DOCSIS® 3.0 Upstream Amplifier


The MxL231 is a low-power, upstream PGA IC that is designed for DOCSIS 3.0 applications with extended power capability. The MxL231 targets DOCSIS and EuroDOCSIS cable gateway designs.

The amplifier covers a frequency range of 5MHz to 85MHz, and can transmit eight simultaneous 64-QAM signals, each at 56dBmV at the balun output. The MxL231 is designed to be used in conjunction with all MaxLinear DOCSIS 3.0 Full-Spectrum Capture™ (FSC™) tuners, such as the MxL265D, MxL267D, and MxL268.

The MxL231 is configurable through an SPI bus and operates using a single 3.3V supply. The MxL231 is offered in a small 4mm x 4mm footprint, 24-pin QFN package.


  • Very low-power consumption of 950mW typical in an eight-channel QAM mode
  • Low standby power <27mW
  • Small 4mm x 4mm QFN package
  • Single 3.3V supply
  • 65 gain steps in 1dB increments
  • 65dBmV combined Tx power for eight QAM channels at the balun output
  • Configurable through an SPI
  • Ideal upstream amplifier for MxL265D, MxL267D, and MxL268 designs
  • Supported Standards:
    • DOCSIS 3.0 and 2.0
    • EuroDOCSIS 3.0 and 2.0


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  • EMTAs
  • DOCSIS 3.0 cable modems
  • DOCSIS 3.0 cable gateways
  • VoIP modems
  • Set-top boxes (STBs)

Design Tools


Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
MxL231-AG-R 0 70 Active
MxL231-AG-T 0 70 Active
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Quality & Environmental Data

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

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