M21644 Datasheet, PDF (1/31 Pages) M/A-COM Technology Solutions, Inc. – 3G/HD/SD-SDI Long Reach Adaptive Cable Equalizer

M21644, M21654, M21664
3G/HD/SD-SDI Long Reach Adaptive Cable Equalizer
The M21644/54/64 are multi-rate, highly integrated, adaptive cable equalizers for SDI and DVB-ASI video as well as digital
audio applications. It provides adaptive, low noise, high gain equalization for 75  coaxial cable at SDI data rates from
125 Mbps to 2.97 Gbps. The device is capable of compensating for losses accumulated across cable length up to 200 m when
operating at 2.97 Gbps.
The M21644/54 feature dual differential outputs, eliminating the need for additional circuitry and simplifying system design. Both
outputs feature programmable swing as well as de-emphasis for enabling the signal to be transmitted across 40" of FR4 trace.
The second, optional output may be disabled for additional power savings. The M21664 offers a single output solution with a
smaller footprint and maximum power savings.
The device operates using a single 2.5 V supply voltage and has extremely low power consumption dissipating only 105 mW
when one output driver is enabled. It may be used in either hardware mode, or controlled through a standard four-wire serial
digital interface. Furthermore, it features advanced diagnostic capabilities such as cable length indication, loss of signal
detection, and offers power management functions such as power down upon loss of signal.
The M21644/54/64 are offered in a green and RoHS compliant small footprint QFN package.
Features
• SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE 259M, and
DVB-ASI compliant
• Robust adaptive cable equalization for up to 200 meters of Belden
1694A at 2.97 Gbps, up to 200 meters of Belden 1694A at
1.485 Gbps, and up to 400 meters of Belden 1694A at 270 Mbps
• Individually controllable dual differential output drivers with
programmable 8 dB of de-emphasis
• Optional 6 dB flatband gain at input
• Cable length indication
• SD, HD and 3G Data Rate Detection
• Optional four-wire serial digital interface
• Very low power consumption: 105 mW (single output), 120 mW
(dual output)
• Power down and mute features
• Extended operating temperature range: -40 °C to +85 °C
Applications
• Broadcast video routing and production switchers
• Broadcast video distribution amplifiers
• Broadcast video cameras and monitors
Functional Block Diagram
LOS
Mute
Digital Interface
Prog.
SDI
6 dB
Gain
Adaptive
EQ
MUX
DE
& Prog.
Swing
Ctrl
DE
& Prog.
Swing
Ctrl
SDO0
SDO1
21644-DSH-001-B
Mindspeed Technologies^®
Mindspeed Proprietary and Confidential
July 2013