TQ1089

T R I Q U I N T S E M I C O N D U C T O R, I N C . Figure 1. Block Diagram FBIN GND REFCLK GND GND GND 11 10 9 8 7 6 TQ1089 GND 5 4 VDD 3 TEST 12 VDD 13 Phase Detector VCO Q10 Q9 11-Output Configurable Clock Buffer Features Wide frequency range: 65 MHz to 90 MHz and 130 MHz to 180 MHz Output configurations: eight outputs at fREF two outputs at 2x fREF or nine outputs at 1/2 x fREF one output at fREF Low output-to-output skew: 150 ps (max) within a group SYSTEM TIMING PRODUCTS Q0 14 2 GND 15 Q1 Q2 16 17 MUX Divide Logic ÷2 Output Buffers Group B Group A 1 GND 28 27 Q8 Q7 VDD 18 26 VDD 19 20 21 22 23 24 25 GND Q3 Q4 VDD Q5 Q6 GND 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 are available at either 1x and 2x or at 1x and 1/2 x the reference clock frequency, fREF . When one of the Group A outputs (Q0–Q8) is used as feedback to the PLL, all Group A outputs will be at fREF , and all Group B outputs (Q9, Q10) will be at 2x fREF . 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 fREF . A very stable internal Phase-Locked Loop (PLL) provides low-jitter operation. This completely self-contained PLL requires no external capacitors or resistors. The PLL’s Voltage-Controlled Oscillator (VCO) has a frequency range from 2...