# # Tags: # # F Footprint name (must be first) # N Data sheet identifier (N tag of BOOKSHELF; can be omitted if equal to F) # # TI meandered inverted F antenna F: meander N: AN043 # Mini-USB B receptable (SMT; almost generic) F: mini_usb_b # "Generic" simple QFN F: qfn # # The information for these packages comes from various sources: # # - the C8051F326 data sheet, for the QFN28 footprint (N: mcu) # - the AT86F326 data sheet, for the QFN32 package dimensions (N: txrx) # - Atmel's general recommendations for QFN land patterns (N: atmel-qfn) # - NXP's SOT617-1 and SOT617-3, for package and land pattern: # http://www.nxp.com/package/SOT617-1.html # http://www.nxp.com/package/SOT617-3.html # # Known bugs: # # - we should distribute the solder paste in an array of small # squares instead of just covering the whole center pad. # - really ought to merge all the various QFN definitions (we have more # over at gta02-core) into a single QFN file with a big mean table of # everything # N: sot617-3-lp # "Generic" simple QFP (for now, just for Silabs' C8051F320) F: qfp # Common 4-pin crystal SMT package (pins 1 and 4 are on a short side, pin # numbering is counter-clockwise) F: xtal-4 N: nx3225sa # 0805 package with six pads F: 0805-6 # # MMCX board-edge (SMT) female jack # # Design based on Molex 73415-0961, This is also compatible with: # # Tyco 1408152-1 # Emerson 135-3711-801 # Molex 73415-1261 # Amphenol 262107 # # Note: footprint changes with PCB thickness ! # # Known bugs: # - keepout area marker should be on comment layer # - pin 2 should be off-center and extend such that proper trace can be # connected directly # F: mmcx-f-edge N: 73415-0961 # USB A plug for SMT # # Note: the signal pads are enlarged by 0.2 mm and their center is shifted by # 0.1 mm with respect to the reference. # # According to the data sheet, the leads terminate at (2.00+/-0.10 mm)/2+ # 2.48 mm = 3.48+/-0.10 mm from the center. The reference footprint puts the # edge of the pads at (2.00+/-0.10 mm)/2+2.6 mm = 3.6 mm+/-0.10 mm, so the # maximum lead end could be at 3.58 mm while the minimum pad edge could be at # 3.5 mm. # # Assuming that the pad is intended to extend a bit beyond the lead, we need # to add 0.2 mm to compensate for these tolerances. (The pad tolerance may not # be intended to be used this way, however, we still have to consider small # errors in registration, which also amount to about 0.1 mm, so the calculation # remains valid.) # F: usb_a_plug_smt # SOT-323 package with counter-clockweise or clockwise pin assignment F: sot-323 N: mmst3904 # U.FL/Micro Coax/... receptacle F: u-fl-receptacle N: u.fl-receptacle