25©2016 Integrated Device Technology, Inc Revision A April 28, 2016
844S42I Data Sheet
Package Outline and Package Dimensions
Package Outline - K Suffix for 56 Lead VFQFN
Table 9. Package Dimensions
Reference Document: JEDEC Publication 95, MO-220
NOTE: The following package mechanical drawing is a generic
drawing that applies to any pin count VFQFN package. This drawing
is not intended to convey the actual pin count or pin layout of this
device. The pin count and pinout are shown on the front page. The
package dimensions are in Table 9.
To p View
Index Area
D
Chamfer 4x
0.6 x 0.6 max
OPTIONAL
Anvil
Singula tion
A
0. 0 8 C
C
A3
A1
S eating Plan e
E2
E2
2
L
(N
-1)x e
(Ref.)
(Ref.)
N & N
Even
N
e
D2
2
D2
(Ref.)
N & N
Odd
1
2
e
2
(Ty p.)
If N & N
are Even
(N -1)x e
(Re f.)
b
Th er mal
Ba se
N
OR
Anvil
Singulation
or
Sawn
Singulation
N-1N
CHAMFER
1
2
N-1
1
2
N
RADIUS
4
4
Bottom View w/Type C IDBottom View w/Type A ID
There are 2 methods of indicating pin 1 corner at the back of the VFQFN package:
1. Type A: Chamfer on the paddle (near pin 1)
2. Type C: Mouse bite on the paddle (near pin 1)
SPEC NON_JEDEC: VLLD-2/-5
All Dimensions in Millimeters
Symbol Minimum Maximum
N 56
A 0.80 1.00
A1 00.05
A3 0.25 Ref.
b 0.18 0.30
N
D
& N
E
14
D & E 8.00 Basic
D2 4.35 4.65
E2 5.05 5.35
e 0.50 Basic
L 0.30 0.50
SPEC NON_JEDEC: VLLD-2/-5
All Dimensions in Millimeters
Symbol Minimum Maximum
