TLH5079

December 1994

LM2889 TV Video Modulator

General Description

The LM2889 is designed to interface audio and video sig-

nals to the antenna terminals of a TV receiver It consists of

a sound subcarrier oscillator and FM modulator video

clamp and RF oscillators and modulators for two low-VHF

channels

The LM2889 allows video information from VTRs video disk

systems games test equipment or similar sources to be

displayed on black and white or color TV receivers

Features

Y

Pin for pin compatible with LM1889 RF section

Y

Low distortion FM sound modulator (less than 1%

THD)

Y

Video clamp for AC-coupled video

Y

Low sound oscillator harmonic levels

Y

10V to 16V supply operation

Y

DC channel switching

Y

Excellent oscillator stability

Y

Low intermodulation products

DC Test Circuit

TLH5079 – 1

Order Number LM2889N

See NS Package Number N14A

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A