TDA4650 datasheet(8/13 Pages) PHILIPS

8 / 13 page

March 1991

Philips Semiconductors

Preliminary speciﬁcation

Multistandard colour decoder, with

negative colour difference output signals

TDA4650

Demodulator part (SECAM) (continued); note 1

∆V1,3/∆VP

shift of blanking levels relative to

demodulated fo levels

−−

mV/V

∆V

1/∆T

−

0.16

−

mV/K

∆V

3/∆T

−−0.25

−

mV/K

Hue control part

phase shift of reference carrier

relative to phase at V17 =3V

V17 =2V

−30

−40

−

deg

phase shift of reference carrier

V17 =3V

−

± 5

deg

phase shift of reference carrier

relative to phase at V17 =3V

V17 = 4 V

−

deg

V17

internal bias voltage

−

switching voltage for oscillator

adjustment

burst OFF; colour ON

−

0.5

switching voltage for forced

colour ON

burst ON; colour ON

5.5

−

R17

input resistance

3.8

5.0

6.2

Ω

Reference oscillator (PLL); note 2

R19,21

input resistance

−

350

−Ω

C19,21

input resistance

−−

catching range

at 4.43 MHz

± 400

−−

at 3.57 MHz

± 330

−−

Identiﬁcation part

switching voltages for chrominance ﬁlters and crystals:

at pin 28 for PAL

at pin 27 for SECAM

at pin 26 for NTSC (3.58 MHz)

at pin 25 for NTSC (4.43 MHz)

V28 to 25

switching voltages

control voltage OFF state

−

0.05

0.5

control voltage ON state;

during scanning

2.35

2.45

2.55

control voltage ON state;

internal forced

5.6

5.8

6.0

control voltage ON state;

external forced

9.0

I28 to 25

output currents

−−−3mA

delay time for system hold

−

cycles

delay time for colour ON

−

cycles

delay time for colour OFF

−

cycles

scanning time for each standard

note 3

−

cycles

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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