TDA4566

The TDA4566 from Philips is a monolithic integrated circuit specifically engineered for colour-transient improvement (CTI) and as a luminance delay line in colour television receivers. It utilizes a gyrator technique to achieve its functionality.

Key features include colour transient improvement for (R-Y) and (B-Y) colour difference signals, providing high transients at the output. It also incorporates a luminance signal path (Y) that replaces conventional Y-delay coils with an integrated Y-delay line. The device offers switchable delay times ranging from 550 ns to 820 ns, with additional fine adjustment capabilities of 37 ns. Two Y output signals are provided, one with a 180 ns less delay.

The TDA4566 operates within a supply voltage range of 10.8 V to 13.2 V, with a typical supply current of 35 mA. The Y-signal delay can be adjusted based on external resistor R14-18, influencing bandwidth. For a 1.2 kΩ resistor, the bandwidth is typically 5 MHz. The circuit is housed in an 18-lead DIL plastic package (SOT102).

This component is suitable for applications requiring precise colour transient handling and luminance delay in television systems. Its integrated design simplifies circuitry compared to discrete solutions.