TQ1089

TriQuint's TQ1089 is a configurable clock buffer which generates 11 outputs, operating over a wide range of frequencies from 65 MHz to 90 MHz and from 130 MHz to 180 MHz. The outputs of TQ1089 are available at either 1x and 2x or at 1x and ¹/₂ x the reference clock frequency, f_REF . When one of the Group A outputs (Q0 Q8) is used as feedback to the PLL, all Group A outputs will be at f_REF , and all Group B outputs (Q9, Q10) will be at 2x f_REF . When one of the Group B outputs is used as feedback to the PLL, all Group A outputs will be at ¹/₂ x fREF and all Group B outputs will be at f_REF.

A very stable internal Phase-Locked Loop (PLL) of TQ1089 provides low-jitter operation. This completely self-contained PLL requires no external capacitors or resistors. The PLL's Voltage-Controlled Oscillator (VCO) has frequency range from 260 MHz to 360 MHz. By feeding back one of the output clocks to FBIN, the PLL continuously maintains frequency and phase synchronization between the reference clock (REFCLK) and each of the outputs.

TriQuint's patented output buffer design of TQ1089 delivers a very low output-tooutput skew of 150 ps (max). The TQ1089's symmetrical TTL outputs are capable of sourcing and sinking 30 mA.