- #1
mishobg12
- 25
- 0
Hi,
will I damage the IC (it is 74LS07) if I select a pullup giving 20 mA of current trough the open collector (without any other load)?
I looked at the datasheet but I can't figure which parameter should I be looking at (because they give HIGH-level output current of 250 micro amps. What I "inject" trough the open collector is -20 mA as far as I understand it, so it kind of confuses me)
Here is what I want to do:
http://prikachi.com/files/1299347N.png
(Sorry for the poor drawing)
Not only do I use the transistors to use the bigger current, but I also use it as an invertor.
If I have a zero, the 20 mA go trought the respective LED. Otherwise, they go to GND trought the IC.
Will this work?
Thanks in advance :)
will I damage the IC (it is 74LS07) if I select a pullup giving 20 mA of current trough the open collector (without any other load)?
I looked at the datasheet but I can't figure which parameter should I be looking at (because they give HIGH-level output current of 250 micro amps. What I "inject" trough the open collector is -20 mA as far as I understand it, so it kind of confuses me)
Here is what I want to do:
http://prikachi.com/files/1299347N.png
(Sorry for the poor drawing)
Not only do I use the transistors to use the bigger current, but I also use it as an invertor.
If I have a zero, the 20 mA go trought the respective LED. Otherwise, they go to GND trought the IC.
Will this work?
Thanks in advance :)
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