MaxLinear has introduced a new chip with dual tuners and dual QAM demodulators. Cable set-top makers can now halve the number of chips required to support multi-channel DOCSIS and cable video gateways.
It is common for gateways to support four dedicated video channels, but some support six, the company noted.
The MxL251 is a single-die digital front-end chip with two narrow-band RF tuners (6 MHz or 8MHz), two QAM demodulators and an integrated splitter to support dual- or triple tuner designs.
The device supports all global cable standards including ITU-T J.83 Annex A/B/C. The tuner can receive one RF coaxial cable input and deliver two MPEG transport stream outputs or two channels on an intermediate frequency (IF) output.
The new part replaces the company's MxL241SF, a single-die, integrated tuner and QAM demodulator. In comparison, the new chip reduces power consumption and board space requirements, and therefore costs to both manufacture and operate.