HMP8116 Datasheet, PDF (38/43 Pages) Intersil Corporation – NTSC/PAL Video Decoder

Pinout
HMP8116
80 LEAD PQFP
TOP VIEW
AGND
VAA
AGND
NC
CVBS3(Y)
CVBS2
CVBS1
YIN
YOUT
AGND
AGND
VAA
NC
VAA
AGND
AGND
A/D_TEST
NC
C
NC
AGND
AGND
AGND
AGND
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65
1
64
2
63
3
62
4
61
5
60
6
59
7
58
8
57
9
56
10
55
11
54
12
53
13
52
14
51
15
50
16
49
17
48
18
47
19
46
20
45
21
44
22
43
23
42
24
41
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
P15
P14
GND
VBIVALID
P13
VCC
P12
P11
P10
P9
P8
GND
VCC
P7
P6
P5
P4
P3
GND
P2
INTREQ
P1
P0
SCL
Applications Information
PCB LAYOUT CONSIDERATIONS
A PCB board with a minimum of 4 layers is recommended, with
layers 1 and 4 (top and bottom) for signals and layers 2 and 3
for power and ground. The PCB layout should implement the
lowest possible noise on the power and ground planes by pro-
viding excellent decoupling.
The optimum layout places the HMP8116 as close as possible
to the power supply connector and the video input connector.
Component Placement
External components should be positioned as close as pos-
sible to the appropriate pin, ideally such that traces can be
connected point to point. Chip capacitors are recommended
where possible, with radial lead ceramic capacitors the sec-
ond-best choice.
Power supply decoupling should be done using a 0.1µF
ceramic capacitor in parallel with a 0.01µF chip capacitor for
each group of V_AA and V_CC pins to ground. These capaci-
tors should be located as close to the power and ground pins
as possible, using short, wide traces.
Digital Ground Plane
All GND pins on the HMP8116 should be connected to the
digital ground plane of the board.
Analog Ground Plane
A separate analog ground plane for the HMP8116 is recom-
mended. All AGND pins on the HMP8116 should be con-
nected to the analog ground plane. This analog ground
plane should be connected to the board’s digital ground
plane at a single point.
Analog Power Plane
The HMP8116 should have its own V_AA power plane that is
isolated from the common power plane of the board, with a
gap between the two power planes of at least 1/8 inch. All
V_AA pins on the HMP8116 must be connected to this analog
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