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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPC58EG80C3 датащи(PDF) 117 Page - STMicroelectronics |
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SPC58EG80C3 датащи(HTML) 117 Page - STMicroelectronics |
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117 / 139 page  DS11758 Rev 6 117/139 SPC584Gx, SPC58EGx, SPC58NGx Package information 120 Figure 52. eTQFP144 leadframe pad design Note: number, dimensions and positions of grooves are for reference only. Table 68. eTQFP144 symbol definitions Symbol Definition Notes aaa The tolerance that controls the position of the terminal pattern with respect to Datum A and B. The center of the tolerance zone for each terminal is defined by basic dimension e as related to Datum A and B. For flange-molded packages, this tolerance also applies for basic dimensions D1 and E1. For packages tooled with intentional terminal tip protrusions, aaa does not apply to those protrusions. bbb The bilateral profile tolerance that controls the position of the plastic body sides. The centers of the profile zones are defined by the basic dimensions D and E. — ccc The unilateral tolerance located above the seating plane where in the bottom surface of all terminals must be located. This tolerance is commonly know as the “coplanarity” of the package terminals. ddd The tolerance that controls the position of the terminals to each other. The centers of the profile zones are defined by basic dimension e. This tolerance is normally compounded with tolerance zone defined by “b”. |
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