Configurable IO Chip Enables Bi-Directional Communication on Single BNC
Mon, 04/12/2010 - 10:55am
National Semiconductor announced a configurable I/O chip for serial digital interface (SDI) broadcast video equipment. This I/O chip allows manufacturers to program their BNC interface connectors as either inputs (equalizer) or outputs (cable driver). The PowerWise LMH0387 targets 3G/HD/SD video capture and editing cards that have a limited number of coax BNC connectors, as well as processing and distribution equipment that support a wide variety of I/O configurations. The universal BNC interface allows manufacturers to program their equipment I/O configurations post-delivery during studio installation. The chip also integrates the complex return loss network, to assure compliance to the Society of Motion Picture and Television Engineers (SMPTE) 424M return loss specification. The LMH0387 uses the same I/O pin for both input and output functions, and operates over a wide range of data rates from 125 Mbps to 2.97 Gbps, supporting SMPTE 424M, SMPTE 292M, SMPTE 344M and SMPTE 259M specifications.