TLH6753

February 1995

LMC835 Digital Controlled Graphic Equalizer

General Description

The LMC835 is a monolithic digitally-controlled graphic

equalizer CMOS LSI for Hi-Fi audio The LMC835 consists

of a Logic section and a Signal Path section made of analog

switches and thin-film silicon-chromium resistor networks

The LMC835 is used with external resonator circuits to

dB gain range and 25 steps each Only three digital inputs

are needed to control the equalization The LMC835 makes

it easy to build a mP-controlled equalizer

The signal path is designed for very low noise and distor-

tion resulting in very high performance compatible with

PCM audio

Features

Y

No volume controls required

Y

Three-wire interface

Y

14 bands 25 steps each

Y

g

Y

Low noise and distortion

Y

TTL CMOS logic compatible

Applications

Y

Hi-Fi equalizer

Y

Receiver

Y

Car stereo

Y

Musical instrument

Y

Tape equalization

Y

Mixer

Y

Volume controller

Connection Diagrams

Dual-In-Line Package

TLH6753 – 1

Top View

Order Number LMC835N

See NS Package N28B

Molded Chip Carrier Package

TLH6753 – 26

Top View

Order Number LMC835V

See NS Package V28A

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A