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TDA9181T Fiches technique(PDF) 2 Page - NXP Semiconductors

No de pièce TDA9181T
Description  Integrated multistandard comb filter
Download  32 Pages
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA9181T Fiches technique(HTML) 2 Page - NXP Semiconductors

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2000 Nov 22
2
Philips Semiconductors
Objective specification
Integrated multistandard comb filter
TDA9181
FEATURES
• One-chip multistandard adaptive comb filter
• Cross luminance reduction
• Cross colour reduction
• No chroma trap, therefore sharper vertical luminance
transients
• Analog discrete-time signal processing, therefore no
quantization noise
• Anti-aliasing and reconstruction filters are included
• Input switch selects between two Y/CVBS inputs
• Output switch selects between combed CVBS and an
external Y/C source
• fSC as well as 2 × fSC colour subcarrier signal may be
applied
• Alignment free
• Few external components
• Low power.
GENERAL DESCRIPTION
The TDA9181 is a an adaptive PAL/NTSC comb filter with
two internal delay lines, filters, clock control and input
clamps. Video standards PAL B, G, H, D, I, M and N and
NTSC M are supported.
Two CVBS input signals can be selected by means of an
input switch.
The selected CVBS input signal is filtered to obtain
a combed luminance output signal and a combed
chrominance output signal. Switched capacitor circuit
techniques are used, requiring an internal clock, locked on
to the colour subcarrier frequency.
The colour subcarrier frequency as well as twice the colour
subcarrier frequency may be applied to the IC.
In addition to the comb filter the circuit contains an output
switch so that a selection can be made between the
combed CVBS signal and an external Y/C signal.
The IC is available in a DIP16 and SO16 package.
The supply voltage is 5 V.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VCCA
analog supply voltage
4.5
5.0
5.5
V
ICCA
analog supply current
25
mA
VDDD
digital supply voltage
4.5
5.0
5.5
V
IDDD
digital supply current
10
mA
Vi(Y/CVBS)(p-p)
luminance or CVBS input signal voltage (peak-to-peak value)
0.7
1.0
1.4
V
Vi(CIN)(p-p)
chrominance input signal voltage (peak-to-peak value)
0.7
1.0
V
Vi(FSC)(p-p)
colour subcarrier input signal voltage (peak-to-peak value)
100
200
400
mV
Vo(Y/CVBS)(p-p)
luminance or CVBS output signal voltage (peak-to-peak value)
0.6
1.0
1.54
V
Vo(CIN)(p-p)
chrominance output signal voltage (peak-to-peak value)
0.7
1.1
V
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA9181P
DIP16
plastic dual in-line package; 16 leads (300 mil); long body
SOT38-4
TDA9181T
SO16
plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1


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