NXP Semiconductors TDA4685
The TDA4685 is a monolithic integrated circuit with a luminance and a colour difference interface for video processing in TV receivers. Its primary function is to process the luminance and colour difference signals from a colour decoder which is equipped e.g. with the multistandard decoder TDA4655 or TDA9160 plus delay line TDA4661 and the Picture Signal Improvement (PSI) IC, TDA467X, or from a feature module.| Part No. | TDA4685 |
|---|---|
| Datasheet | TDA4685 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Video processor |
| Buy | Stock & Price |
FEATURES
● Operates from an 8 V DC supply● Black level clamping of the colour difference, luminance and RGB input signals with coupling-capacitor DC level storage
● Two analog RGB inputs, selected either by fast switch signals or via I2C-bus; brightness and contrast control of both RGB inputs
● Saturation, contrast, brightness and white adjustment via I2C-bus
● Same RGB output black levels for Y/CD and RGB input signals
● Timing pulse generation from either a 2 or 3-level sandcastle pulse for clamping, vertical synchronization and cut-off timing pulses
● Automatic cut-off control or clamped output selectable via I2C-bus
● Automatic cut-off control with picture tube leakage current compensation
● Cut-off measurement pulses after end of the vertical blanking pulse or end of an extra vertical flyback pulse
● Two switch-on delays to prevent discolouration before steady-state operation
● Average beam current and peak drive limiting
● PAL/SECAM or NTSC matrix selection via I2C-bus
● Emitter-follower RGB output stages to drive the video output stages
● I2C-bus controlled DC output e.g. for hue-adjust of NTSC (multistandard) decoders.
