关于新版PADS系统自带库的问题.

wwdzaefd

今天安装了pads9.4.1发现系统自带了不少7251 7351元器件库,但是发现
CNA7251,CNB7251,CNC7251,CNP7251,,,
: w0 u4 v* F/ L- o( C& C! ~4 O0 Y  THA7351,THB7351,THC7351,THP7351,,,
) d: L# p# N3 `+ `; @2 N不知道这些A,B,C,P代表什么意思,
知道的大侠指点下吧!

wwdzaefd

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.
0 I/ \) V: |+ u  w' Q: D6 PI'm looking for description about these libraries which category of component each library
covers or any other specifics, and what begining letter stands for.

In LP Viewer found PLB library files:
; N2 o7 s0 {( ?. h
$ G+ Y# h; z' @5 \PCBM-STARTER.PLB09
% [; O# H6 I  G  {# f! qBGA7351B.PLB09
SMN7351B.PLB09
" K/ ^- a, S8 LSMM7351B.PLB09
9 p( L; V! W: B* {SML7351B.PLB09
CNA7251.PLB09
/ J- ^" l6 K4 Z4 V' Z% tCNB7251.PLB09
- w  G" A/ h4 H  q6 [) n) t9 E9 ACNC7251.PLB09
CNP7251.PLB09
+ E7 Q" m4 r' m5 f+ N% E0 ETHA7251.PLB09
THB7251.PLB09
THC7251.PLB09
THP7251.PLB09
7 Z* n; J9 K: r* l9 s+ j( ~. [3 {

5 f, i. v& q# e' }" d) SAnswer
1 ^6 J+ Z4 a' s$ B3 i& x2 o; j, ~' V
PCBM-STARTER = BGA & SMN combined with Mfr data added.
% ^. L' Y. F* u7 p7 i, _
) z, Q2 Q: l$ D. c7 z, tCN = Connectors

TH = Through-hole
- d3 C+ l( R0 R* u5 b2 i
SM = Surface Mount

, [( ^+ P  o& HA = Most Annular Ring for Through-hole
% d4 w' F5 N5 F/ SB = Nominal Annular Ring for Through-hole
8 l" z; o% D  K- {6 VC = Least Annular Ring for Through-hole
P = Proportional (The Annular Ring grows larger as the hole gets bigger for Through-hole)
3 s$ ?# c+ Z! v5 I
0 A1 G0 W. [6 w  `5 mSML = Least SMT Pad
2 y" ]! f; L6 r9 Z* ~SMN = Nominal SMT Pad
SMM = Most SMT Pad

! D. E: L. `, OBGA only comes in "Nominal" format

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）。