Quad LVDS line driver for high-speed serial links
The SN65LVDS391PWR is a quad LVDS driver from Texas Instruments' 65LVDS series, delivering four independent driver channels in a single 16-TSSOP package. Rated for 630 Mbps per channel, it converts single-ended TTL/CMOS inputs into differential LVDS outputs for point-to-point or multidrop backplane links.
630 Mbps per channel — what the data rate means for your link budget
At 630 Mbps, the output transition time is fast enough that the PCB trace must be treated as a transmission line — the one-way propagation delay on a 10 cm FR4 trace is roughly 0.7 ns, so the driver's edge rate will see reflections unless the trace impedance is controlled to 100 Ω differential. The four drivers share a common supply and ground, so the per-channel power dissipation at 630 Mbps with a 100 Ω load is about 50 mW per driver (Vod ≈ 350 mV, Iod ≈ 3.5 mA). For a 4-lane link, the total supply current at full rate stays under the 3.6 V rail's capability — typical Icc is 25 mA per driver, so a 200 mA supply rail handles all four channels plus margin.
Active production, ROHS3, and sourcing posture
The part is ROHS3 compliant, and the 16-TSSOP package is a standard TI footprint with wide second-source availability.