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AT89C51ED2-RDTUM 数据表(PDF) 130 Page - ATMEL Corporation |
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AT89C51ED2-RDTUM 数据表(HTML) 130 Page - ATMEL Corporation |
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130 / 137 page  130 4235K–8051–05/08 AT89C51RD2/ED2 STANDARD NOTES FOR PQFP / VQFP / TQFP / DQFP 1/ CONTROLLING DIMENSIONS : INCHES 2/ ALL DIMENSIONING AND TOLERANCING CONFORM TO ANSI Y 14.5M - 1982. 3/ "D1 AND E1" DIMENSIONS DO NOT INCLUDE MOLD PROTUSIONS. MOLD PROTUSIONS SHALL NOT EXCEED 0.25 mm (0.010 INCH). THE TOP PACKAGE BODY SIZE MAY BE SMALLER THAN THE BOTTOM PACKAGE BODY SIZE BY AS MUCH AS 0.15 mm. 4/ DATUM PLANE "H" LOCATED AT MOLD PARTING LINE AND COINCIDENT WITH LEAD, WHERE LEAD EXITS PLASTIC BODY AT BOTTOM OF PARTING LINE. 5/ DATUM "A" AND "D" TO BE DETERMINED AT DATUM PLANE H. 6/ DIMENSION " f " DOES NOT INCLUDE DAMBAR PROTUSION ALLOWABLE DAMBAR PROTUSION SHALL BE 0.08mm/.003" TOTAL IN EXCESS OF THE " f " DIMENSION AT MAXIMUM MATERIAL CONDITION . DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. |
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