JEDEC PUBLICATION 95 PAGE 4.21-4/A 4.21-3 CONCEPT This design guide defines the symbology,algorithms,dimensions and tolerances for ISM LGA packages with external bond fingers.The guidelines are based on metric dimensions and adhere to the geometric dimensioning and tolerancing principles defined in ASME Y14.5M-1994. 4.21-4 RECOMMENDED PACKAGE OUTLINE Refer to Table 4.21-1 and Figures 4.21-3 though 4.21-5 for the recommended symbology and outline format for ISM LGA packages. 4.21-5 RECOMMENDED VALUES AND TOLERANCES The following table defines the symbology and recommended algorithms,dimensions and tolerances that shall be used when preparing an ISM LGA package outline.JEDEC PUBLICATION 95 PAGE 4.21-4/A 4.21-3 CONCEPT This design guide defines the symbology, algorithms, dimensions and tolerances for ISM LGA packages with external bond fingers. The guidelines are based on metric dimensions and adhere to the geometric dimensioning and tolerancing principles defined in ASME Y14.5M-1994. 4.21-4 RECOMMENDED PACKAGE OUTLINE Refer to Table 4.21-1 and Figures 4.21-3 though 4.21-5 for the recommended symbology and outline format for ISM LGA packages. 4.21-5 RECOMMENDED VALUES AND TOLERANCES The following table defines the symbology and recommended algorithms, dimensions and tolerances that shall be used when preparing an ISM LGA package outline