HI Support
WE have used SN74LVC1G86 , Xor Gate . where two digital IO from micro-controller goes to this X-OR inputs. Both have 2.2K pull up resistor. we have one 0.1uf ceramic cap on Power supply line of this X-or IC.
so ideally when both the IO are same , Xor Output will be Low and when both IO are different then Xor Output will be high.
we have observe one unit which was kept at 50C ambient forma month , that byapss capacitor on IC pin have one end dry solder. (see below comment)
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We bring out the unit form test chamber. and observe
C34 , (0.1uf/50V) one end was dry , although have connectivity , but once try to touch solder at one end of capacitor it came out.
Section:- Relay X-OR IC Bypass capacitor.
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I want to know what can happen if bypass capacitor was got disconnect , what are the possibility. can x-or IC behave opposite (like X- Nor).