LM1886 Datasheet | National Semiconductor

Description The LM1886 is a TV video matrix D to A converter which encodes luminance and color difference signals from 3-bit red green and blue inputs The luminance output is encoded from the NTSC equation Y e 0 3R a 0 59G a 0 11B and the R-Y and B-Y outputs are weighted to prevent overmodulation A built-in R-Y and burst gate polarity switch allow European PAL patible signals to be encoded All output levels including an RF O Carrier Bias Voltage have been referenced to 5V for direct connection to the LM1889 TV video modulator When used in bination with the LM1889 and a suitable sync generator 3-bit R G and B information may be encoded to both posite video and RF channel carrier Features Y plete digital to RF coding with LM1889 Y 1-pin PAL NTSC mode select Y True NTSC matrix Y 8 levels of grey scale Y Allows wide range of colorimetry Y Low power TTL inputs Y Wideband luminance output Y Weighted R-Y B-Y outputs Connection Diagram Top View FIGURE 1 Order Number LM1886N See NS Package Number N20A TL H 7916 - 1 C1995 National Semiconductor Corporation TL H 7916 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Pin 5 Pin 20 15V 6V Input Voltage (Pins 1 8 9 11- 19) b0 5V a12V Pin 2 Voltage Relative to Pin 20 Output Current Power Dissipation TA e 25 C (Note 1) Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering 10 sec ) 0 8V 5 m A 1900 m W b55 C to a150 C 0 C to a70 C 260 Electrical Characteristics TA e 25 C (Figure 2 Note 2) Parameter Conditions Min Typ Max Units 5V Supply Current (Pin 20) BLANK e 0 8V 7 11 16 m A 12V Supply Current (Pin 5) BLANK e 0 8V 9 13 17 m A Logic ‘‘1’’ Input Current (Pins 1 2 8 9 11- 19) Input Voltage e 5 0V 0 10 m A Logic ‘‘0’’ Input Current (Pins 1 2 8 9 11- 19) Input Voltage e 0 3V b0 01 b0 18 m A Output Offsets DVY...