MAX4397_V01 datasheet(1/30 Pages) MAXIM

Part #	MAX4397

Description	Audio/Video Switch for Dual SCART Connectors

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Manufacturer	MAXIM [Maxim Integrated Products]

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General Description

The MAX4397 dual SCART switch matrix routes audio

and video signals between an MPEG encoder and two

external SCART connectors under I2C control, and

meets the requirements of EN50049-1, IEC 933-1,

Canal+, and BSkyB standards.

The video and audio channels feature input source

selection multiplexers, input buffers, and output buffers

for routing all inputs to selected outputs. The MAX4397D

audio encoder input is differential DC-coupled, while the

MAX4397S audio encoder input is single-ended AC-

coupled. Except for the MAX4397D’s audio encoder

input, all other inputs and outputs are AC-coupled with

internal DC-biasing set to predefined levels.

The MAX4397 provides programmable gain control from

+5dB to +7dB in 1dB steps for Red, Green, and Blue

component video signals. All other video outputs have a

fixed +6dB gain. Additional features include an internal

Luma and Chroma (Y/C) mixer that generates a

Composite video signal (CVBS) to supply an RF

modulator output, and internal video reconstruction low-

pass filters with passband ripple between -1dB and

+1dB from 100kHz to 5.5MHz. The MAX4397 TV audio

channel features clickless switching and programmable

volume control from -56dB to +6dB in 2dB steps. The

VCR audio output also has programmable gain for

-6dB, 0dB, or +6dB. The device also generates

monaural audio from left and right stereo inputs.

All audio drivers deliver a 3.0VRMS minimum output.

The MAX4397 operates with standard 5V and 12V

power supplies and supports slow-switching and fast-

switching signals. The I2C interface programs the gain

and volume control, and selects the input source

for routing.

The MAX4397 is available in a compact 48-pin thin QFN

package and is specified over the 0°C to +70°C com-

mercial temperature range.

Applications

Satellite Set-Top Boxes

Cable Set-Top Boxes

TVs

VCRs

DVDs

Features

♦ Video Outputs Drive 2VP-P into 150Ω

♦ Audio Outputs Drive 3VRMS into 10kΩ

♦ Clickless, Popless Audio Gain Control

and Switching

♦ AC-Coupled Video Inputs with Internal Clamp

and Bias

♦ DC-Coupled Video Outputs

♦ Composite Video Signal Created Internally from

Y/C Inputs

♦ Internal Video Reconstruction Filters Provide

-40dB at 27MHz

♦ Differential (MAX4397D) or Single-Ended

(MAX4397S) Audio Encoder Input

♦ Red/Chroma Switch for Bidirectional I/O

♦ I2C-Programmable RGB Gain from +5dB to +7dB

♦ I2C-Programmable Audio Gain Control from +6dB

to -56dB

♦ Meets EN50049-1, IEC 933-1, Canal+, and BSkyB

Requirements

Audio/Video Switch for Dual SCART Connectors

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

19-3618; Rev 3; 5/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Pin Configuration and Typical Application Circuits appear at

end of data sheet.

System Block Diagram appears at end of data sheet.

EVALUATION

KIT

AVAILABLE

PART

TEMP

RANGE

PIN-PACKAGE

PKG

CODE

MAX4397DCTM

0°C to +70°C

48 Thin QFN-EP*

(7mm x 7mm)

T4877-6

MAX4397SCTM

0°C to +70°C

48 Thin QFN-EP*

(7mm x 7mm)

T4877-6

*EP = Exposed paddle.

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