TDA956xH Datasheet | Philips Semiconductors

DESCRIPTION The various versions of the TDA955X/6X/8X H/N1 series bine the functions of a video processor together with a µ-Controller and US Closed Caption decoder. Most versions have a Teletext decoder on board. The Teletext decoder has an internal RAM memory for 1or 10 page text. The ICs are intended to be used in economy television receivers with 90° and 110° picture tubes. .. The ICs have supply voltages of 8 V and 3.3 V and they are mounted in a QFP 80 envelope. The features are given in the following feature list. The differences between the various ICs are given in the table on page 4. FEATURES TV-signal processor - Multi-standard vision IF circuit with alignment-free PLL demodulator - Internal (switchable) time-constant for the IF-AGC circuit - The QSS and mono FM functionality are both available so that an FM/AM TV receiver can be built without the use of additional ICs - The mono intercarrier sound circuit has 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. - The FM-PLL demodulator can be set to centre frequencies of 4.74/5.74 MHz so that a second sound channel can be demodulated. In such an application it is necessary that an external bandpass filter is inserted. - The vision IF and mono intercarrier sound circuit can be used for the demodulation of FM radio signals - Video switch with 2 external CVBS inputs and a CVBS output. One of the CVBS inputs can be used as Y/C input. - 2 external audio inputs. The selection of the various inputs is coupled to the selection of the CVBS signals - Integrated chrominance trap circuit - Integrated luminance delay line with adjustable delay time - Switchable group delay correction in the CVBS path - Picture improvement features with peaking (with switchable centre frequency, depeaking, variable positive/negative overshoot ratio and video dependent coring), dynamic...