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INTEGRATED CIRCUITS
DATA SHEET
TDA8742; TDA8742H Satellite sound circuit with noise reduction
Product specification Supersedes data of November 1992 File under Integrated Circuits, IC02 October 1994
Philips Semiconductors
Philips Semiconductors
Product specification
Satellite sound circuit with noise reduction
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). QUICK REFERENCE DATA SYMBOL Supply VP VIN3(rms) ∆fOM supply voltage PARAMETER APPLICATIONS • Satellite receivers • TV sets • Video recorders.
TDA8742; TDA8742H
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.
CONDITIONS
MIN.
TYP.
MAX.
UNIT
8 S/N(A) = 40 dB − 5.5 10.0 −9 A-weighted 62
12
13.2
V
Main channel input sensitivity pin 18 (14) (RMS value) lock range PLL demodulator either or VOM S/N(A) output voltage pin 23 (19) signal-to-noise ratio − − −6 70 7.5 11.5 −4 − MHz MHz dBV dB 1.0 2.0 mV
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) ∆fOS1,2 VOR,OL S/N(A) Crosstalk αS/M αM/S αS/S crosstalk from secondary to main channel crosstalk from main to secondary channel crosstalk between secondary channels − − − 74 74 74 − − − dB dB dB lock range PLL demodulators output voltage pins 24 and 25 (20 and 21) signal-to-noise ratio A-weighted S/N(A) = 40 dB − 10.0 −8 72 0.8 − −6 80 1.5 11.5 −4 − mV MHz dBV dB
October 1994
2
Philips Semiconductors
Product specification
Satellite sound circuit with noise reduction
ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA8742 TDA8742H Note SDIP42 QFP44(1) DESCRIPTION
TDA8742; TDA8742H
VERSION SOT270-1 SOT307-2
plastic shrink dual in-line package; 42 leads (600 mil) plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 × 10 × 1.75 mm
1. When using IR reflow soldering it is recommended that the Drypack instructions in the “Quality Reference Handbook” (order number 9398 510 63011) are followed. BLOCK DIAGRAM
The pin numbers in parenthesis refer to the QFP44 package.
Fig.1 Block diagram.
October 1994
3
Philips Semiconductors
Product specification
Satellite sound circuit with noise reduction
PINNING SYMBOL n.c. IN-1A Isel 1 IN-1B Isel 2 IN-1C MCS IN-1D HFGND IN-2A SCD IN-2B MUTE IN-2C Osel L IN-2D Osel R IN-3 VREF CD M CC M VP OM OR OL EXT/INT EXTR EXTL CATT/REC R RECTR CNR D R CD R CC R AFGND CC L CD L CNR D L RECTL CATT/REC L October 1994 PIN SDIP42 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 PIN QFP44 39 40 41 42 43 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 not connected intercarrier input A for Channel 1 (left) input select switch bit 1 intercarrier input B for Channel 1 (left) input select switch bit 2 intercarrier input C for Channel 1 (left)
TDA8742; TDA8742H
DESCRIPTION
main channel PLL lock-in range select/disable intercarrier input D for Channel 1 (left) ground for HF section intercarrier input A for Channel 2 (right) secondary channels PLLs disable intercarrier input B for Channel 2 (right) mute switch intercarrier input C for Channel 2 (right) output select switch bit 1 (left) intercarrier input D for Channel 2 (right) output select switch bit 2 (right) intercarrier input for main channel decoupling capacitor for reference voltage de-emphasis capacitor for main channel audio pass-through capacitor input for main channel positive supply voltage main channel output right channel output left channel output output switch bit 3 (external/internal) external audio input (right) external audio input (left) attack/recovery capacitor (right) rectifier DC decoupling (right) noise reduction de-emphasis capacitor (right) fixed de-emphasis capacitor (right) audio pass-through capacitor input for right channel ground for AF section audio pass-through capacitor input for left channel fixed de-emphasis capacitor (left) noise reduction de-emphasis capacitor (left) rectifier DC decoupling (left) attack/recovery capacitor (left) 4
Philips Semiconductors
Product specification
Satellite sound circuit with noise reduction
TDA8742; TDA8742H
SYMBOL CDC L CDC M CDC R n.c. n.c.
PIN SDIP42 40 41 42 − −
PIN QFP44 36 37 38 12 44
DESCRIPTION DC decoupling capacitor (left) DC decoupling capacitor (main) DC decoupling capacitor (right) not connected not connected
Fig.2 Pin configuration (SDIP42).
October 1994
5
Philips Semiconductors
Product specification
Satellit.