The
Thin Dual Flat No Leads
package, or TDFN,
is
a very small and thin square-shaped or rectangular surface-mount plastic package with no leads.
Instead of leads, it uses metal pads along two sides of the package
body for electrical connection to the outside world.
It is basically a thinner version of the dual flat no
leads (DFN) package.
Typical TDFN pad counts range from 6 to
28. The maximum body thickness of TDFN
packages is 0.8 mm. The long side of typical TDFN package bodies range from
2 mm to 8 mm. The pad pitch
(distance between pads) used by TDFN packages is
usually either 0.4 mm or 0.5 mm, although other pad pitch values are
also used.
Table 1. Properties of
Some Examples of TDFN's
|
Part Number |
No. of Pads |
Body
Size |
Body Thickness |
Pad Pitch |
|
TDFN-6 |
6 |
3 mm x
3 mm |
0.75 mm |
0.95 mm |
|
TDFN-8 |
8 |
3 mm x
3 mm |
0.75 mm |
0.65 mm |
|
TDFN-8 |
8 |
2
mm x 2 mm |
0.75 mm |
0.5 mm |
|
TDFN-10 |
10 |
2 mm x 3 mm |
0.75 mm |
0.5 mm |
|
TDFN-10 |
10 |
3 mm x
4 mm |
0.75 mm |
0.5 mm |
|
TDFN-14 |
14 |
3 mm x 5 mm |
0.75 mm |
0.4 mm |
|
TDFN-28 |
28 |
4 mm x 8 mm |
0.75 mm |
0.5 mm |
