Scripted qfn for SX1272
https://github.com/pointhi/kicad-footprint-generator/pull/250
https://www.semtech.com/uploads/documents/sx1272.pdf#page=125
QFN-28-1EP_6x6mm_P0.65mm_EP4.8x4.8mm:
device_type: 'QFN'
size_source: 'https://www.semtech.com/uploads/documents/sx1272.pdf#page=125'
ipc_class: 'qfn' # 'qfn_pull_back'
body_size_x:
minimum: 5.9
nominal: 6
maximum: 6.1
body_size_y:
minimum: 5.9
nominal: 6
maximum: 6.1
body_height:
minimum: 0.8
maximum: 1
lead_width:
minimum: 0.25
nominal: 0.3
maximum: 0.35
lead_len:
minimum: 0.3
nominal: 0.4
maximum: 0.5
EP_size_x:
minimum: 4.65
nominal: 4.8
maximum: 4.9
EP_size_y:
minimum: 4.65
nominal: 4.8
maximum: 4.9
EP_num_paste_pads: [3, 3]
thermal_vias:
count: [4, 4]
drill: 0.2
paste_via_clearance: 0.1
paste_between_vias: 1
paste_rings_outside: 1
grid: [0.95, 0.95]
pitch: 0.65
num_pins_x: 7
num_pins_y: 7