goes for the West and the East side.
FIGURE 6-22 Leading lead determination
6.7.2.3 Package Dimensions Definitions
Depending on the component type, the component’s outline dimensions or its
body dimensions are measured. See table below.
TABLE 6-23
&RPSRQHQWW\SH 0HDVXUHPHQWVLQFOXGH
SHULSKHUDOOHDGV<HV1R
/HQJWK:LGWKRI 60'LQIRILOHV
GHILQH
Symmetric Yes (QFP, SOP, PLCC) Outline Outline
Asymmetric Yes (QFP, SOP, SOT) Body Outline
No (PLCC, SOJ, SOD, R, C) Outline Outline
North
South
West
East
1
1
1
1
1
1
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User Reference Manual 4022 591 96082
6-56 FCM Multiflex 02.02
6.7.3 Large Symmetric Components
6.7.3.1 Package Types
From software FC5.0 on, the FCM Multiflex package type database contains the SMD
info files for large symmetric component types as well. Here, the component
package types PLCC, QFP, SSOP, SOJ, TSOP, TSSOP, SO and VSO are involved.
FIGURE 6-23 gives an example of such an SMD info file.
FIGURE 6-23 Example of a large symmetric component type SMD info file
You can edit these files in the same way you are used to do with the “normal” size
components’ SMD info files, using the [Edit SMD Info] function.