Visible to Intel only — GUID: hyg1724835853868
Ixiasoft
Visible to Intel only — GUID: hyg1724835853868
Ixiasoft
14. Variable Pitch BGA (VPBGA) Package Design of Agilex™ 3 FPGAs and SoCs
The Variable Pitch BGA (VPBGA) packaging is compatible with Type III PCBs that use the design rules equivalent to 0.8 mm ball pitch and standard plated through hole (PTH) vias. The VPBGA ball pitch is variable and it helps to ease signal routing. For more information, contact your local sales representative.
The VPBGA packages with variable ball pitch helps reduce the package form factor. Despite the smaller package size, the VPBGA packages can provide the same I/O pin count and compatible electrical performance compared to the standard BGA packages.
For B18A VPBGA package, the 0.65 mm ball pitch is only available on the two outer rings of the VPBGA package balls, as shown in the top two rows of Figure (a) in the Example of PCB Trace Routing for B18A Variable Pitch BGA (VPBGA) Package figure. The ball pitch is optimized to allow you to route through one signal trace.
Figure (b) in the Example of PCB Trace Routing for B18A Variable Pitch BGA (VPBGA) Package figure shows a wider ball pitch, up to 1.45 mm, which allows you to route through more signal traces compared to standard grid BGA packages. This helps reduce the number of PCB layers—keeping the board cost low with Type III PCBs.
The variable ball grid pattern on the VPBGA packages eases trace routability, reducing the design complexity, number of PCB layers, and board thickness and size—ultimately, reducing board cost and development time.