TDA 937X-PS-N2 ICs_ UOC CHASSIS _ DATA _ Pin Functions

GENERAL DESCRIPTION

     The various versions of the TDA937X PS/N2 series combine the functions of a video processor together with a μ-Controller and US Closed Caption decoder. The ICs are intended to be used in economy television receivers with 90° and 110° picture tubes.  The ICs have supply voltages of 8V and 3.3V and they are mounted in an S-DIP 64 envelope.

FEATURES

• Multi-standard vision IF circuit with alignment-free PLL demodulator.
• Internal (switchable) time-constant for the IF-AGC circuit.
• A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier.
• The mono intercarrier sound versions have a selective FM-PLL demodulator which can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz).  The quality of this system is such that the external band-pass filters can be omitted.
• Source selection between ‘internal’ CVBS and external CVBS or Y/C signals.
• Integrated chrominance trap circuit.
• Integrated luminance delay line with adjustable delay time.
• Picture improvement features with peaking (with variable positive/negative overshoot ratio), black stretching and Dynamic Skin Tone Control.
• Integrated chroma band-pass filter with switchable centre frequency.
• Only one reference (12 MHz) crystal required for the μ-Controller, Teletext- and the colour decoder.
• PAL/NTSC colour decoder with automatic search system.
• Internal base-band delay line.
• RGB control circuit with ‘Continuous Cathode Calibration’, white point and black level offset adjustment so that the colour temperature of the dark and the light parts of the screen can be chosen independently.
• Linear RGB or YUV input with fast blanking for external RGB/YUV sources. The Text/OSD signals are internally supplied from theμ-Controller/Teletext decoder.
• Contrast reduction possibility during mixed-mode of OSD and Text signals.
• Horizontal synchronization with two control loops and alignment-free horizontal oscillator.
• Vertical count-down circuit.
• Vertical driver optimized for DC-coupled vertical output stages.
• Horizontal and vertical geometry processing.
• Horizontal and vertical zoom function for 16 : 9 applications.
• Horizontal parallelogram and bow correction for large screen picture tubes.
• Low-power start-up of the horizontal drive circuit.

PIN CONFIGURATION

  Click on image.  Right click on the enlarged image, save image as, to a folder (My document > My  Pictures).  View it in ‘Picasa’ picture viewer.  There you can enlarge it more.  Download ‘Picasa-3’ by Google site, and install it to your system.  It’s a  free software from Google and download it by Google official website.