The
Extremely Thin Quad Flat No Leads
package, or XQFN,
is
a very small and extremely thin square-shaped or rectangular surface-mount plastic package with no leads.
Instead of leads, it uses metal pads around the periphery of the package
body for electrical connection to the outside world.
It is basically a thinner version of the ultra thin quad flat no
leads (UTQFN) package.
The body thickness of XQFN
packages typically has a maximum value of 0.40 mm. The pad pitch
(distance between pads) used by XQFN packages varies from 0.35 mm to 0.5 mm.
Table 1. Properties of
Some Examples of XQFN's
|
No. of Pads |
Body
Size |
Body Thickness |
Pad Pitch |
|
12 |
2.5 mm x
2.5 mm |
0.4 mm |
0.5 mm |
|
14 |
2.5 mm x
2.5 mm |
0.35 mm |
0.5 mm |
|
20 |
2.7 mm x
2.7 mm |
0.35 mm |
0.4 mm |
|
22 |
2.4 mm x
3.3 mm |
0.35 mm |
0.4 mm |
|
24 |
2.2 mm x
2.9 mm |
0.35 mm |
0.35 mm |
|
36 |
5 mm x
5 mm |
0.45 mm |
0.4 mm |
