
20
2545TS–AVR–05/11
ATmega48/88/168
10.2
28M1
TITLE
DRAWING NO.
GPC
REV.
Package Drawing Contact:
packagedrawings@atmel.com
28M1
ZBV
B
28M1, 28-pad,4 x 4 x 1.0mm Body, Lead Pitch 0.45mm,
2.4 x 2.4mm Exposed Pad, Thermally Enhanced
Plastic Very Thin Quad Flat No Lead Package (VQFN)
10/24/08
SIDE VIEW
Pin 1 ID
BOTTOM VIEW
TOP VIEW
Note:
The terminal #1 ID is a Laser-marked Feature.
D
E
e
K
A1
C
A
D2
E2
y
L
1
2
3
b
1
2
3
0.45
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
A
0.80
0.90
1.00
A1
0.00
0.02
0.05
b
0.17
0.22
0.27
C
0.20 REF
D
3.95
4.00
4.05
D2
2.35
2.40
2.45
E
3.95
4.00
4.05
E2
2.35
2.40
2.45
e
0.45
L
0.35
0.40
0.45
y
0.00
–
0.08
K
0.20
–
R 0.20
0.4 Ref
(4x)