MAX3845 Maxim Integrated Products, MAX3845 Datasheet

MAX3845

Manufacturer Part Number

MAX3845

Description

DVI/HDMI 2:4 TMDS Fanout Switch and Cable Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX3845.pdf (19 pages)

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The MAX3845 is a TMDS

cable driver for multimonitor distribution of DVI™ or

HDMI™ signaling up to 1.65Gbps. Both inputs and out-

puts are standard TMDS signaling as per DVI and HDMI

standards. Because TMDS links are “point-to-point,”

buffering is required for fanout applications.

Four DVI/HDMI TMDS outputs are provided for fanout

distribution. Each TMDS output can be independently

sourced from either input or can be turned off. Each

TMDS input or output is composed of four differential

channels that can be arbitrarily assigned to the three

data signals and the 1/10th-rate clock. The data rate

depends on resolution, but it can vary from 250Mbps

(VGA) to 1.65Gbps (UXGA or 1080p/60).

Typical applications include multiroom display of the

same video source or industrial/commercial signage

applications such as airport monitors or trading room

floor displays. The MAX3845 includes selectable output

preemphasis that extends output cable reach up to an

additional 7m.

For DDC switching, use the companion MAX4814E* 2:4

low-resistance CMOS crosspoint switch. DDC switching

is not required for applications that connect DDC to one

reference monitor only.

The MAX3845 can be configured to create a 2 x 8 or

4 x 4 switch (see the Typical Operating Circuit diagrams).

The MAX3845 is available in a 14mm × 14mm, 100-pin

TQFP-EP package and operates over the -10°C to

+85°C temperature range.

19-0798; Rev 0; 4/07

Pin Configuration appears at end of data sheet.

TMDS is a registered trademark of Silicon Image, Inc.

DVI is a trademark of Digital Display Working Group.

HDMI is a trademark of HDMI Licensing, LCC.

*Future product—contact factory for availability.

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.

Digital Signage and Industrial Display

PC Monitor Distribution

Home A/V Receivers

DVI/HDMI Distribution Amplifiers

DVI/HDMI Crosspoint Switches

________________________________________________________________ Maxim Integrated Products

DVI/HDMI 2:4 TMDS Fanout Switch and

General Description

2-to-4 fanout switch and

Applications

♦ Two DVI/HDMI TMDS-Compatible Inputs and Four

♦ Save Power by Turning Off Unused Outputs

♦ Each Output Independently Selects Input 1 or

♦ Three Preemphasis Settings Extend Cable Reach

♦ Operation Up to 1.65Gbps

♦ 14mm x 14mm, 100-Pin TQFP Package with

♦ 3.3V Power Supply

♦ TMDS Data (x3) and Clock (x1) Can Be Arbitrarily

+ Denotes a lead-free package.

EP = Exposed pad.

MAX3845UCQ+

Typical Operating Circuits continued at end of data sheet.

VIDEO SOURCE 1

VIDEO SOURCE 2

DVI/HDMI TMDS-Compatible Outputs

Input 2

Up to 7m

Exposed Paddle for Heat Sinking

Assigned to the Four Identical Switched Paths (A,

B, C, and D)

PART

CONTROL

SIGNALS

2:4 FANOUT/SWITCH APPLICATION

Typical Operating Circuit

IN_SEL[1:4]

PREEMPH[1:4]

-10°C to +85°C 100 TQFP-EP

TEMP RANGE PIN-PACKAGE

SWITCH x5

2:4 CMOS

FANOUT SWITCH AND

2:4 DVI/HDMI TMDS

CABLE DRIVER

Ordering Information

MAX3845

Cable Driver

DDC DATA, DDC CLK,

HOTPLUG, 5V, GND, (CEC)

HOTPLUG[1:4]

BUFFER

OUTPUT TO DISPLAY 1

OUTPUT TO DISPLAY 2

OUTPUT TO DISPLAY 3

OUTPUT TO DISPLAY 4

Features

C100E-3

CODE

PKG

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