The
Thin Quad Flat No Leads
package, or TQFN,
is
a very small and thin square-shaped or rectangular surface-mount plastic package with no leads.
Instead of leads, it uses metal pads around the periphery of the bottom
of the package
body for electrical connection to the outside world.
It is basically a thinner version of the quad flat no
leads (QFN) package.
Typical TQFN pad counts range from 8 to
68. The maximum body thickness of TQFN
packages is 0.8 mm. The body sizes of typical TQFN's range from 3 mm.
square to 10 mm. square. The pad pitch
(distance between pads) used by TQFN packages is
usually either 0.4 mm or 0.5 mm.
Table 1. Properties of
Some Examples of TQFN's
|
Part Number |
No. of Pads |
Body
Size |
Body Thickness |
Pad Pitch |
|
TQFN-8 |
8 |
3 mm x 3 mm |
0.75 mm |
0.65 mm |
|
TQFN-16 |
16 |
3 mm x 3 mm |
0.75 mm |
0.4 mm |
|
TQFN-20 |
20 |
4 mm x 4 mm |
0.75 mm |
0.5 mm |
|
TQFN-24 |
24 |
4 mm x 5 mm |
0.75 mm |
0.5 mm |
|
TQFN-36 |
36 |
6 mm x 6 mm |
0.75 mm |
0.5 mm |
|
TQFN-48 |
48 |
6 mm x 8 mm |
0.75 mm |
0.5 mm |
|
TQFN-56 |
56 |
7 mm x 7 mm |
0.75 mm |
0.4 mm |
|
TQFN-68 |
68 |
10 mm x 10 mm |
0.75 mm |
0.5 mm |
