I am considering the Si545 in the CMOS configuration in a design I am working on. I am wondering about the impedance of the output when it is disabled. Does it go high impedance? Or just to a static state?
While I'm at it. What is the active output impedance?
Thanks in advance.
1) When disabled via OE deassertion, the output goes Hi-Z (high impedance).
2) The output impedance for LVCMOS output format is about 35 ohms. We recommend a 10 ohm series resistor to dampen the effects of signal reflections when using 50 ohm impedance rules for PCB layout of clock traces.