General Description

The MAX9511 provides a complete VGA interface

between a graphics controller and/or docking station.

The MAX9511 has output drivers with variable electro-

magnetic interference (EMI) suppression for graphics

video and sync (RGBHV) signals and includes external

load-detection circuitry.

The MAX9511 suppresses EMI emissions by limiting

the slew rate (SR) rather than limiting bandwidth with

fixed L-C filters. The SR controls the large-signal band-

width without affecting the small-signal bandwidth,

resulting in sharper video images, while reducing EMI.

The SR of the MAX9511 provides tighter control than

traditional passive L-C components, and allows the SR

to track the resolution by varying an external resistor

The load-detection circuitry of the MAX9511 automatically

detects and transmits a change in load status to the input

stages when an external load (monitor, docking station, or

projector) is connected. The MAX9511 is compatible with

the load-detection circuitry on the digital-to-analog (DAC)

outputs of most video graphics controllers. The output

drivers provide 6dB of gain to compensate for the 75Ω

back-termination resistors, which reduce transmission line

reflections.

The RGBHV channels can be placed into shutdown to

reduce power when no external load is connected.

The MAX9511 operates from 3V and 5V supplies. The

DDC circuitry performs bidirectional level translation

from 3V to 5V logic levels. The MAX9511 is offered in a

24-pin QSOP package and is specified over the com-

mercial 0°C to +70°C temperature range.

Applications

Notebook PCs (Laptops)

Docking Stations

Graphics Cards for Notebooks and Personal

Computers

Personal Computer Motherboards with On-Board

Video Graphics Controllers

Workstations

Features

♦ RGB Drivers with Adjustable Slew Rate for EMI

Control

♦ H Sync and V Sync Drivers with Level Translation

♦ Bidirectional Level Translators for DDC Support

♦ Simultaneously Drives External Monitor/Projector

and Docking Station without Analog RGB

Switches—No Stub Reflections

♦ Eliminates Up to 34 External Components

♦ Small 24-Pin QSOP Package

RGBHV Driver with EMI Suppression

________________________________________________________________ Maxim Integrated Products

1

19-3669; Rev 3; 8/07

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.

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX9511CEG

0°C to +70°C

24 QSOP

E24-2

MAX9511CEG+

0°C to +70°C

24 QSOP

E24-2

RED_OUT

RED_IN

MAX9511

EMI SUPPRESSION

LOAD-DETECT CIRCUITRY

GREEN_OUT

GREEN_IN

BLUE_OUT

BLUE_IN

H_SYNC_OUT

H_SYNC_IN

V_SYNC_OUT

V_SYNC_IN

DDC_DATA_OUT

DDC_DATA_IN

DDC_CLK_OUT

DDC_CLK_IN

Simplified Block Diagram

Pin Configuration appears at end of data sheet.