TDA8376

GENERAL DESCRIPTION

The TDA8376 and TDA8376A are alignment-free I 2 C-bus controlled video processors which contain a PAL/NTSC colour decoder, luminance processor, sync processor, RGB-control and deflection processor. The circuits have been designed for use with the baseband chrominance
delay line TDA4665 and for DC-coupled vertical and East-West (E-W) output stages. Both ICs are pin compatible. The TDA8376A has a flexible horizontal and vertical zoom possibility for 16 : 9 applications.

FEATURES

• Source selection with 2 CVBS inputs and a Y/C (or extra CVBS) input
• Output signals of the video switch circuit for the teletext decoder and a Picture-In-Picture (PIP) processor
• Video identification circuit which is independent of the synchronization for stable On Screen Display (OSD) under ‘no-signal’ conditions
• Integrated chrominance trap with pre-shoot compensation and bandpass filters (automatically
calibrated)
• Integrated luminance delay line
• Asymmetrical peaking in the luminance channel with a (defeatable) noise coring function
• Black stretcher circuit in the luminance channel
• PAL/NTSC colour decoder with automatic search system
• Easy interfacing with the TDA8395 (SECAM decoder) for multistandard applications
• RGB control circuit with black-current stabilization and white point adjustment; to obtain a good grey scale tracking the black-current ratio of the 3 guns depends on the white point adjustment
• Two linear RGB inputs and fast blanking
• Horizontal synchronization with two control loops and alignment-free horizontal oscillator
• Vertical count-down circuit
• Geometry correction by modulation of the vertical and E-W drive
• Vertical and horizontal zoom possibility for 16 : 9 applications (TDA8376A only)
• I2C-bus control of various functions
• Low dissipation (700 mW)
• Small amount of peripheral components compared with competition ICs
• Y, U and V inputs and outputs.