News: Microelectronics
23 June 2021
pSemi launches high-linearity SPDT switch for DOCSIS 3.1 and beyond
Murata company pSemi Corp of San Diego, CA, USA – a fabless provider of radio-frequency integrated circuits (RFICs) based on silicon-on-insulator (SOI) – has introduced a DOCSIS 3.1-compliant switch that meets increased demands for faster download speeds, higher bandwidth and data throughput required for home internet connections.
Designed for use in cable broadband applications including DOCSIS 3.1 cable modems, set-top boxes and residential gateways, the UltraCMOS PE42726 is a single-pole, double-throw (SPDT) radio-frequency switch that delivers high linearity, what is claimed to be excellent low-frequency harmonics performance, and high surge immunity in the 5–1794MHz band.
“As remote work has become mainstream, global cable operators are deploying higher data rates to meet increased usage and bandwidth demands over existing cable connections,” says Vikas Choudhary, VP of sales & marketing. “pSemi offers a family of RF solutions for cable broadband, including patented linearity technology enhancements to maximize data rates,” he adds. “PE42726 is the industry’s highest-linearity, lowest-spurious-noise RF switch delivering best-in-class harmonics for industry-standard DOCSIS 3.1 and beyond,” Choudhary claims.
The PE42726 delivers what is reckoned to be best-in-class linearity across 5–1794MHz with exceptional second- and third-harmonic performance of -121dBc and -150dBc, respectively, at the fundamental frequency of 17MHz. These levels ensure that the upstream transmit (Tx) signal keeps the downstream receive (Rx) frequency range free of any unwanted self-interference across the shared coax cable. The switch features low insertion loss of 0.3dB at 1218MHz and high isolation performance of 39dB at 204MHz to keep Tx signal loss very low and to help with overall isolation of two independent diplexer filter paths.
Manufactured on pSemi’s patented UltraCMOS process and offered in a 12-lead, 3mm x 3mm QFN package, the PE42726 can also support the performance requirements of DOCSIS 4.0.
