Overview

The LA7577N is a high tone quality and high picture quality, video IF and sound IF IC. It employs split processing

of the video IF signal and sound IF signal using SAW filters and a PLL detector. Further, the PLL detector incorpo

rates a buzz canceler for Nyquist buzz interference suppression to achieve high tone quality.

Features

• Employs split processing for wide bandwidth video characteristics

• PLL detector with buzz canceler for excellent buzz and buzz beat characteristics

• APC time constant switch built-in

• High-speed AGC supports double time constant method

• SIF carrier level AGC in the 1st SIF stage for good SIF weak electric field characteristics

• Good differential gain and phase characteristics

• RF AGC easily adjusted using a variable resistor