TDA3561A

The Philips TDA3561A is a specialized integrated circuit designed for decoding the PAL colour television standard. It integrates all necessary functions for identifying and demodulating PAL signals, along with a luminance amplifier and an RGB-matrix amplifier.

This device can supply output signals up to 5 V peak-to-peak, enabling direct drive of discrete output stages. It also includes separate inputs for data insertion, supporting text display systems like Teletext, channel number displays, and broadcast Antiope. Key features include a peak white limiter, brightness control via a variable pulse in the luminance channel, and improved suppression of internal and external RGB signals.

The TDA3561A operates with a typical supply voltage of 12 V and a supply current of 85 mA. It accepts luminance input signals up to 0.45 V peak-to-peak and chrominance input signals between 55 and 1100 mV peak-to-peak. The RGB outputs provide up to 5.25 V peak-to-peak at nominal contrast and saturation. The contrast control range is typically 20 dB, and the saturation control range is a minimum of 50 dB.

Packaged in a 28-lead DIP, the TDA3561A is suitable for various television and video applications requiring PAL signal decoding.