Part Number: TDA9381PS, TDA9381
Function: TV signal processor
Package: DIP 64 Pin type
Manufacturer: Philips Semiconductor
Images:
Description
TDA9381PS is TV signal processor-Teletext decoder with embedded µ-Controller. A TV signal processor with a Teletext decoder is a component or module within a television that is responsible for processing incoming television signals and extracting Teletext data from those signals. Teletext is a text-based information and graphics service that can be transmitted alongside television broadcasts, providing viewers with additional information, news, weather updates, program listings, and more.
The various versions of the TDA9381PS series combine the functions of a TV signal 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.
Features
1. Multi-standard vision IF circuit with alignment-free PLL demodulator
2. Internal (switchable) time-constant for the IF-AGC circuit
3. A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier.
4. 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.
5. Source selection between ‘internal’ CVBS and external CVBS or Y/C signals
6. Integrated chrominance trap circuit
7. Integrated luminance delay line with adjustable delay time