• HMC679 reset pin

    Creating a design with the HMC679 F/F and want to use the reset input to control ( inhibit / enable ) the toggling.

    This will be a DC control signal, but there is no info about required input signal levels / voltages / currents / recommended circuits…

  • HMC492 failures

    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…