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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM2467 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM2467 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 43 page  LM1236 150 MHz I 2C Compatible RGB Preamplifier with Internal 254 Character OSD ROM, 512 Character RAM and 4 DACs General Description The LM1236 pre-amp is an integrated CMOS CRT preamp. It has an I 2C compatible interface which allows control of all the parameters necessary to directly setup and adjust the gain and contrast in the CRT display. Brightness and bias can be controlled through the DAC outputs, which are well matched to the LM2479 and LM2480 integrated bias clamp ICs. The LM1236 preamp is also designed to be compatible with the LM246x high gain driver family. Black level clamping of the video signal is carried out directly on the AC coupled input signal into the high impedance preamplifier input, thus eliminating the need for additional clamp capacitors. Horizontal and vertical blanking of the outputs is provided. Vertical blanking is optional and its duration is register programmable. The IC is packaged in an industry standard 24-lead DIP molded plastic package. Features n Internal 254 character OSD ROM usable as either (a) 190 2-color plus 64 4-color characters, (b) 318 2-color characters, or (c) some combination in between n Internal 512 character RAM, which can be displayed as one single or two independent windows n Enhanced I 2C compatible microcontroller interface to allow versatile Page RAM access n OSD Window Fade In/Fade Out n OSD Half Tone Transparency n OSD override allows OSD messages to override video and the use of burn-in screens with no video output. n 4 DAC outputs (8-bit resolution) for bus controlled CRT bias and brightness n Spot killer which blanks the video outputs when V CC falls below the specified threshold n Suitable for use with discrete or integrated clamp, with software configurable brightness mixer n 4-Bit Programmable start position for internal Horizontal Blanking n Horizontal blanking and OSD synchronization directly from deflection signals. The blanking can be disabled, if desired. n Vertical blanking and OSD synchronization directly from deflection signals. The blanking width is register programmable and can be disabled, if desired. n Power Saving Mode with 65% power reduction n Matched to LM246x driver and LM2479/80 bias IC’s Applications n Low end 15" and 17" bus controlled monitors with OSD n 1024x768 displays up to 85 Hz requiring OSD capability n Very low cost systems with LM246x driver PRELIMINARY September 2003 © 2005 National Semiconductor Corporation DS200757 www.national.com |
Số phần tương tự - LM2467 |
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Mô tả tương tự - LM2467 |
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