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TDA9321

I2C-bus controlled TV input processor

Philips Electronics 

Philips Semiconductors

I2C-bus controlled TV input processor

Preliminary specification

TDA9321H

FEATURES

• Multistandard Vision IF (VIF) circuit with Phase-Locked

Loop (PLL) demodulator

• Sound IF (SIF) amplifier with separate input for single

reference Quasi Split Sound (QSS) mode and separate

Automatic Gain Control (AGC) circuit

• AM demodulator without extra reference circuit

• Switchable group delay correction circuit which can be

used to compensate the group delay pre-correction of

the B/G TV standard in multistandard TV receivers

• Several (I2C-bus controlled) switch outputs which can

be used to switch external circuits such as sound traps,

etc.

• Flexible source selection circuit with 2 external

CVBS inputs, 2 Luminance (Y) and Chrominance (C)

(or additional CVBS) inputs and 2 independently

switchable outputs

• Comb filter interface with CVBS output and Y/C input

• Integrated chrominance trap circuit

• Integrated luminance delay line with adjustable delay

time

• Integrated chrominance band-pass filter with switchable

centre frequency

• Multistandard colour decoder with 4 separate pins for

crystal connection and automatic search system

• PALplus helper demodulator

• Possible blanking of the helper signals for PALplus and

EDTV-2

• Internal baseband delay line

• Two linear RGB inputs with fast blanking; the

RGB signals are converted to YUV signals before they

are supplied to the outputs; one of the RGB inputs can

also be used as YUV input

• Horizontal synchronization circuit with switchable time

constant for the PLL and Macrovision/subtitle gating

• Horizontal synchronization pulse output or clamping

pulse input/output

• Vertical count-down circuit

• Vertical synchronization pulse output

• Two-level sandcastle pulse output

• I2C-bus control of various functions

• Low dissipation.

GENERAL DESCRIPTION

The TDA9321H (see Fig.1) is an input processor for

‘High-end’ television receivers. It contains the following

functions:

• Multistandard IF amplifier with PLL demodulator

• QSS-IF amplifier and AM sound demodulator

• CVBS and Y/C switch with various inputs and outputs

• Multistandard colour decoder which can also decode the

PALplus helper signal

• Integrated baseband delay line (64 µs)

• Sync processor which generates the horizontal and

vertical drive pulses for the feature box

(100 Hz applications) or display processor

(50 Hz applications).

The supply voltage for the TDA9321H is 8 V.

ORDERING INFORMATION

TYPE

NUMBER

TDA9321H

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.95 mm);

body 14 × 20 × 2.8 mm

VERSION

SOT319-2

1998 Dec 16

2

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