I've created a microwave counter using an HMC679 chip followed by 4 HMC492 chips, driving more ( common ) ECL chips.
Initial tests showed all the HMC492 chips were failed and had to be replaced. I attributed this to the soldering process ( oven reflow…
It sounds like the divider is self oscillating when the input is removed. There is an app note on this phenomenon at the link below. The appropriate value to prevent self oscillation without RF input is 8.25k for the HMC492, HMC493, and HMC494.
In the past we have found that 8.25k was the appropriate value to prevent self oscillation without RF input for the HMC492, HMC493, and HMC494.
The HMC492 frequency divider output will be a square wave with strong odd harmonics. If you wish, you can low pass or band pass filter the output to achieve a sine wave.
Generally speaking, most frequency dividers/counters are edge triggered logic…
Some dividers will self-oscillate in the absence of an RF input signal. For the HMC492, 493 and 494 dividers a shunt 8.25k ohm resistor placed on one of the differential inputs was the appropriate value to prevent self oscillation.
I would like to know the equivalent hours of HMC764LP6CE & HMC783LP6CE. I cnn't find the information in the attached Reliability Report. How can I calculate that value?
Some of the other HMC dividers have an input network similar to what you described (as an example HMC705 or HMC492), but this part went a different route for some reason. I also would tend to agree with you the /IN naming convention.
In regards to the diagram…