quick 4049 data *** question
- From: "tempus fugit" <toccata@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 26 Nov 2006 21:27:07 -0500
Hey all;
I'm driving a 2222 transistor with the 5v output high from a 4049 inverter.
I'm not sure which figure to refer to on the data *** regarding how much
current I can safely draw from it though. I was hoping to use a 1-3k
resistor on the base of the transistor (it's being used as a simple switch).
One of the figures says "Output Drive Current (for 5v supply) -1.6mA (typ.)
Another says: "Output Sink Current (for 5v) 6.4mA (typ.)
Which one do I use to decide on my base resistor? Here is a link to the
data***:
http://www.fairchildsemi.com/ds/CD/CD4049UBC.pdf
Thanks
.
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