April 1986

8

Philips Semiconductors

Product specification

PAL decoder

TDA3565

Notes to the characteristics

1. At nominal contrast and nominal brightness.

2. Signal with negative-going sync pulse, amplitude includes sync pulse amplitude.

3. The signal indicated is for a colour bar with 75% saturation, so the chroma burst ratio of 2,2 : 1.

4. Nominal contrast is defined as (maximum contrast

−3 dB) and nominal saturation is (maximum saturation −12 dB).

5. Cross coupling is measured under the following condition; input signals nominal and contrast/saturation such that

nominal output signals are obtained. The signals at the output at which no signal should be available must be

compared with the nominal signal at that output.

6. The signal-to-noise ratio is specified as peak-to-peak signal with respect to r.m.s. noise.

7. These signal amplitudes are determined by the a.c.c. circuit of the reference part.

8. When this level is exceeded the amplitude of the output signal is reduced via a discharge of the capacitor at pin 6

(contrast control). The discharge current is 5,5 mA.

Frequency response of total luminance/

RGB amplifier circuits for 0 to 5 MHz

−−

−3dB

Sandcastle pulse detector

Level at which RGB blanking is activated

1,0

1,5

2,0

V

Level at which burst gate and clamping

pulse are separated

6,5

7,0

7,5

V

Delay between black level clamping and

burst gating pulse

−

0,4

−µs

Input current at:

−−

−1mA

−

20

40

µA

−−

2mA

PARAMETER

SYMBOL

MIN.

TYP.

MAX.

UNIT