155 Mbps full-duplex — what the data rate means for your link budget
At 155 Mbps the driver output swing and receiver threshold give about 30% eye-opening margin on a typical 1-meter cable with one connector pair, assuming controlled-impedance routing. That margin shrinks fast with stub length, unterminated drops, or a second connector — so keep the stub under 0.5 inches and terminate at the far end. The full-duplex architecture means you get simultaneous transmit and receive over two differential pairs, which saves a mux cycle on the FPGA or ASIC side compared to half-duplex parts that need direction control.
No last-time-buy window remains open through the franchised channel. The SN65LVDS179 is the industrial-temperature sibling in the same base family and shares the same pinout and electrical specification — it is the natural cross-check for a redesign or a bridge buy while you qualify a new source. If the board already runs the SN75 grade, verify that the SN65's wider temperature range does not introduce a thermal shutdown or threshold shift that changes system behavior.
Sourcing posture for the SN75LVDS179DRG4
Because this part is obsolete and no longer flows through TI's distribution pipeline, every reel we quote comes from our vetted independent inventory — traceable surplus, date codes verified, and tested for authenticity before shipment. If you are filling a last-time-buy gap or a repair depot order, send the quantity and target date code range and we will source against it.