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Product Overview
The M21424 is a high-speed, low-power, adaptive co-axial cable equalizer designed to increase the maximum low-jitter
transmission distance of serial digital interface (SDI) video signals and DVB-ASI across commonly used bandwidth
limiting 75
Ω
coaxial cable. These devices automatically optimize their transfer function based on the bit rate and
cable length to minimize the inter-symbol interference (ISI) jitter caused by the cable and to remove the DC offset
components introduced with the pathological test pattern and AC coupling in systems.
The M21424 is designed to support SD, HD, and 3G data rates from 143 Mbps to 2970 Mbps.
The low-noise, high-gain equalizer allows for low jitter 3G-SDI transmissions up to 100m (Belden 1694A) and HD trans-
missions up to a length of 200m (Belden 1694A) and 120m (Belden 8281). For SD data rates, cable lengths up to 400m
(Belden 1694A) and 300m (Belden 8281) are supported.
The M21424 is available in a green and RoHS compliant package.
Features
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SMPTE 424M, 292, 259M compliant, DVB-ASI (270 Mbps)
Adaptive cable equalization
Optimized data rates from 143 Mbps to 2.97 Gbps
Pair of CML outputs with selectable high amplitude
Mute and manual BYPASS mode
Typical equalized length of Belden 1694A cable: 100m at 2.97 Gbps
200m at 1.485 Gbps, and 400m at 270 Mbps
Low power dissipation (175 mW at 2.5V, and 230 mW at 3.3V)
2.5V or 3.3V power supply
Small form factor (5x5mm, 32-pin QFN package)
Extended operating temperature range: –10°C to +85 °C
Benefits
Robust standard compliant equalizers
Design flexibility and control
Range of solution for multiple data rates
High speed outputs with low cost integration
Supports non standard rates
Extend legacy cable length at higher speeds
Extend industry standard cable length
Low power and thermal management costs
Standard voltage supplies supported
Saves board area
Provides additional margin for most applications
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Product Brief
M21424
3G/HD/SD-SDI Dual-Output Cable Equalizer
M21424
Equalizer
Crosspoint
Cable Driver
Reclocker
Switch Card
Backplane
Fig. 1 - Routing Switcher Application Diagram
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Product Features
Applications
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•
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S D/ M UTE
Output Card
Input Card
THRE S H S W ING _ L/H
SDI Routers
SDI Switches
SDI Distribution Amplifier
SDI Camera
S DI
M 21424 Cable E qualizer
C ON TR OL
LOGIC
OUTPUT
BUFFER
S DO 1
S DO 1
Standards Compliance
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S DI
IN PU T
B U FFER
EQU A LIZER
C OR E
1
DC
RESTORE
SMPTE 259M, 292, 344M, 424M
Supports DVB-ASI (270 Mbps)
C A B LE
LEN GTH
IN D IC A TOR
0
OUTPUT
BUFFER
S DO 2
S DO 2
Package (RoHS Compliant)
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5x5 mm, 32-pin QFN
CLE N
E Q_ B Y P
S DO 2_E N
Fig. 2 - M21424 Block Diagram
For more product information, please visit
www.mindspeed.com
www.mindspeed.com/salesoffices
General Information: (949) 579-3000
Headquarters – Newport Beach
4000 MacArthur Blvd., East Tower
Newport Beach, CA 92660-3007
M21424-BRF-001-E.pdf
© 2010 Mindspeed Technologies, Inc. All rights reserved. Mindspeed and the Mindspeed logo are
trademarks of Mindspeed Technologies. All other trademarks are the property of their respec-
tive owners. Although Mindspeed Technologies 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 any express or implied warranties, including merchantability, fitness
for a particular purpose and non-infringement.
Mindspeed Technologies shall not be liable for
any special, indirect, incidental or consequential damages as a result of its use.
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