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MC13281AP Datenblatt(PDF) 4 Page - Motorola, Inc |
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MC13281AP Datenblatt(HTML) 4 Page - Motorola, Inc |
4 / 12 page MC13280AY MC13281A/B 4 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION MC13280AY MC13281B Pin MC13281A Pin Name Equivalent Internal Circuit Description 1 1 R Subcontrast Control VCC These pins provides a maximum of 26 dB attenuation to vary the gain of each video amplifier separately. 3 3 G Subcontrast Control 5.0 V 50 k Input voltage is from 0 to 5.0 V. Increasing the voltage will increase the contrast level. 5 5 B Subcontrast Control 2 2 R Input 5.0 V Vref Cl The input coupling capacitor is used for input clamping storage. The maximum source impedance is 100 Ω. I t l it f th id i l i 4 4 G Input 5.0 V 10 k 10 k Clamp 75 Ω 0.1 Input polarity of the video signal is positive. Nominal 0.7 Vpp input signal is recommended (maximum 1 0 Vpp) 6 6 B Input 1.0 k 10 k recommended (maximum 1.0 Vpp). 7 7 Ground Ground pin. Connect to a clean, solid ground. N/A 8 N/C Connected to ground. 10 N/C 11 N/C 12 N/C 8 9 VCC Connect to 8.0 Vdc supply, ±5%. Decoupling is required at this pin. 9 13 Contrast 2.5 V 42 k 5.0 V 2.0 k Overall Contrast Control for the three channels. The input range is 0 V to 5.0 V. An increase of voltage increases the contrast. 10 14 Fast Commutate Must be connected to ground. 11 15 B Emitter Output VCC Video The video outputs are configured as emitter–followers with a driving capability of about 15 mA each. 15 19 G Emitter Output RE = 330 Video Signal Contrast The dc voltage at these three emitters is set to 1.2 V (black level). The dc current through the output 18 22 R Emitter Output RE = 330 Typical Contrast The dc current through the output stage is determined by the emitter resistors (typically 330 Ω). |
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