![]() ![]() This is likely to make the IC behave erratically and it will significantly increase the supply current. Inputs can easily pick up electrical noise and rapidly change between high and low states in an unpredictable way. They will not affect the part of the circuit where they are connected. Inputs have very high impedance (resistance), this is good because it means.74HCT Supply: 5V ☐.5V, a regulated supply is best. ![]() 74HC Supply: 2 to 6V, small fluctuations are tolerated.ICs should be left in their protective packaging until you are ready to use them. In fact most ICs in regular use are quite tolerantĪnd earthing your hands by touching a metal water pipe or window frame before handling them will be adequate. (from your clothes for example) may damage the IC. Touching a pin while charged with static electricity ![]() The CMOS circuitry used in the 74HC and 74HCT series ICs means that they are ![]()
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