74LS241 DATASHEET PDF

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Marisar Therefore any results you get using a power supply of 3. So your first tests were done without any power connected to the Vcc pin! I would have guessed the current gain was more than 0. Note that you 74ld not enable both G inputs e. It is likely that the output remained in a high-impedance state, so the LED did not light.

SE topics where powering devices via other pins, instead of the power pins, caused unexpected behaviour: Please show the schematic diagram. This is clearly what I am expecting. I dataeheet put a led on the 3 output pin, in order to test the output. JvO 2 And when I connect the Vcc pin, without 19 and 17, my led is on, where I expected this to be off. Email Required, but never shown. Do you understand WHY we have tri-state outputs?

Unless you know exactly what you are doing and its consequences, do not apply datasheeg to the other pins of an IC, without the correct power supply voltage s also being supplied to its specified power pins i. Note the invertor symbol tiny o ring at the control gate connected to pin 1; you must pull pin 19 high to datashewt, and pin 1 low to activate.

Mr Bonjour 1 2 Sign up using Email and Password. Sign up or log in Sign up using Google. Sign up using Facebook. Unfortunately your test is invalid because according to your recent schematic your Vcc supply to the 74LS is only 3. It is not guaranteed to operate at 3. If you pull pin 19 down, the output will float and both LEDs will glow dimly because current is passing through both of them.

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