The ICS9173B provide the analog PLL circuit blocks to implement a frequency multiplier. Because the device is configured to use an external divider in the PLL clock feedback path, a large divider can be used to result in a large frequency multiplication ratio. This is useful when using a low frequency input clock to generate a high frequency output clock. The ICS9173B contains a phase detector, charge pump, loop filter, and voltage-controlled oscillator (VCO). The ICS674-01 can be used as the external feedback divider. A common application of the ICS9173B is the implementation of a video genlock circuit. Because of this, the ICS9173B inputs operate on the negative-going clock edge. The ICS9173B is pin and function compatible to the AV9173-01/15.
Phase-detector/VCO circuit block
Ideal for genlock system
Reference clock range 12 kHz to 1 MHz for full output clock range
Output clock range of 1.25 to 75 MHz (-01), and 0.625 to 37.5 MHz (-15). See "Allowable Input Frequency to Output Frequency" table for conditions