MAX3815ACCM+T Maxim Integrated Products, MAX3815ACCM+T Datasheet - Page 10

• Manufacturer Part Number: MAX3815ACCM+T
• Description: IC DGTL VIDEO EQUALIZER 48TQFP
• Manufacturer: Maxim Integrated Products
• Type: Video Equalizerr

Specifications of MAX3815ACCM+T

• Applications: HDMI, DVI, Receivers
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TMDS Digital Video Equalizer for
HDMI/DVI Cables
Figure 7. Cable Reach
The OUTON pin is an LVTTL input. Force the pin low to
enable the outputs. Force the pin high to set a differen-
tial zero on the outputs, irrespective of the signal at the
inputs.
TMDS performance is heavily dependent on cable quality.
Deterministic jitter (DJ) can be caused by differential-to-
common-mode conversion (or vice versa) within a twisted
pair (STP or UTP), usually a result of cable twist or dielectric
imbalance. Refer to Application Note 3353: HFAN-04.5.4:
‘Jitter Happens’ when a Twisted Pair is Unbalanced and
Application Note 4218: Unbalanced Twisted Pairs Can
Give You the Jitters! for more information.
The data and clock inputs are the most critical paths for
the MAX3815A and great care should be taken to mini-
mize discontinuities on these transmission lines between
the connector and the IC. Here are some suggestions for
maximizing the performance of the MAX3815A:
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TYPICAL MAX3815A CABLE REACH
TYPICAL LIMIT OF CABLE
WITH EQ AT 2.25Gbps
(DATA RATE = 2.25Gbps)
WITHOUT EQ AT 2.25Gbps
TYPICAL LIMIT OF CABLE
Output On (OUTON) Input
WIRE GAUGE (AWG)
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Layout Considerations
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Cable Selection
22
• The data and clock inputs should be wired directly
• Place supply filter capacitors close to the MAX3815A
• Input and output data channel designations are only
• An uninterrupted ground plane should be positioned
• Ground-path vias should be placed close to the input/
• Maintain 100Ω differential transmission line impedance
• Use good high-frequency layout techniques and
The exposed pad on the 48-pin TQFP-EP provides a very
low thermal resistance path for heat removal from the
IC. The pad is also electrical ground on the MAX3815A
and must be soldered to the circuit board ground
for proper thermal and electrical performance. Refer
to Maxim Application Note 862: HFAN-08.1: Thermal
Considerations of QFN and Other Exposed-Paddle
Packages for additional information.
PROCESS: SiGe BiPOLAR
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE
between the cable connector and IC without stubs.
inputs to provide a low inductance path for supply
return currents.
a guide. Polarity assignments can be swapped and
channel paths can be interchanged.
beneath the high-speed I/Os.
output connectors to allow a low inductance return
current path.
into and out of the MAX3815A.
multilayer boards with an uninterrupted ground plane
to minimize EMI and crosstalk. Refer to Application
Note 3854: MAX3815: Interfacing to the MAX3815
DVI/HDMI Cable Equalizer and the EV kit data sheet,
MAX3815AEVKIT-HDMI.
48 TQFP-EP
PACKAGE CODE
Package Information
C48E+8
Exposed-Pad Package
Chip Information
DOCUMENT NO.
21-0065