WM8731 / WM8731L

Production Data

w

PD Rev 4.2 November 2005

62

PACKAGE DIMENSIONS - QFN

NOTES:

1. DIMENSION b APPLIED TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 mm AND 0.30 mm FROM TERMINAL TIP. DIMENSION L1 REPRESENTS TERMINAL PULL BACK FROM

PACKAGE SIDE WALL. MAXIMUM OF 0.1mm IS ACCEPTABLE. WHERE TERMINAL PULL BACK EXISTS, ONLY UPPER HALF OF LEAD IS VISIBLE ON PACKAGE SIDE WALL DUE TO HALF

ETCHING OF LEADFRAME.

2. FALLS WITHIN JEDEC, MO-220 WITH THE EXCEPTION OF D2, E2:

D2,E2: LARGER PAD SIZE CHOSEN WHICH IS JUST OUTSIDE JEDEC SPECIFICATION

3. ALL DIMENSIONS ARE IN MILLIMETRES

4. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE.

5. SHAPE AND SIZE OF CORNER TIE BAR MAY VARY WITH PACKAGE TERMINAL COUNT. CORNER TIE BAR IS CONNECTED TO EXPOSED PAD INTERNALLY

6. REFER TO APPLICATION NOTE WAN_0118 FOR FURTHER INFORMATION REGARDING PCB FOOTPRINTS AND QFN PACKAGE SOLDERING.

DM023.F

C

aaa

INDEX AREA

(D/2 X E/2)

C

aaa

2 X

2 X

TOP VIEW

D

E

C

0.08

C

ccc

A

A1

C

(A3)

SEATING PLANE

1

14

13

b

15

L

D2/2

D2

E2

E2/2

SEE DETAIL B

B

C

A

B

B

A

A

27

28

1

2

7

8

21

22

e

5

CORNER

TIE BAR

DETAIL A

B

C

A

28x b

L1

1

1

5

CORNER

TIE BAR

0.1

5

DETAIL B

SEE DETAIL A

Symbols

Dimensions (mm)

MIN

NOM

MAX

NOTE

A

A1

A3

b

D

D2

E

E2

e

L

L1

R

0.85

0.90

1.00

0.05

0.02

0

0.2 REF

0.30

0.23

0.18

5.00 BSC

3.4

3.3

3.2

5.00 BSC

0.5 BSC

3.3

3.4

3.2

0.35

0.4

0.45

0.1

b(min)/2

1

2

2

1

K

0.20

aaa

bbb

ccc

REF:

0.15

0.10

0.10

JEDEC, MO-220, VARIATION VKKD-2

Tolerances of Form and Position

EXPOSED

GROUND

PADDLE

EXPOSED

GROUND

PADDLE

6

BOTTOM VIEW

SIDE VIEW

0.210mm