KiCad Libraries
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Source at commit a8d0c40d7f9d634d0d266186399c4fe78826bc49 created 12 years 7 months ago. By Werner Almesberger, Moved sot-323.fpd from ben-wpan to kicad-libs (incoming) | |
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1 | # |
2 | # Tags: |
3 | # |
4 | # F Footprint name (must be first) |
5 | # N Data sheet identifier (N tag of BOOKSHELF; can be omitted if equal to F) |
6 | # |
7 | |
8 | # Standard rectangular passive components |
9 | F: stdpass |
10 | |
11 | # Solder pads and test points |
12 | F: pads |
13 | |
14 | # Printed 8:10 card contacs |
15 | F: 8_10-card |
16 | |
17 | # Fiducial (1 mm copper pad, 2 mm solder mask clearance) |
18 | F: fiducial |
19 | |
20 | # "Generic" simple QFN |
21 | F: qfn |
22 | # |
23 | # The information for these packages comes from various sources: |
24 | # |
25 | # - the C8051F326 data sheet, for the QFN28 footprint (N: mcu) |
26 | # - the AT86F326 data sheet, for the QFN32 package dimensions (N: txrx) |
27 | # - Atmel's general recommendations for QFN land patterns (N: atmel-qfn) |
28 | # - NXP's SOT617-1 and SOT617-3, for package and land pattern: |
29 | # http://www.nxp.com/package/SOT617-1.html |
30 | # http://www.nxp.com/package/SOT617-3.html |
31 | # |
32 | # Solder paste: |
33 | # |
34 | # Footprint Center pad Closest NXP (with complete land pattern) |
35 | # QFN28-Atmel 2.4 mm for further study |
36 | # QFN28-SiLabs 3.3 mm use SiLab's specification |
37 | # QFN32-VHHD-2 3.7 mm between SOT818-1 and SOT788-1 |
38 | # QFN32-VHHD-6 3.4 mm SOT818-1 |
39 | # |
40 | # From NXP: |
41 | # |
42 | # Package Pad Paste zone Islands Isl. size Isl. gap |
43 | # SiLabs 3.25 3.1 3 x 3 0.9 |
44 | # SOT818-1 3.4 1.75 2 x 2 0.75 0.25 |
45 | # SOT788-1 4.0 2.4 3 x 3 0.6 0.3 |
46 | # |
47 | # NXP rules (AN10365): |
48 | # - paste zone = 35% of pad area |
49 | # - paste coverge = 20% of pad area |
50 | # |
51 | # Our parameters: |
52 | # |
53 | # Package Pad Paste zone Islands Isl. size Isl. gap Zone Coverage |
54 | # QFN32-VHHD-2 3.7 2.15 3 x 3 0.55 0.25 34% 20% |
55 | # QFN32-VHHD-6 3.4 1.95 2 x 2 0.75 0.45 33% 19% |
56 | # |
57 | # Known bugs: |
58 | # |
59 | # - really ought to merge all the various QFN definitions (we have more |
60 | # over at gta02-core) into a single QFN file with a big mean table of |
61 | # everything |
62 | # |
63 | N: sot617-3-lp |
64 | |
65 | # "Generic" simple QFP (for now, just for Silabs' C8051F320) |
66 | F: qfp |
67 | |
68 | # Mini-USB B receptable (SMT; almost generic) |
69 | F: mini_usb_b |
70 | |
71 | # USB A plug for SMT |
72 | # |
73 | # Note: the signal pads are enlarged by 0.2 mm and their center is shifted by |
74 | # 0.1 mm with respect to the reference. |
75 | # |
76 | # According to the data sheet, the leads terminate at (2.00+/-0.10 mm)/2+ |
77 | # 2.48 mm = 3.48+/-0.10 mm from the center. The reference footprint puts the |
78 | # edge of the pads at (2.00+/-0.10 mm)/2+2.6 mm = 3.6 mm+/-0.10 mm, so the |
79 | # maximum lead end could be at 3.58 mm while the minimum pad edge could be at |
80 | # 3.5 mm. |
81 | # |
82 | # Assuming that the pad is intended to extend a bit beyond the lead, we need |
83 | # to add 0.2 mm to compensate for these tolerances. (The pad tolerance may not |
84 | # be intended to be used this way, however, we still have to consider small |
85 | # errors in registration, which also amount to about 0.1 mm, so the calculation |
86 | # remains valid.) |
87 | # |
88 | F: usb_a_plug_smt |
89 | |
90 | # USB 2.0 from usb_20_040908, page 99 |
91 | F: usb-a-pcb |
92 | |
93 | # SOT-323 package with counter-clockweise or clockwise pin assignment |
94 | F: sot-323 |
95 | N: mmst3904 |
96 |
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