June 1993

7

Philips Semiconductors

Preliminary specification

Generic multi-standard decoder

TDA4655

CHARACTERISTICS

200 mV (peak-to-peak value) and nominal phase for NTSC unless otherwise specified. All voltages measured

referenced to ground.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage

7.2

8.0

8.8

V

I

supply current

without load

25

31

37

mA

total power dissipation

without load

−

248

296

mW

CD signal outputs (pins 1 and 3)

PAL or NTSC

colour difference output signals

independent of supply voltage; note 1

−(R-Y) output PAL and NTSC 4.43 MHz

(peak-to-peak value)

442

525

624

mV

NTSC 3.58 MHz (peak-to-peak value)

370

440

523

mV

−(B-Y) output PAL and NTSC 4.43 MHz

(peak-to-peak value)

559

665

791

mV

NTSC 3.58 MHz (peak-to-peak value)

468

557

662

mV

signal ratio PAL/NTSC 3.58 MHz

note 2

0.5

1.5

2.5

dB

ratio of CD signal amplitudes

V(R-Y) / V(B-Y)

note 2

0.75

0.79

0.83

−

m

signal linearity

−(R-Y) output

0.8

−−−

signal linearity

−(B-Y) output

0.8

−−−

cut-off frequency (both outputs)

−3 dB

−

1

−

MHz

chrominance delay time

220

270

320

ns

S/N

signal to noise ratio for nominal output

voltages

note 3

40

−−

dB

residual carrier at CD outputs:

1

× subcarrier frequency

(peak-to-peak value)

−−

10

mV

2

× subcarrier frequency

(peak-to-peak value)

note 4

−−

30

mV

H/2 content at R-Y output at nominal input

signal (peak-to-peak value)

−−

10

mV

A

crosstalk between CD Channels

−40

−−

dB

output resistance (npn emitter follower)

−−

200

Ω

output current

−−−3mA

SECAM

colour difference output signals

independent of supply voltage; note 5

−(R-Y) output (peak-to-peak value)

0.95

1.05

1.15

V

−(B-Y) output (peak-to-peak value)

1.20

1.33

1.46

V

ratio of CD signal amplitudes V(R-Y)/(B-Y)

0.75

0.79

0.83

−

m

signal linearity at nominal output voltage

0.8

−−−