Low-voltage differential signaling (LVDS) is generally the lowest power and lowest electromagnetic interference (EMI) noise solution because of its smaller signal swing. LVDS is capable of speeds as high as 3.125 Gbps and with pre-emphasis and equalization can achieve excellent cable and FR4 reach. A basic CML (current mode logic) switch only requires 2 transistors vs 4 for LVDS, so CML can achieve higher speeds (up to and beyond 10 Gbps) and typically the lowest jitter. CML has very fast edge rates with de-emphasis, equalization, and excellent cable and FR4 reach. In the range between 1 and 3.125 Gbps, either LVDS or CML might be appropriate – CML with the best jitter performance, LVDS requiring less power. With signal conditioning, both technologies can achieve a 15m cable reach. However, since LVDS pre-emphasis boosts signal strength while CML de-emphasis actually lowers signal amplitude, LVDS is likely to be a better solution for very long cables. Texas Instruments offers an excellent portfolio of both technologies.