LMK1D2106RHAR

LMK1D2106RHAR is a Texas Instruments dual 1:6 LVDS clock fanout buffer in VQFN-40, distributing two input clocks to twelve differential output pairs at frequencies up to 2 GHz, for clock trees in communications, test and data-acquisition equipment. Its additive jitter is below 60 fs RMS maximum (12 kHz to 20 MHz at 156.25 MHz) with a typical phase-noise floor of -164 dBc/Hz, so the buffer adds negligible noise to an already clean reference — the practical benefit is that fanout no longer consumes the jitter budget reserved for the SerDes or converter at the end of the tree. Maximum propagation delay is under 575 ps with output skew held to 20 ps maximum, keeping multi-device sampling aligned; a high-swing mode sets a typical 500 mV output amplitude where longer traces need the extra margin. The supply spans 1.71 V to 3.465 V and the range is -40 to +105 degrees C. Selection advice: the RHAR code is the 2,500-piece large-reel option — RHAT is the same device in a 250-piece small reel, so choose by production volume. For fewer outputs, the smaller LMK1D family members cut package size and cost. Parameters verified against TI documentation for the LMK1D2106.