Part Number: SN74AUC74
I'm using an SN74AUC74 and SN74AUC86 in combination for a phase detector (see below). The chip driving the SN74AUC74 has differential outputs swinging approximately 1.25V. I've used a biased balun to convert the differential output to single-ended input. However, the biasing appears to be causing a latch-up in the SN74AUC74 since the current draw from the device is >30mA. Presumably, I need to add a resistor or diode, or ensure the device starts up in preset/clear. What do you recommend?
