QFN-28-EP(5x5) · 29P预览实物照片3D CADPinoutFootprint尺寸CP2102N-A02-GQFN28RSILICON LABS·QFN-28-EP(5x5)READY29P5.0×5.0×0.75mmP=0.5mm标准电子与连接器元件