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百度了一下找到了答案,谢谢"白山黑水",以下是从"白山黑水"新浪博客复制过来的,给有同样需要的人.
/ c: ]$ D, ^& b+ YI'm looking for description about these libraries which category of component each library! s* A4 k O6 l( a+ {5 V% `( s+ R
covers or any other specifics, and what begining letter stands for.# X* M* O8 X3 v
5 Z/ |) q8 c/ K7 p Z* K3 B
In LP Viewer found PLB library files:
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1 d5 C: a2 F1 O- s; OPCBM-STARTER.PLB09
6 W1 z i+ X3 R3 T' [( Y" DBGA7351B.PLB09 N% F7 b" e3 I" U1 t( O. \
SMN7351B.PLB09) \1 Q% J% y( i2 `& X
SMM7351B.PLB09' L; V0 w' k* G) w e! L/ X8 b5 b4 U, ]
SML7351B.PLB09! \! L" x8 N3 Z2 ]- K+ P
CNA7251.PLB09" }0 w* i3 q; y4 |' G0 U; P
CNB7251.PLB09
& i) u' c2 Y! x. j" {1 K/ MCNC7251.PLB093 }0 a3 W5 K1 V) {: I% x
CNP7251.PLB09. J1 H0 R- `* Z) P3 ^& ]( Z
THA7251.PLB09
, {. ]9 Q6 j9 E [THB7251.PLB09( A( \9 L; l4 c( J
THC7251.PLB09+ t* {5 [, A1 f9 @
THP7251.PLB09( q1 q3 B* G( v g+ S- F% C, ~2 j ?
2 S9 ]' T0 s2 O: r J1 Q" n2 `
$ \. Z2 S; K2 eAnswer
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* v7 `. E% w U, D- y/ fPCBM-STARTER = BGA & SMN combined with Mfr data added.
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" x1 r8 x: L! ?" W) C. c0 m4 oCN = Connectors' Z& `6 l/ Z; f' S" y
! C8 R! F; }: B8 d2 \ N4 H
TH = Through-hole/ _* e7 `9 N+ O1 ^. ]
3 Q3 {. t% i. {6 b+ q
SM = Surface Mount" f8 [* ^3 V8 j1 z) @
( A; h; Z, R+ U7 t, Q+ A/ m8 EA = Most Annular Ring for Through-hole8 v/ Z5 n5 b3 D/ {+ R) V
B = Nominal Annular Ring for Through-hole! \" p4 z& O1 {+ Y- [- k1 w* }
C = Least Annular Ring for Through-hole
+ d4 a# C9 b0 {& J7 iP = Proportional (The Annular Ring grows larger as the hole gets bigger for Through-hole)
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) e( a* l; D: r& ~; }7 tSML = Least SMT Pad! u- i. ^3 y7 v0 i; D
SMN = Nominal SMT Pad" a) p% t2 f7 K% l- L7 p
SMM = Most SMT Pad& q7 C+ P4 b: v
4 D. w3 C* ^# b- ]3 A1 }/ o2 ^( e
BGA only comes in "Nominal" format
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这里的Most ,Nominal , Least说的是封装在制作时的一个思维标准。Most 用于密度小的板子（pad 尺寸最大），Nominal用于密度适中的（pad尺寸中等），Least适用于密度大板子（pad尺寸最小）。 |
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发表于 2012-5-26 09:08
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支持！
反对！
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