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TDA8742H データシート(PDF) 2 Page - NXP Semiconductors

部品番号 TDA8742H
部品情報  Satellite sound circuit with noise reduction
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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October 1994
2
Philips Semiconductors
Product specification
Satellite sound circuit with noise reduction
TDA8742; TDA8742H
FEATURES
• Demodulation of main audio signal using wide band PLL
(lock range selectable)
• HF input selection: two-out-of-eight secondary audio
signals can be selected
• Demodulation of secondary audio signals using wide
band PLL
• Noise reduction of the secondary audio signals
• Output selection: stereo, language 1, language 2, main
audio and external
• Mute control
• Line outputs (SCART level).
APPLICATIONS
• Satellite receivers
• TV sets
• Video recorders.
GENERAL DESCRIPTION
The TDA8742; TDA8742H is a multi-function sound IC for
use in satellite receivers, television sets and video
recorders. The pin numbers given in parenthesis
throughout this document refer to the QFP44 package.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VP
supply voltage
8
12
13.2
V
Main channel
VIN3(rms)
input sensitivity pin 18 (14) (RMS value)
S/N(A) = 40 dB
1.0
2.0
mV
∆fOM
lock range PLL demodulator
either
5.5
7.5
MHz
or
10.0
11.5
MHz
VOM
output voltage pin 23 (19)
−9
−6
−4
dBV
S/N(A)
signal-to-noise ratio
A-weighted
62
70
dB
Secondary channels
VIN1,IN2(rms) input sensitivity pins 2, 4, 6, 8, 10, 12, 14 and 16
(1, 3, 5, 7, 9, 11, 40 and 42) (RMS value)
S/N(A) = 40 dB
0.8
1.5
mV
∆fOS1,2
lock range PLL demodulators
10.0
11.5
MHz
VOR,OL
output voltage pins 24 and 25 (20 and 21)
−8
−6
−4
dBV
S/N(A)
signal-to-noise ratio
A-weighted
72
80
dB
Crosstalk
α
S/M
crosstalk from secondary to main channel
74
dB
αM/S
crosstalk from main to secondary channel
74
dB
αS/S
crosstalk between secondary channels
74
dB


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