Multi-layer PCB with By-pass Capacitor Grid

All phyCORE® boards have a 6 to 12-layer PCB, with 

• at least two dedicated layers for Ground

• at least one Vcc layer and 

• at least three signal routing layers

Moreover, the top and bottom signal-routing layers of the PCB feature a by-pass capacitor grid in which 1 nF and 100 nF capacitors are arranged in a checkerboard fashion, thus driving all noise and other impedance to GND in order to minimize EMI.

Implementing a modular phyCORE Single Board Computer subassembly in your target application offers the benefit of economical use of multi-layered PCBs. In most cases target circuitry supports only interface and passive components, and therefore require minimal layers. To contrast, phyCORE subassemblies provide a drop-in microcontroller circuitry that is augmented by external Flash and RAM memory devices, as well as secondary Ethernet and CAN controllers. Such active logic circuitry requires multi-layered PCBs for optimal electrical and thermal operation. Use a phyCORE subassembly and forgo the need for multi-layered target circuitry.