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PDF MAX3815 Data sheet ( Hoja de datos )
| Número de pieza | MAX3815 | |
| Descripción | TMDS Digital Video Equalizer | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3815 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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19-3466; Rev 2; 2/08
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
TMDS Digital Video Equalizer for DVI/HDMI
Cables
General Description
The MAX3815 cable equalizer automatically provides
compensation for DVI™, HDMI™, DFP, PanelLink®, and
ADC cables. It extends the usable cable distance up to
36 meters. The MAX3815 is designed to equalize sig-
nals encoded in the transition-minimized differential
signaling (TMDS®) format.
The MAX3815 features four CML-differential inputs and
outputs (three data and one clock). It provides a loss-
of-signal (LOS) output that indicates loss-of-clock sig-
nal. The outputs include a disable function or the
equalizer can be powered down to conserve power.
For direct chip-to-chip communication, the output dri-
vers can be switched to one-half the DVI output specifi-
cation to conserve power and reduce EMI. Equalization
can be automatic or set to manual control for specific
in-cable applications.
The MAX3815 is available in a 7mm x 7mm, 48-pin
TQFP-EP package and operates over a 0°C to +70°C
temperature range.
Applications
Front-Projector DVI/HDMI Inputs
High-Definition Televisions and Displays
DVI-D/HDMI Cable-Extender Modules and Active
Cable Assemblies
LCD Computer Monitors
Pin Configuration appears at end of data sheet.
Features
♦ Extends TMDS Cable Reach to Projectors or
Monitors Using DVI, DFP, PanelLink, ADC, or
HDMI Interfaces
♦ Extends TMDS Interface Length as Follows:
0 to 50 Meters Over DVI-Cable, 24 AWG STP
(Shielded-Twisted Pair)
0 to 36 Meters Over DVI-Cable, 28 AWG STP
0 to 30 Meters Over DVI-Cable, 30 AWG STP
♦ Compatible with DTV Resolutions 480i, 480p,
720p, 1080i, and 1080p
♦ Compatible with Computer Resolutions VGA,
SVGA, XGA, SXGA, UXGA
♦ Fully Automatic Equalization Up to 40dB at
825MHz (1.65Gbps), No System Control Required
♦ 3.3V Power Supply
♦ Power Dissipation of 0.6W (typ)
♦ 7mm x 7mm 48-Pin TQFP Lead-Free Package
Ordering Information
PART
TEMP
RANGE
MAX3815CCM 0°C to +70°C
MAX3815CCM+ 0°C to +70°C
+Denotes lead-free package.
*EP = Exposed pad.
PIN-
PACKAGE
48 TQFP-EP*
48 TQFP-EP*
PKG
CODE
C48E-8
C48E-8
Typical Application Circuits
VIDEO PROJECTOR
LAPTOP
VGA INPUT
DVI-D INPUT
MAX3815
EQUALIZER
DVI-D CABLE UP
TO 36m OR 120ft
(28AWG STP)
Typical Application Circuits continued at end of data sheet.
RGB/HV
ADC/SYNC
TMDS
DESERIALIZER
IMAGE
SCALER AND
PROCESSOR
PANEL
INTERFACE
TIMING AND
DRIVERS
LCD,
DLP,
OR
LCOS
DVI is a trademark of Digital Display Working Group.
HDMI is a trademark of HDMI Licensing, LLC.
PanelLink and TMDS are registered trademarks of Silicon Image, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
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TMDS Digital Video Equalizer for DVI/HDMI
Cables
Typical Operating Characteristics (continued)
(Typical values are at VCC = +3.3V, TA = +25°C, data pattern = 27 - 1 PRBS + 20 ones + 27 - 1 PRBS (inverted) + 20 zeros, unless
otherwise noted.)
EQCONTROL VOLTAGE (RELATIVE TO VCC)
vs. CABLE LENGTH (MANUAL EQ CONTROL)
0
CABLE IS TENSOLITE TWIN-AX
-0.1 28 AWG WITH APPROXIMATELY
200MAX3815 toc13
180
-0.2 0.34dB OF LOSS PER FOOT AT
825MHz
-0.3
160
140
-0.4 EQCONTROL VOLTAGE
-0.5
120
100
-0.6 80
-0.7 60
-0.8 RESIDUAL JITTER 40
AT 1.65Gbps
-0.9 20
-1.0
0
0
20 40 60 80 100 120
CABLE LENGTH (ft)
EQUALIZER OUTPUT EYE AFTER 120ft
OF CABLE (DATA RATE = 1.65Gbps)
MAX3815 toc14
CABLE IS TENSOLITE
TWIN-AX 28 AWG
200mV/div
100ps/div
LOSS-OF-CLOCK ASSERT THRESHOLD
vs. CABLE LENGTH
350
CABLE IS TENSOLITE TWIN-AX 28 AWG
300
250
200
165MHz CLOCK FREQUENCY
150
100
50
0
0
25MHz CLOCK FREQUENCY
20 40 60 80 100 120
CABLE LENGTH (ft)
Pin Description
PIN NAME
FUNCTION
1, 4, 5, 8, 9,
12, 13, 16,
38, 41, 43, 44
2
3
6
7
10
11
14
15
VCC
RX0_IN-
RX0_IN+
RX1_IN-
RX1_IN+
RX2_IN-
RX2_IN+
RXC_IN+
RXC_IN-
Supply Voltage. All pins must be connected to VCC.
Negative Data Input, CML
Positive Data Input, CML
Negative Data Input, CML
Positive Data Input, CML
Negative Data Input, CML
Positive Data Input, CML
Positive Clock Input, CML
Negative Clock Input, CML
Equalizer Control. This pin allows the user to control the equalization level of the MAX3815. Connect
17
EQCONTROL
the pin to GND for automatic operation. Set the voltage to VCC / 2 for minimum equalization, or set
the voltage between VCC - 1V to VCC for manual equalization. See the Typical Operating
Characteristics for more information.
18
CLKLOS
Loss-of-Clock Signal Output, LVTTL Open Collector. This pin asserts low upon loss of the input TMDS
clock from the cable.
19 PWRDWN Power-Down Input, LVTTL. This input allows the IC to be powered down to conserve power. Connect
high for normal operation. Pull low for power-down mode.
_______________________________________________________________________________________ 5
5 Page 
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TMDS Digital Video Equalizer for DVI/HDMI
Cables
Revision History
REVISION REVISION
NUMBER DATE
DESCRIPTION
0 10/04 Initial release.
1
8/05
Removed future status from the lead-free package in the Ordering Information
table.
2
2/08
Removed reference to the schematic and board layers in the Layout
Considerations section.
PAGES
CHANGED
—
1
9
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX3815.PDF ] | |
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