LM1281N National Semiconductor, LM1281N Datasheet
LM1281N
Specifications of LM1281N
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LM1281N Summary of contents
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... Capable output swing (slight reduction in PP bandwidth) n Output stage directly drives most hybrid or discrete CRT drivers Applications n High resolution RGB CRT monitors requiring OSD capability @ −3 dB FIGURE 1. Order Number LM1281N See NS Package Number N28B April 1999 DS012355-1 www.national.com ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Pins 6, 9, and 22 Peak Video Output Source Current (Any One Amp) Pins 18, 20, and 23 Voltage at Any Input Pin ( Power Dissipation (P ...
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AC Electrical Characteristics = 25˚C, V See AC Test Circuit ( Figure for the AC test unless otherwise stated (Note 15) Symbol Parameter A Video Amplifier Gain V max A Contrast Attenuation @ 2V ...
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OSD Electrical Characteristics = 25˚C; V See DC Test Circuit ( Figure unless otherwise stated 0V Symbol Parameter V OSD Input Low Input Voltage OSDI V OSD Input High Input Voltage OSDh ...
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Typical Performance Characteristics Attenuation vs Contrast Voltage DS012355-2 LM1281 Crosstalk vs Frequency LM1281 Contrast vs Frequency = 12V 25˚C unless otherwise specified Attenuation vs Drive Voltage LM1281 Drive vs Frequency DS012355-4 DS012355-5 5 DS012355-3 DS012355-6 ...
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Timing Diagrams FIGURE 2. Blanking Propagation Delay and Rise/Fall Time FIGURE 3. Video to OSD, OSD to Video Propagation Delay and Switching Time www.national.com DS012355-7 DS012355-8 6 ...
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Timing Diagrams (Continued) FIGURE 4. OSD Propagation Delay and Rise/Fall Times Test Circuits FIGURE 5. LM1281 OSD Video Preamp DC Test Circuit DS012355-9 7 DS012355-10 www.national.com ...
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Test Circuits (Continued) FIGURE 6. LM1281 OSD Video Preamp AC Test Circuit www.national.com 8 DS012355-11 ...
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Test Circuits (Continued) FIGURE 7. LM1281 OSD Video Preamp Demonstration Board Schematic 9 DS012355-12 www.national.com ...
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Pin Descriptions Pin No. Pin Name 1 Red OSD Input 2 Green OSD Input 3 Blue OSD Input 4 Video/OSD Switch 5 Red Video In 8 Green Video In 11 Blue Video CC1 9 7 Ground 10 ...
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Pin Descriptions (Continued) Pin No. Pin Name 18 Blue Video Out 20 Green Video Out 23 Red Video Out 22 V CC2 25 RGB Cutoff Adjust Functional Description Figure 1 on the front page shows the block diagram of the ...
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Functional Description couple the preamp output to the cathode drivers. Therefore only one cutoff adjustment is provided, this is used primarily to optimize the operation of the cathode drivers. Note that the Blank and Clamp Gates are active low. These ...
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... References Zahid Rahim, “Guide to CRT Video Design,” Application Note 861, National Semiconductor Corp., Jan. 1993 Ott, Henry W. Noise Reduction Techniques in Electronic sys- tems , John Wiley & Sons, New York, 1976 13 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...