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MC13282A Scheda tecnica(PDF) 5 Page - Motorola, Inc |
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MC13282A Scheda tecnica(HTML) 5 Page - Motorola, Inc |
5 / 12 page MC13282A 5 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION (continued) Pin Description Equivalent Internal Circuit Name 14 Fast Commutate VCC 40 k 20 k This pin is used in conjunction with the RGB OSD inputs. It is a high speed switch used for overlaying text on picture. A logic low selects Pins 2, 4, 6. A logic high selects Pins 8, 10, 12. 15 B Emitter Output VCC Vid The video outputs are configured as emitter–followers with a driving capability of about 15 mA each. The dc voltage at these three emitters is set to 1.2 V 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 stage is determined by the emitter resistors (typically 330 Ω). 22 R Emitter Output RE = 330 Typical Contrast by the emitter resistors (typically 330 Ω). 16 B Clamp Capacitor 1.2 V Video Out A 100 nF capacitor is connected to each of these pins. The capacitor is used for video output dc restoration. 18 G Clamp Capacitor VCC 21 R Clamp Capacitor 17 Video VCC Connect to 8.0 V dc supply, ±5%. This VCC is for the video output stage. It is internally connected to the collectors of the output transistors. 20 5.0 Vref (V5) VCC Band Gap Regulator 5.0 V 10 µF 0.8 R R 5.0 V regulator. Minimum 10 µF capacitor is required for noise filtering and compensation. It can source up to 20 mA but not sink current. Output impedance is ≈ 10 Ω. Recommended for use as a voltage reference only. |
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