QFN芯片三维视图PCB封装库CAD Cadence AD库（Step后缀3D模型库）： MLF24.PNG MLF24.STEP MLF32.PNG MLF32.STEP MLF40 6x6.PNG MLF40 6x6.STEP QFN16 3x3.PNG QFN16 3x3.STEP QFN16 4x4.PNG QFN16 4x4.STEP QFN16 5x5.PNG QFN16 5x5.STEP QFN36 6x6.PNG QFN36 6x6.STEP QFN40 6X6.PNG QFN40 6X6.STEP QFN40-6x6.PNG QFN40-6x6.STEP QFN48 7x7.PNG QFN48 7x7.STEP QFN56 8x8.PNG QFN56 8x8.STEP