4 Board outline The board shall be 101.5 mm x 114.5 mm +/- 0.25 mm in size for packages less than or equal to 40 mm on a side (see figure 2). A typical edge connector is depicted in figure 2. The edge connector can be pin- out and pitch modified for specific needs. Multiple rows of vias along the edge connector are allowed.For various package sizes, refer to table 1 for the appropriate PCB size.Table 1 — PCB sizes for packagesPackage Length PCB Size (+/- 0.25 mm)Pkg. Length 40 mm 101.5 mm x 114.5 mm (4.0" x 4.5")40 mm < Pkg. Length 65 mm 127.0 mm x 139.5 mm (5.0” x 5.5”)65 mm < Pkg. Length 90 mm 152.5 mm x 165.0 mm (6.0” x 6.5”)Figure 2 — Example test board outer dimensions and edge connector design. JEDEC Standard No. 51-10 Page 45 Trace design 5.1 Top trace layer layout (both 1s and 2s2p PCBs)Traces should be laid out such that the test device will be centered relative to a 101.5 mm x 101.5 mm section towards the top of the board (away from the edge connector) for the smallest board. For larger board sizes, locate the package at the top of the board in the center of a square whose length is the width dimension of the board. The package shall be oriented such that the long dimension of the package body is perpendicular to the edge connector. The traces connecting to the package must extend at least 25 mm out from the edge of the device body. Trace lengths longer than this are allowed. Traces must be routed in a radial fashion (flared) to meet the edges of a rectangle such that the terminal via locations are equally spaced over 90% of the perimeter of the sides of this rectangle. Traces must be flared out to the 25 mm perimeter adjacent to the side of the package on which they originate. Figure 3— Traces flared to perimeter 25 mm from package bodyA single PCB design can be used for a family of packages with the same pin pitch as long as the traces are fanned out to meet the requirements for the largest body size (see figure 4).For packages with a single row of leads, the odd numbered pins should be fanned out to one side of the pattern and the even numbered pins should fan out to the opposing side (see figure 5) JEDEC Standard No. 51-10Page 55 Trace design (cont’d)5.1 Top trace layer layout (both 1s and 2s2p PCBs) (cont’d) Figure 4 — Nested design with traces flared to perimeter 25 mm from from largest package body.Figure 5 — Traces flared to perimeter 25 mm from SIP body.