User manual

20
8025I–AVR–02/09
ATmega48P/88P/168P/328P
7.2 28M1
TITLE
DRAWING NO. GPC
REV.
Package Drawing Contact:
[e-mail]
28M1ZBV B
28M1, 28-pad, 4 x 4 x 1.0 mm Body, Lead Pitch 0.45 mm,
2.4 x 2.4 mm 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)