VT98521 - Vaishali Semiconductor

VT98521 3.3V Clock Multiplier

The VT98521 is a 3.3V CMOS, clock multiplier integrated circuit. The device provides an excellent quality high frequency output clock from a lower frequency crystal or clock input. Tri-level selection inputs S0 and S1 are used to select any one of eight multipliers, stored in the on-board ROM, and apply it to the input to produce the desired output, up to 22.

Features

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•= Low phase noise Zero ppm multiplication error Input clock frequency 5 - 50 MHz. Input crystal frequency 5
  – 27 MHz Output clock frequencies up to 220 MHz. 5V-tolerant inputs and output
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•= Fully Compatible with all popular CPUs Duty Cycle - 45/55 up to 160 MHz. - 40/60 160 MHz to 220 MHz 25mA drive capability at TTL levels High-Z output for board level testing Figure 1. Functional Block Diagram Figure 2. Pin Assignment VDD GND 8-pin SOIC/MSOP S0 S1 Clock or Xtal X1/ICLK input PLL Clock Multiplier & ROM Xtal. Osc. Output Buffer CLK X1/ICLK VDD GND S1 1 2 3 4 .