Convergence Video
Video Encoders/Decoders
Single-Chip, High-Performance
(DVI) Digital Video Transmitter
CX25894/5/6
DVI Compliancy and Dual Channel Support
Numerous Applications
Conexant’s broadband communications portfolio includes a
comprehensive suite of semiconductor solutions that enable the
digital home and information network. Compliant with the Digital
Visual Interface (DVI) industry specification, the CX25894/5/6 family
of high performance, single-chip transmitters offers single or dual link
output. Supporting up to two independent concurrent channels and
two serial interfaces, this device is well suited for desktop PCs
or any application that drives digital or flat panel displays.
High-bandwidth Digital-Content Protection (HDCP) was developed to
protect digital entertainment content flowing over the DVI interface.
HDCP encrypts the transmission of digital content between the video
source or transmitter – such as a computer, DVD player or set-top box –
and the digital display, or receiver – such as a monitor, television or
projector. Once authentication is established, the transmitter encrypts
the data and sends it to the receiver for decryption.
Three versions of this DVI-Compliant transmitter are available. The
CX25895/6 accepts and sends out different resolutions and independent
content simultaneously.
CX25894
offers a single channel, single link DVI, supporting resolutions up
to 1600 x 1200, 60 Hz vertical refresh (maximum).
CX25895
adds another independent channel and supports up to two
single link 1600 x 1200 DVI outputs or a dual link output with a resolution
to 2048 x 1536. Using the CX25895, you have the flexibility to enable two
low-resolution DVI outputs or one high resolution flat panel monitor or DTV.
CX25896
builds upon the CX25895 but adds the industry standard
high definition copy protection (HDCP 1.0).
The CX25894/5/6 is packaged in an 84-pin QFN (body: 12.0 mm x 12.0
mm, pin pitch 0.40 mm). All are pin compatible.
Feature Overview
TV out
Encoder
HDTV Dual
Link
DVI
Links
HDCP
Concurrent
Channels
Different
Resolutions
on each channel
Distinguishing Features
• Two independent channels (CX25895/6),
providing simultaneous operation at
different resolutions
• Low, mid and high-end solutions for
varied customer applications
• Lowest cost solution and component
count requiring smaller layout space
• HDCP 1.0 copy protection to secure
digital entertainment content over DVI
• Compatible with industry standard
DVI receivers, DVI 1.0 compliant
• Programmable impedance
matching to work with marginal
or non-compliant receivers
• Pin compatibility among all
series members
CX25894
CX25895
CX25896
No
No
No
No
Yes
Yes
1
2
2
No
No
Yes
N/A
Yes
Yes
N/A
Yes
Yes
Part Number
CX25894/5/6
Description
DVI Transmitter
Convergence Video
Video Encoders/Decoders
CX25894/5/6 Features
CX25894
• Single-Link DVI 1.0 Transmitter
• Programmable impedance matching
• Scalable low voltage graphics controller interface
from 3.3v down to 0.8v
• DVI data rate from 25 MHz to 165 MHz
• DVI resolutions from 640 x 350 to 1600 x 1200
(60 Hz refresh)
•
Single-ended or differential clocking
•
Multiple industry-standard digital input
formats:
- 15/16-bit RGB multiplexed
- 24-bit RGB multiplexed (standard and alternate)
• Serial data in transmission minimized differential
signaling (TMDS) output
• Programmable and pin-based power down modes
• Generates half clock pattern and pseudo-random
sequence pattern internally
• Hot-plug detection of flat-panel (FD) monitor
• 2-wire serial programming interface
CX25895
Same features as the CX25894 plus:
• Dual-link DVI supports DVI resolutions from
1600 x 1200 to 2048 x 1536 (maximum)
• Two simultaneous concurrent DVI links
(same content) up to 1600 x 1200
• Two concurrent DVI links (different content)
up to 1600 x 1200
• High-Resolution DVI 1.0 Support
• 1080i, 720p, 480p ATSC resolutions
CX25896
Same features as the CX25895 plus:
•
High-bandwidth Digital Content Protection
(HDCP) support
CX25894/5/6 Applications
•
Notebook PC
•
Graphics card
•
Set-top Box
•
Game console
•
DVD player
© 2003, Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant
logo are registered trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
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CX25894 Block Diagram
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CX25895 Block Diagram
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CX25896 Block Diagram
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters – Newport Beach
4000 MacArthur Blvd, P Box C
.O.
Newport Beach, CA 92660-3095
Order# 102227A
Conexant shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
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