Hi!
I can't make CD74HC4053 working. In off state it shows 2-3uA leakage. What am I doing wrong?
. I'm attaching the schematic.
If I measure resistance in OFF state, my DMMs go nuts:
https://youtu.be/_osrkhBMWwA . I measured leakage, it shows 2-3uA. I tried to heat the IC with hotair, no change in leakage. In on-state, switches show 35 Ohms. All switches behave similarly. There is leakage between switches, which I find weird.
What I tried, none of it worked:
1. I changed the IC from TI (in DIP package) to and smd version from nexperia
2. Changed breadboard. Breadboard without IC shows no measureable leakage.
3. Added decoupling caps on supply rails
4. Checked voltage levels with DMM
5. Changed power supply to an old linear one (presumably low noise)
6. Replaced wires
7. Checked voltage rails
8. Replaced DMM leads
9. Cleaned flux as much as I could and dried the breakout board.
10. Tripple-checked everything, including IC orientation, can't find any issues.
Help