PCB设计者必看资料(非常全面)

2005121956[]PCB...[]0663-6888048···IDEDA[]PCBwanghaiibing[][][][]PCBnahuhsnil14712005-02-241[]PCBPCBPCBPCBPCBLayout()PCBLayout()PCBPCBPCBpcbPCBPCBLAYOUTPCBPCBPCBPCBPCBPCBPROTEL99PROTEL99SEPCBPCB(maihui.top263.net/ebook/pcb_base.rarPCBPCBPCBPCBPCBPCBPCBPCB1PCB120.20.3mm,0.050.07mm,1.22.5mmPCB,()3,2PCBPCBPCBPCBPCB34heatshieldThermal5CAD0.1(2.54mm),0.1(2.54mm)0.10.050.0250.026DRC12PCB345PCB67PCB8***********************************************************************************************PCBPCBPCB,--PCB--PCB***********************************************************************************************PCB100MHZ50MHZ100MHZ50%50MHz20%120MHz50MHz120MHzPCB45MHZ~50MHZ1/21/21/2PCB()PCB0.167ns.0.2nsGaAs7.62mmTrTpdTr4Tpd2TpdTr4TpdTr2TpdPCB0.25-0.55ohms/footPCBZo/·Reflectedsignals·Delay&Timingerrors·FalseSwitching·Overshoot/Undershoot·InducedNoise(orcrosstalk)·EMIradiation5.1()EMI5.25.35.45.5PCB5.6EMI(Electro-MagneticInterference)EMIEMIEMIEMI6.1PCBCMOSTTL10MHz750MHz1.575MHz1GaAs0.36.2PCB(DaisyChain)(Star)100%StubDelay=Trt*0.1.TTL1.5PCBCADRCRCRCTTL(ACT,HCT,FAST)SMDSMDPCB6.3PCB(EMC)PCBBuild-upPCBPCBPCBPCB6.4()EMIZUKEN(RouteEditor)EMC/EMI(INCASES,Hot-Stage)PCB2005-03-0913:37[]SP100A100nahuhsnil14712005-02-2422PCBPCB(HD)••••••1•))“”“”“”•“”()()()()IEC-0.60.40.2-0.00.00.0-0.10.00.00.50.250.050.50.050.05()(:mm)•IEC-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•“”3BGA“”“”“”(“”)()()4()*“”5“”•BGA(mm)-0.050.250.300.350.25-0.300.650.250.300.350.25-0.300.650.350.400.450.35-0.400.800.250.300.350.25-0.300.800.350.400.450.35-0.400.800.450.500.550.40-0.501.000.550.600.650.50-0.601.270.700.750.800.60-0.701.500.700.750.800.60-0.702005-03-0913:38[]SP100A100nahuhsnil14712005-02-24334PCBLayout()PCBLayout()1.1.1PCBDAA1.21.31.41.51.6DGNDAGND1.71.8/DTEDAA2.2.1a)DAAb)/c)IC2.2DAAPCB(2/1/1)Note:DAA/2.3ConnectorJacka)ConnectorJackb)c)Socket2.4(ModemA/DD/A)a)b)2.5a)DAAb)PCBTXA1TXA2RINVCVREFc)TXA1TXA2RINVCVREFd)DTEDTEEIA/TIA-232-E/Connector/2.6a)b)IC/0.1uFEMIc)ConnectorISA2.5ind)DTEConnectore)2.70Ohmbead3.3.1ModemModem===============================================================|NoiseSource|neutral|noisesensitive-----------+----------------+----------------+-----------------VDD,GND,AGND||31,38,34,37|-----------+----------------+----------------+-----------------Crystal|52,53||-----------+----------------+----------------+-----------------Reset||35|-----------+----------------+----------------+-----------------MemoryBUS|1-6,9-10,12-13|||43-50,58-68||-----------+----------------+----------------+-----------------NVRAM||39,42|-----------+----------------+----------------+-----------------Telephone||7-8,36,51,54|24-25,30,32-33-----------+----------------+----------------+-----------------Audio|||23,26-29-----------+----------------+----------------+-----------------DTE|40-41|11,14-22,55-57|==============================================================================================================================|NoiseSource|neutral|noisesensitive-----------+----------------+----------------+-----------------VDD,GND,AGND||31,38,34,37|-----------+----------------+----------------+-----------------Crystal|52,53||-----------+----------------+----------------+-----------------Reset||35|-----------+----------------+----------------+-----------------MemoryBUS|1-6,9-10,12-13|||43-50,58-68||-----------+----------------+----------------+-----------------NVRAM||39,42|-----------+----------------+----------------+-----------------Telephone||7-8,36,51,54|24-25,30,32-33-----------+----------------+----------------+-----------------Audio|||23,26-29-----------+----------------+----------------+-----------------|11,14-22,40-41|||55-57||===============================================================3.2()3.3()a)PCB50-100milb)PCB50-100milPCB200mil3.410mil(12-15mil)/HCS/HRD/HWT/RESET3.510mil(12-15mil)MICMMICVSPKVVCVREFTXA1TXA2RXATELINTELOUT3.65mil(10mil)()3.7IC25mil3.8(/)()PCB3.990453.103.113.123.13DAA()60mil3.14[]--------------------------------------------------------------------------------PCBLayout()PCBLayout()4.4.14.210uF0.1uF/.PCB4.3200mil()4.45.5.1(DAA):ModemDGNDAGND;5.2(DAA)ModemDGNDAGND;5.3EMIEMI(Bead/);5.4(SRAMEPROMModem)DAA//5.5DTE5.6BeadEMI5.725-50mil5.8IC/6.6.1/(XTLIXTLO)CrystalXTLO45(XTLO)6.2DGND6.36.4XTLO/100Ohm6.5ModemGNDModemGND7.EIA/TIA-232Modem7.1EMI7.2Choke7.3EIA/TIA-232Connector7.4EIA/TIA-232//7.5EIA/TIA-2327.6EIA/TIA-232Modem;;Bead;EIA/TIA-232Modem8.VCVREF8.110uFVC0.1uFVCModemVC(PIN24)8.210uFVC0.1uFVCBeadModemAGND(PIN34)8.310uFVREF0.1uFVCModemVREF(PIN25)8.410uFVREF0.1uFVCModemVC(PIN24)8.1VREF------+--------+10u0.1uVC------+--------+10u0.1u+--------+-----~~~~~---+AGNDBead100MHz=70W;;=200mA;;=0.5W9.Handset9.1TipRingChoke9.2Choke/EMI9.3TipRing(0.001uF/1KV)2005-03-0913:39[]SP100A100nahuhsn