214X4-DSH-001-D Datasheet, PDF (1/20 Pages) M/A-COM Technology Solutions, Inc. – SD, HD, and 3G Cable Equalizers

M21404/M21414/M21424 SD, HD, and 3G Cable Equalizers
The M21404/M21414/M21424 are high-speed, low-power, adaptive co-axial cable equalizers designed to increase
the maximum low-jitter transmission distance of serial digital interface (SDI) video signals and DVB-ASI across
commonly used bandwidth-limiting 75Ω 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 M21414 is
designed to support SD and HD data rates from 143 Mbps and 1485 Mbps. The M21404 is designed to support SD
data rates between 143 Mbps and 540 Mbps.
The low-noise, high-gain equalizer allows for low jitter 3G-SDI transmissions up to 100m (Belden 1694A) and HD
transmissions 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.
Applications
• SDI Routers
• SDI Switches
• SDI Distribution Amplifier
• SDI Camera
Standards Compliance
• SMPTE 259M, SMPTE 292, SMPTE 344M, SMPTE 424M
(at appropriate data rates)
• DVB-ASI (270 Mbps)
Features
• SMPTE/DVB-ASI compliant at SD, HD and 3G (M21424)
• SMPTE/DVB-ASI compliant at SD and HD (M21414)
• SMPTE/DVB-ASI compliant at SD (M21404)
• Dual CML outputs, with selectable high amplitude
• Enable for second CML output
• Interchangeable PCB footprint for all three devices
• 2.5V or 3.3V Supply
• Low Power (175 mW @ 2.5V, 230 mW @ 3.3V)
• Extended Temperature range: –10 to 85 °C
Functional Block Diagram
SD/ MUTE THRESH SWING_L/H
M21404 /M21414/M21424
Cable Equalizer
SDI
INPUT
BUFFER
SDI
EQUALIZER
CORE
CABLE
LENGTH
INDICATOR
CONTROL
LOGIC
1
DC
RESTORE
0
OUTPUT
BUFFER
OUTPUT
BUFFER
SDO1
SDO1
SDO2
SDO2
CLEN
EQ_ BYP
SDO2_EN
214x4-DSH-001-D
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
March 2010