October 1994

2

Philips Semiconductors

Product specification

Satellite sound circuit with noise reduction

TDA8741; TDA8741H

FEATURES

• Demodulation of main audio signal using wide band PLL

(lock range selectable)

• 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 TDA8741; TDA8741H 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

ORDERING INFORMATION

Note

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.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply

supply voltage

8

12

13.2

V

Main channel

input sensitivity pin 18 (14) (RMS value)

S/N(A) = 40 dB

−

1.0

2.0

mV

lock range PLL demodulator

either

5.5

−

7.5

MHz

or

10.0

−

11.5

MHz

output voltage pin 23 (19)

−9

−6

−4

dBV

S/N(A)

signal-to-noise ratio

A-weighted

62

70

−

dB

Secondary channels

0.8

1.5

mV

lock range PLL demodulators

10.0

−

11.5

MHz

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

crosstalk from main to secondary channel

−

74

−

dB

crosstalk between secondary channels

−

74

−

dB

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA8741

SDIP42

plastic shrink dual in-line package; 42 leads (600 mil)

SOT270-1

TDA8741H

plastic quad flat package; 44 leads (lead length 1.3 mm);

body 10

× 10 × 1.75 mm

SOT307-2