TDA4510/V9 데이터 시트보기 (PDF) - Philips Electronics

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TDA4510/V9

PAL decoder

Philips Electronics 

Philips Semiconductors

PAL decoder

Product specification

TDA3561A

Data blanking (pin 9)

Input voltage for no data insertion

Input voltage for data insertion

Maximum input voltage

Delay of data blanking

Input current

Input impedance

Suppression of the internal RGB signals

V9-27

< 0,4

V

V9−27

> 0,9

V

V9−27

<3

V

td

< 20

ns

I9

< 35

µA

Z9-27

typ. 10

kΩ

when V9−27 > 0,9 V

> 46

dB

Sandcastle input (pin 8)

Level at which the RGB blanking

is activated

typ. 1,5

V

V8-27

1 to 2

V

Level at which burst gating and

clamping pulse are separated

typ. 7,0

V

V8-27

6, 5 to 7,5

V

Delay between black level clamping and

burst gating pulse

Input current for:

td

typ. 0,4

µs

V8-27 = 0 to 1 V

V8-27 = 1 to 8,5 V

V8-27 = 8,5 to 12 V

−I8

<1

mA

I8

typ. 20

µA

I8

<2

mA

Notes to the characteristics

1. Signal with the negative-going sync; amplitude includes sync pulse amplitude.

2. Indicated is a signal for a colour bar with 75% saturation, so chrominance to burst ratio is 2,2 : 1.

3. Nominal contrast is specified as the maximum contrast −3 dB and nominal saturation as the maximum saturation

−6 dB.

4. All frequency variations are referred to the 4,4 MHz carrier frequency.

5. For ± 400 Hz deviation of the oscillator frequency.

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

7. When this level is exceeded, the amplitude of the output signal is reduced via a discharge of the capacitor at pin 7

(contrast control). The start of the peak white limiting action has a delay of one line period.

8. The variation of the black level depends directly on the gain of each channel during brightness control in the three

channels. As a consequence, the black levels at the outputs (for output levels above or below 3 V) can have a

difference which exceeds 200 mV. Because the amplitude and the black level change with brightness control have

a direct relationship, no discolouring can occur, caused by adjustment of contrast and brightness.

9. This difference occurs when the source impedance of the data signal inputs is 150 Ω and the black level clamp pulse

duration is 4 µs (sandcastle pulse). A lower difference is obtained when the impedance is lower.

10. Cross-coupling is measured under the following condition. Input signals nominal, contrast and 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 output signal at that output.

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

September 1982

8

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