LMH1297RTVT

LMH1297 Bidirectional I/O

Texas Instruments LMH1297 Bidirectional I/O is a 12G UHD-SDI 75Ω bidirectional I/O with integrated reclocker. This device can be configured either in input mode as an adaptive cable equalizer or in output mode as a dual cable driver. This feature allows system designers the flexibility to use a single BNC either as an input or output port, simplifying UHD video hardware designs. The integrated reclocker locks to all supported SMPTE data rates up to 11.88Gbps in both modes. The bidirectional I/O has an on-chip 75Ω termination and return loss compensation network that meets the stringent SMPTE return loss requirements. An additional 75Ω driver output allows the LMH1297 to support a variety of system functions. In EQ (Equalizer) Mode, this second 75Ω driver can be used as a loop-through output. In CD (Cable Driver) Mode, this 75Ω driver can be used as a second fan-out cable driver. The host-side 100Ω driver can also be used as a loopback output in CD Mode for monitoring purposes.