I am wondering what component should I use to generate three clock outputs from an external crystal.
Your support is appreciated.
Do you need three different frequencies or three buffered copies of the crystal frequency?
I need three different frequencies, for example:
Xtal reference and 4MHz, 12MHz and 12 MHz.
If you're willing to use an XO instead of a crystal as an input, the AD9508 is a simple clock divider that can divide by anywhere from /1 to /1024.
Also, the AD9578 is another very good clock multiplier/synthesizer.
There are a few options to consider:
- The AD9577 is a fully configurable part which can use a XTAL reference and has four outputs, but the minimum output frequency is 11.2 MHz.
- The AD9553 is a fully configurable part which can use a XTAL reference and can synthesize frequencies down to 300 kHz, but it only has two outputs
- The AD9558 is a fully configurable part which can use a XTAL as a system clock input, can synthesize 4 different frequencies produce outputs down to ~300 kHz for 3 of the frequencies and down to 8 kHz for the 4th frequency, but it is probably overkill to accomplish what you are trying to accomplish.
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