wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 55

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
w
PACKAGE DIMENSIONS
FL: 28 PIN COL QFN PLASTIC PACKAGE 4
Symbols
A3
SEATING PLANE
C
NOTES:
1. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.15 mm AND 0.30 mm FROM TERMINAL TIP.
2. ALL DIMENSIONS ARE IN MILLIMETRES.
3. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
4. REFER TO APPLICATIONS NOTE WAN_0118 FOR FURTHER INFORMATION REGARDING PCB FOOTPRINTS AND QFN PACKAGE SOLDERING.
5. DEPENDING ON THE METHOD OF LEAD TERMINATION AT THE EDGE OF THE PACKAGE, PULL BACK (L1) MAY BE PRESENT.
6. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE.
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bbb
ccc
REF:
L1
A1
A3
W
A
D
E
G
H
T
b
e
L
A
15
21
Tolerances of Form and Position
14
22
A3
0.500
MIN
0.18
3.95
3.95
0
Exposed lead
BOTTOM VIEW
e
SIDE VIEW
b
0.152 REF
0.535 REF
0.076 REF
0.076 REF
0.230 REF
0.45 BSC
0.40 REF
0.05 REF
0.550
0.025
NOM
0.15
JEDEC, MO-220
0.10
0.23
4.00
4.00
0.10
b
H
28
8
Dimensions (mm)
W
1
7
1
bbb
DETAIL 2
DETAIL 2
0.600
A1
M
T
MAX
0.05
0.28
4.05
4.05
G
A
C
DETAIL 1
A
SEE DETAIL 2
B
X
ccc
4
0.08
X
C
0.55 mm BODY, 0.45 mm LEAD PITCH
C
NOTE
1
5
5
2 X
4
DETAIL 1
2 X
INDEX AREA
(D/2 X E/2)
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C
0.275MM
C
0.275MM
PIN 1
IDENTIFICATION
0.150MM SQUARE
TOP VIEW
D
DETAIL 2
Datum
R
L
L1
E
DM050.B
e
Terminal
Tip
e/2
PD, Rev 4.0, October 2008
WM8988
55