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TDA3566A 数据表(PDF) 7 Page - NXP Semiconductors |
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TDA3566A 数据表(HTML) 7 Page - NXP Semiconductors |
7 / 24 page February 1994 7 Philips Semiconductors Product specification PAL/NTSC decoder TDA3566A Data insertion Each colour amplifier has a separate input for data insertion. A 1 V peak-to-peak input signal provides a 3.8 V peak-to-peak output signal. To avoid the black-level of the inserted signal differing from the black level of the normal video signal, the data is clamped to the black level of the luminance signal. Therefore AC coupling is required for the data inputs. To avoid a disturbance of the blanking level due to the clamping circuit, the source impedance of the driver circuit must not exceed 150 Ω. The data insertion circuit is activated by the data blanking input (pin 9). When the voltage at this pin exceeds a level of 0.9 V, the RGB matrix circuits are switched off and the data amplifiers are switched on. To avoid coloured edges, the data blanking switching time is short. The amplitude of the data output signals is controlled by the contrast control at pin 6. The black level is equal to the video black level and can be varied between 2 and 4 V (nominal condition) by the brightness control voltage at pin 11. Non-synchronized data signals do not disturb the black level of the internal signals. Blanking of RGB and data signals Both the RGB and data signals can be blanked via the sandcastle input (pin 7). A slicing level of 1.5 V is used for this blanking function, so that the wide part of the sandcastle pulse is separated from the remainder of the pulse. During blanking a level of +1 V is available at the output. To prevent parasitic oscillations on the third overtone of the crystal the optimum tuning capacitance should be 10 pF. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). THERMAL RESISTANCE SYMBOL PARAMETER MIN. MAX. UNIT VP supply voltage (pin 1) − 13.2 V Ptot total power dissipation − 1700 mW Tamb operating ambient temperature −25 +70 °C Tstg storage temperature −25 +150 °C SYMBOL PARAMETER THERMAL RESISTANCE Rth j-a from junction to ambient in free air 40 K/W |
类似零件编号 - TDA3566A |
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类似说明 - TDA3566A |
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