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LM1282 Folha de dados(PDF) 10 Page - National Semiconductor (TI) |
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LM1282 Folha de dados(HTML) 10 Page - National Semiconductor (TI) |
10 / 14 page Pin Descriptions Pin Pin Schematic Description No. Name 1 2 3 Red OSD Input Green OSD Input Blue OSD Input These inputs accept standard TTL inputs. Each color is either fully on (logic high) or fully off (logic low). Connect unused pins to ground with a 47k resistor. 4 Video/OSD Switch This input accepts a standard TTL input. H = OSD L = Video Connect to ground with a 47k resistor when not using OSD. 5 8 11 Red Video In Green Video In Blue Video In Video inputs. These inputs must be AC Coupled with a minimum of a 1 µF cap, 10 µF is perferred. DC restoration is done at these inputs. A series resistor of about 33 Ω should also be used. 6 9 V CC1 Power supply pins (excluding output stage) 7 10 21 Ground Ground pins. All grounds are internally connected and must also be connected on the PCB. 12 V REF Pin used for additional filter capacitor to internal reference. The voltage at this pin is 2.0V. 13 14 26 27 28 Video Contrast OSD Contrast Blue Drive Green Drive Red Drive Contrast control pins: 4V — no attenuation 0V — over 60 dB attenuation Drive control pins: 4V — no attenuation 0V — 12 dB attenuation 15 16 Clamp Gate Blank Gate Both pins accept TTL inputs and are active low. The clamp gate provides DC restoration of the video signal. The blank gate forces the video outputs to below 200 mV. 17 19 24 Blue Clamp Cap Green Clamp Cap Red Clamp Cap The external clamp cap is charged and discharged to the correction voltage needed for DC restoration. 0.1 µF is the recommended value. www.national.com 10 |
Nº de peça semelhante - LM1282 |
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Descrição semelhante - LM1282 |
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