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TDA4650

Multistandard colour decoder, with negative colour difference output signals

Philips Electronics 

Philips Semiconductors

Multistandard colour decoder, with negative

colour difference output signals

Preliminary specification

TDA4650

FEATURES

Identifies and demodulates PAL,

SECAM, NTSC 3.58 and NTSC 4.43

chrominance signals with:

• Identification

– automatic standard identification

by sequential inquiry

– secure SECAM identification at

50 Hz only, with PAL priority

– four switched outputs for

chrominance filter selection and

display control

– external service switch for

oscillator adjustment

• PAL / NTSC demodulation

– H (burst) and V blanking

– PAL switch (disabled for NTSC)

– NTSC phase shift (disabled for

PAL)

– PLL-controlled reference

oscillator

– two reference oscillator crystals

on separate pins with automatic

switching

– quadrature demodulator with

subcarrier reference

• SECAM demodulation

– limiter-amplifier

– quadrature-demodulator with a

single external reference tuned

circuit

– alternate line blanking, H and V

blanking

– de-emphasis

• Gain controlled chrominance

amplifier

• ACC demodulation controlled by

system scanning

• Internal colour-difference signal

output filters to remove the residual

subcarrier

GENERAL DESCRIPTION

The TDA4650 is a monolitic

integrated multistandard colour

decoder for PAL, SECAM and NTSC

(3.58 and 4.43 MHz) with negative

colour difference output signals. The

colour-difference output signals are

fed to the TDA4660/TDA4661,

Switched capacitor delay line.

QUICK REFERENCE DATA

SYMBOL

Vp

Ip

vi(p-p)

Vo(p-p)

PARAMETER

supply voltage range (pin 13)

supply current

(pin 13)

chrominance input voltage (pin 15)

(peak-to-peak value)

colour-difference output voltage (pin 1)

(peak-to-peak value)

colour-difference output voltage (pin 3)

(peak-to-peak value)

colour-difference output voltage (pin 1)

(peak-to-peak value)

colour-difference output voltage (pin 3)

(peak-to-peak value)

CONDITIONS

MIN.

10.8

−

TYP.

12.0

60

MAX.

13.2

−

UNIT

V

mA

20

100

400

mV

PAL/NTSC

0.42 0.525 0.66 V

PAL/NTSC

0.53 0.665 0.84 V

SECAM

0.83 1.05 1.32 V

SECAM

1.06 1.33 1.67 V

ORDERING INFORMATION

EXTENDED

TYPE NUMBER

TDA4650

TDA4650WP

PINS

28

28

Note

1. SOT117-1; 1996 November 28.

2. SOT261-2; 1996 November 28.

PIN POSITION

DIL

PLCC

PACKAGE

MATERIAL

plastic

plastic

CODE

SOT117(1)

SOT261(2)

March 1991

2

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