I build a circuit wit a drive buffer. When i make use of the logictoggle input from proteus the buffer(74HC365) is working correctly and when i replace them by just voltage sources and toggle the voltage source high low, it is not working anymore?
I have an output of 3.3V/0.0V from a comperator circuit and i want to use that as input to the OE. on the inputs at A1 there is also a 3.3V input.
Is this not working in proteus or what am i doing wrong?
I don't understand your textual explanation, nor do I understand what function you expect...
But as soon as /OE are high then the output is disabled.
Both /OE need to be LOW.
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For a real circuit:
* you need a power supply. And the HIGH input level depends on the power supply voltage.
* no input should be left floating
i mean that if i simulate my circuit with logic gates on the inputs than the buffer works normal. So low, output at Y1 is high. and high output at Y1 is low.
If i do this the same with voltage sources on the inputs the component gives alaways a low output at Y1.
I'm missing the supply pins. How should your logic gate interprete a HIGH or LOW voltage-level without a propper supply. The HIGH and LOW level depends on the supply voltage, have a look in the 74HC365 datasheet. Have a look at [1], you should make the hidden supply pins visible.
the supply pins are correct, so this is not a problem. These are hidden but VCC is set to 5V. The component is working with the logic inputs from proteus and gives a 5V output at Y1.
See pictures below. The output with the supply voltages should also be 5V but it is 0V.
have you tried to set your supply voltage to 3.3 V? According to the TI datasheet [1], the minimum HIGH voltage level is 3.15 V @ 25 °C and V_cc = 4.5V. By having a look at the V_cc = 6 V entry, a higher HIGH level input voltage can be seen. Thus, you may expect a HIGH voltage input level larger than 3.3 V @ V_cc = 5 V.