C, N : Denote Collapsing and Non-collapsing balls respectively when specifying a BGA land pattern.For example, 0.80 mm by 1.50 mm is denoted 80X150 H = Height for vertically mounted components.D = Body Diameter for round component body.W = Maximum Lead Width (or Component Lead Diameter).For example, P80 specifies a 0.80 mm pitch between terminations. Specific characters are reserved for use in the naming convention to denote or separate certain fields: Thermal Tabs are included in the Pin Quantity.Pitch Values are two places to the right & left of decimal point with no leading Zeros but include trailing zeros.All Chip Component Body Sizes are one place to each side of the decimal point.All numeric values are two places before and after the decimal point and “remove” leading Zeros.If there is no pin quantity in the Land Pattern Name it is assumed that the pin quantity is 2.All dimensions are nominal except height is maximum.The first 3 – 7 characters in the land pattern name describe the component family.
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