The M21350 and M21355 are quad serial digital video reclockers with integrated trace equalization, and automatic rate detect (ARD) circuitry. The M21350 has a 4:1 mux on the input of each reclocker channel whereas the M21355 has a common 16×4 crosspoint switch at the input to all four channels. It operates at SDI data rates ranging from 270 Mbps to 2970 Mbps and is compliant to SMPTE 424M, SMPTE292, and SMPTE 259M-C. At 270 Mbps, it also supports DVB-ASI. The M21350 and M21355 have an input jitter tolerance (IJT) of greater than 0.6 unit intervals (UI) and can provide retimed serial data outputs with very low alignment jitter. The quad reclockers require a single, external, 27 MHz crystal, which is used as the reference clock for all four channels. The devices also include per lane analog input equalization for up to 40″ of FR4 trace and two connectors in addition to output de-emphasis. These devices feature integrated supply regulators, allowing it to be powered from 1.2 V, 1.8 V, 2.5 V, or 3.3 V supply voltages. When operating at 1.2 V, it consumes only 135 mW per channel at 3G-SDI. Furthermore, the power rails for the core, input, and output circuitry are electrically independent and as such may be connected to different voltage rails on the board. This feature enables the M21350/M21355 to be DC coupled to any upstream or downstream device regardless of its input/output voltage level. Each of the M21350’s quad input MUXes allow any of the four inputs to be switched to the respective reclocker channel. The M21355’s 16×4 input crosspoint allows any of the 16 inputs to be routed to any of the four integrated reclockers. The devices can be configured by setting the internal registers though standard two-wire and four-wire interfaces. Limited configuration is also possible through hardware pin settings. The M21350 and M21355 are offered in a green and RoHS-compliant, 10 mm x 10 mm, 72-pin QFN packaging.