M21324 Datasheet, PDF (1/20 Pages) M/A-COM Technology Solutions, Inc. – SD, HD, 3G Cable Equalizer

M21324 SD, HD, 3G Cable Equalizer
The M21324 is a 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. This device automatically optimizes the 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 M21324 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 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.
The M21324 shares the same footprint as the GS2974A, GS1574/GS1574A or GS9074A, except that the M21324
has a shared Signal Detect/Mute function pin, while the GS2974A, GS1574/1574A and GS9074A have separate
CD and mute pins.
Applications
• SDI Routers
• SDI Switches
• SDI Distribution Amplifiers
• SDI Camera
Standards Compliance
• SMPTE 259, SMPTE 292M, SMPTE 344M,
SMPTE 424M complaint
• Supports DVB-ASI (270 Mbps)
Features
• Adaptive cable equalization
• Optimized data rate from 143 Mbps to 2.97 Gbps
• Typical equalized length of Belden 1694A cable: 100m at 2.97 Gbps,
200m at 1.485 Gbps, and 400m at 270 Mbps
• Programmable mute level
• Manual bypass mode
• Differential CML outputs (50 Ω on-chip terminations)
• Single 3.3V power supply
• Small form factor (4x4mm, 16-pin QFN package)
• Pb-free and RoHS compliant
• Extended operating temperature range: –10 to +85 °C
Functional Block Diagram
M21324
Cable Equalizer
SD/ MUTE THRESH
CONTROL
LOGIC
SDI
INPUT
BUFFER
SDI
EQUALIZER
CORE
1
DC
RESTORE
0
OUTPUT
BUFFER
SDO
SDO
21324-DSH-001-D
EQ_ BYP
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
March 2010