高速PCB设计指南之二5483774987

PCB(HD)1))()()()()IEC()(:mm)-0.60.40.2-0.00.00.0-0.10.00.00.50.250.050.50.050.05IEC-0.80.50.2-0.50.350.2-0.050.050.030.50.250.050.50.050.05L(0.625mm)(:mm)J(:mm)-0.20.20.2-0.80.60.4-0.10.050.01.50.80.20.50.050.05MELF(:mm)-1.00.40.2-0.20.10.0-0.20.10.00.20.250.250.50.050.05(:mm)-0.20.10-0.20.10-0.20.100.250.10.050.50.050.05L(:mm)-0.10.10.0-1.00.50.2-0.10.10.10.50.250.050.50.050.052BGACAP?quot;3BGA()()()4()*5BGA(mm)-0.050.250.300.350.25-0.300.650.250.300.350.25-0.300.650.350.400.450.35-0.400.800.250.300.350.25-0.300.800.350.400.450.35-0.400.800.450.500.550.40-0.501.000.550.600.650.50-0.601.270.700.750.800.60-0.701.500.700.750.800.60-0.70()6()7(,)()()()89()10sldermask)()()()33123I/OIC4IMP809IMP706IMP813X25043X2504556ICIC-10100uF100uF0.01uF410110uF500kHz20MHz10.5uAROMRAMVccGNDPCBPCBPCBPCB/ICPCBPCBd20001PCBEMCCADPCB//PCBPCBS-VCCS-VEEVEE-VCC1MOSIOL=IOH,TTLIOLIOH./ZO()10ECL50TTL100HC(T)2001ZOZO11IC2IC32Cdec..0.50.61H/m0.4-0.5H/m.4050PCB11TTLVccSVEES1.5mm/ICICdi/dtIC25I=cdV/dt2Cdec.4PCBPCBIC100-100Pf,LF-IC[1/(.r)],rICVEEVCCICLtrace1MHzQ2VccIC1MHz21MHz*1HzZ1=6.28Rs=3.14Q2Rp=12.56Z0ICZ0=Ltrace/Cdecoupling1HIC325Ltrace.2IC313ICLchoke+Cdec.r3ns350mm50hH50pF3.2nsICICIC3EDILSOEMPCB3=1/.r=1/.rI(f)=2.I.r/TI=T=rH5=PCBn30MHz60300mPCBDILPCBPCBPCBPCB10kHz10kHz1MHz8010Nh/m1MHz//