MAX9598 Maxim Integrated Products, MAX9598 Datasheet

MAX9598

Manufacturer Part Number

MAX9598

Description

Low-Power Audio/Video Switch

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9598.pdf (35 pages)

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Part Number:

MAX9598CTL+

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The MAX9598 dual SCART matrix routes audio and video

signals between a set-top box decoder chip and two

external SCART connectors under I

from a 3.3V supply and a 12V supply, the MAX9598 con-

sumes 70mW during quiescent operation and 471mW

during average operation when driving typical signals into

typical loads. Video input detection, video load detection,

and a 1.7mW low-power mode facilitate the design of low-

power set-top boxes.

The MAX9598 audio section contains a buffered cross-

point to route audio inputs to audio outputs. The

DirectDrive™ output amplifiers create a 2V

scale audio signal biased around ground, eliminating

the need for bulky output capacitors and reducing

click-and-pop noise. The zero-cross detection circuitry

also further reduces clicks and pops by enabling audio

sources to switch only during a zero-crossing.

The MAX9598 video section contains a buffered cross-

point to route video inputs to video outputs. The standard-

definition video signals from the set-top box decoder chip

are lowpass filtered to remove out-of-bandwidth artifacts.

The MAX9598 also supports slow-switching and fast-switch-

ing signals. An interrupt signal from the MAX9598 informs the

microcontroller (µC) when the system status has changed.

The MAX9598 is available in a compact 40-pin thin QFN

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

cial temperature range.

19-3209; Rev 0; 2/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

STB CHIP

ENCODER

STEREO

AUDIO

VIDEO

________________________________________________________________ Maxim Integrated Products

DAC

μC

General Description

INTERRUPT OUTPUT

RGB, Y/C, CVBS

SINGLE-ENDED

STEREO AUDIO

Low-Power Audio/Video Switch for

C control. Operating

RMS

12V

V12

full-

AUDIO CROSSPOINT

VIDEO FILTERS AND

SLOW SWITCHING

FAST SWITCHING

C INTERFACE AND

WITH DirectDrive

CHARGE PUMP

CROSSPOINT

3.3V

MAX9598

REGISTERS

OUTPUTS

VVID

Dual SCART Connectors

o 70mW Quiescent Power Consumption

o 1.7mW Low-Power Mode Consumption

o 0.1mW Shutdown Consumption

o Clickless/Popless, DirectDrive Audio

o Video Input Detection

o Video Load Detection

o Video Reconstruction Filter with 10MHz Passband

o 3.3V and 12V Supply Voltages

+ Denotes a lead-free package.

* EP = Exposed pad.

MAX9598CTL+

GNDVID

3.3V

and 52dB Attenuation at 27MHz

VAUD

PART

Set-Top Boxes

TVs

DVD Players

SLOW SWITCHING

FAST SWITCHING

RGB, Y/C, CVBS

TEMP RANGE

0°C to +70°C

L/R AUDIO

Y/C, CVBS

L/R AUDIO

CVBS

System Block Diagram

Ordering Information

PIN-PACKAGE

40 TQFN-EP*

SCART

VCR

Applications

Features

T4066+3

CODE

PKG

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