Package mechanical data

ST2129B

18/21

DocID023308 Rev 2

Figure 8. Package outline for QFN8 (1.4 x 1.2 x 0.55 mm) - 0.40 mm pitch

1. Dimension b applies to metallized terminal and is measured between 0.10 and 0.20 mm from the terminal

tip. If the terminal has the optional radius on the other end of the terminal. Dimension b should not be

measured in that radius area.

2. Applied only for terminals.

3. Bilateral coplanarity zone applies to the exposed heatsink slug as well as the terminals.

4. Dimensions and tolerancing conform to ASME Y14.5M - 1994.

Table 12. Mechanical data for QFN8 (1.4 x 1.2 x 0.55 mm) - 0.40 mm pitch

Symbol

Dimensions (mm)

Note

Min.

Nom.

Max.

A

0.50

0.55

0.60

A1

0.00

-

0.05

b

0.15

0.20

0.25

(1)

terminal tip. If the terminal has the optional radius on the other end of the terminal. Dimension b should not

be measured in that radius area.

B

0

-

12°

(2)

2. All dimensions are in millimeters, B is in degrees.

e

0.40 BSC

N

8

(3)

3. N is the total number of terminals.

L

0.25

0.30

0.35

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