TDA4681 Overview
plastic dual in-line package; 28 leads (600 mil) plastic leaded chip carrier; 28 leads GENERAL DESCRIPTION TDA4681 The TDA4681 is a monolithic integrated circuit with a colour difference interface for video processing in TV receivers.
TDA4681 Key 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 fully-controlled, analog RGB inputs, selected either by fast switch signals or via I2C-bus
- Saturation, contrast and brightness 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, horizontal and vertical synchronizatio
- Automatic cut-off control with picture tube leakage current pensation
- Software-based automatic white level control or fixed white levels via I2C-bus
- Cut-off and white level measurement pulses in the last 4 lines of the vertical blanking interval (I2C-bus selection for
- Increased RGB signal bandwidths for progressive scan and 100 Hz operation (selected via I2C-bus)