AS1538/AS1540
Data Sheet - Package Drawings and Markings
Figure 31. TQFN 4x4 16-pin Package
Symbol
Min
Typ
4.00
4.00
2.15
2.15
0.30
0.65
16
Max
Notes
1, 2
Symbol
A
Min
0.70
0.00
0.45
0.03
0.20
Typ
0.75
0.02
0.55
Max
0.80
0.05
0.65
0.15
Notes
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
D BSC
E BSC
D2
1, 2
A1
2.00
2.00
0.25
2.25
2.25
0.35
1, 2
L
E2
1, 2
L1
b
1, 2, 5
K
e
aaa
bbb
ccc
ddd
0.10
0.10
0.10
0.05
N
1, 2
ND
4
1, 2, 5
Notes:
1. Dimensioning and tolerancing conform to ASME Y14.5M-1994.
2. All dimensions are in millimeters, angle is in degrees.
3. N is the total number of terminals.
4. Terminal #1 identifier and terminal numbering convention shall conform to JESD 95-1 SPP-012. Details of ter-
minal #1 identifier are optional, but must be located within the area indicated. The terminal #1 identifier may be
either a mold, embedded metal or mark feature.
5. Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip.
6. ND refers to the maximum number of terminals on D side.
7. Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals.
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