WM8955BL Wolfson Microelectronics, WM8955BL Datasheet - Page 43

• Manufacturer Part Number: WM8955BL
• Description: Stereo DAC
• Manufacturer: Wolfson Microelectronics

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Production Data
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. FALLS WITHIN JEDEC, MO-220, VARIATION VGGD-2.
3. ALL DIMENSIONS ARE IN MILLIMETRES.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JEDEC 95-1 SPP-002.
5. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
6. REFER TO APPLICATIONS NOTE WAN_0118 FOR FURTHER INFORMATION REGARDING PCB FOOTPRINTS AND QFN PACKAGE SOLDERING.
7. DEPENDING ON THE METHOD OF LEAD TERMINATION AT THE EDGE OF THE PACKAGE, PULL BACK (L1) MAY BE PRESENT.
8. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE.
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bbb
ccc
REF:
L1
A1
A3
W
G
T
A
D
E
H
b
e
L
A
15
21
Tolerances of Form and Position
14
22
A3
0.725
MIN
0.18
3.95
3.95
0
Exposed lead
BOTTOM VIEW
e
SIDE VIEW
b
0.203 REF
0.535 REF
0.100 REF
0.100 REF
0.230 REF
0.45 BSC
0.40 REF
0.05 REF
NOM
0.15
JEDEC, MO-220
0.75
0.02
0.23
4.00
4.00
0.10
0.10
b
H
28
8
Dimensions (mm)
W
1
7
1
bbb
DETAIL 2
DETAIL 2
0.775
M
A1
MAX
T
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
0.75 mm BODY, 0.45 mm LEAD PITCH
C
NOTE
1
7
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
PD Rev 4.1 February 2007
L1
E
DM043.F
e
Terminal
tip
e/2
WM8955BL
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