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PDF TW2802 Data sheet ( Hoja de datos )
| Número de pieza | TW2802 | |
| Descripción | TW2802/4 Multiple Video Decoder For Security Applications | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TW2802 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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TW2802/4 Multiple Video Decoder
For Security Applications
Preliminary Data Sheet from Techwell, Inc.
Information may change without notice
Disclaimer
This document provides technical information for the user. Techwell Inc. reserves the right to
modify the information in this document as necessary. The customer should make sure that
they have the most recent data sheet version. Techwell Inc. holds no responsibility for any
errors that may appear in this document. Customers should take appropriate action to ensure
their use of the products does not infringe upon any patents. Techwell Inc. respects valid
patent rights of third parties and does not infringe upon or assist others to infringe upon such
rights.
Techwell, Inc.
www.techwellinc.com
09/09/2003
Datasheet Rev. 2.4
1 page  
TW2804/TW2802 Multiple Video Decoder
Pin Diagram
Preliminary
103 IRQ
104 HWRB
105 VDDO
106 HRDB
107 HALE
108 VSS
109 HCSB
110 HSPB
111 VDDAD
112 VDDA
113 VIN1A
114 VIN1B
115 VSSA
116 VSSA
117 VIN2A
118 VIN2B
119 VDDA
120 VDDA
121 VIN3A
122 VIN3B
123 VSSA
124 VSSA
125 VIN4A
126 VIN4B
127 VDDA
128 VSSAD
Analog Pin
(4 ADC)
TW280X
(128QFP)
VD3[1]
VSS
VD3[2]
VD3[3]
VDD
VD3[4]
VD3[5]
VSS
VD3[6]
VD3[7]
VSS
VALID3
ACTIVE3
VSS
HS3
VS3
VDD
FLD3
NVMD3
VDDO
VD2[0]
VD2[1]
VSS
VD2[2]
VD2[3]
VSS
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
Pin Description
Analog Interface Pins
Name
Number
VIN1A
113
VIN1B
114
VIN2A
117
VIN2B
118
VIN3A
121
VIN3B
122
VIN4A
125
VIN4B
126
Type
Description
A
Composite video input A of Channel 1.
Must be connected through 2.2uF cap to input.
A
Composite video input B of Channel 1.
Must be connected through 2.2uF cap to input.
A
Composite video input A of Channel 2.
Must be connected through 2.2uF cap to input.
A
Composite video input B of Channel 2.
Must be connected through 2.2uF cap to input.
A
Composite video input A of Channel 3.
Must be connected through 2.2uF cap to input.
A
Composite video input B of Channel 3.
Must be connected through 2.2uF cap to input.
A
Composite video input A of Channel 4.
Must be connected through 2.2uF cap to input.
A
Composite video input B of Channel 4.
Must be connected through 2.2uF cap to input.
Techwell, Inc.
www.techwellinc.com
5
09/09/2003
Datasheet Rev. 2.4
5 Page 
TW2804/TW2802 Multiple Video Decoder
Preliminary
Y/C Separation
The adaptive comb filter is used for high quality luminance/chrominance separation from
NTSC/PAL composite video signals. The comb filter improves the luminance resolution and
reduces noise such as cross-luminance and cross-color. The adaptive algorithm eliminates
most of errors without introducing new artifacts or noise. To accommodate some viewing
preferences, additional chrominance trap filters are also available in the luminance path. Fig. 2
and Fig 3 show the frequency response of notch filter for each system NTSC and PAL.
0
-10
-20
-30
-40
-50
-60
012 3456
Frequency (Hertz)
x 106
Fig. 2 The Characteristics of Luminance Notch Filter for NTSC
0
-10
-20
-30
-40
-50
-60
012 3456
Frequency (Hertz)
x 106
Fig 3 The Characteristics of Luminance Notch Filter for PAL
Techwell, Inc.
www.techwellinc.com
11
09/09/2003
Datasheet Rev. 2.4
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TW2802.PDF ] | |
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