STC micro STC8A8K64D4 Series - QFN48 Package Mechanical Data (6 Mm*6 Mm)

STC8A8K64D4 Series Manual
-
- 38 -
4.3 QFN48 Package mechanical data (6mm*6mm)
D (6mm)
E (6mm)
PIN 1
A
A1
A3
1
12
13 24
36
25
48 37
K
b(0.20mm)
e(0.4mm)
L
E2
D2
R
1
12
13
25
39 48
24
35
R
K
L
e
E2
E
D2
D
b
A3
A1
A
SYMBOL
0.09
0.35
3.95
5.90
3.95
5.90
0.15
0.00
0.70
MIN
- -
0.40 0.45
4.05 4.15
6.00 6.10
4.05 4.15
6.00 6.10
0.20 0.25
0.20REF
0.02 0.05
0.75 0.80
TYP MAX
General size
mm
0.20
0.450.35 0.40
The back metal sheet (substrate) of STC's existing QFN48packaged chip is not grounded inside the chip. It can be grounded
or ungrounded on the user's PCB board, which will not affect the performance of the chip.