IC pins? Does it matter? [LM3914N]

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Uner
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IC pins? Does it matter? [LM3914N]

Post by Uner »

Hey guys.

Just a really quick question...
I have been messing around with circuits, but I have never used a IC before. So, I got a scheme with a IC, and the pins are numbered from 1 to 18. On the IC itself tho, pins aren't indicated. I guess that means that the way I put the IC on my PCB is irrelevant, right?

Thanks,
Uner

EDIT:
I guess the answer was hard to find because the question was just too retarded. For those who are wondering...
IC pins are numbered anti-clockwise around the IC starting near the notch or dot.
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floodhound2
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Post by floodhound2 »

No most all ICs have a pin 1 and all other pins are counted off that one in a counterclockwise fashion.

Pin 1 on this TO220 package is far left 2 middle and 3 far right.

Image

Image

This is similar to your device and Pin1 is the one next to the dot. Page 22 of the data sheet shows where pin1 is located take a look

http://www.national.com/ds/LM/LM3914.pdf

Hope this helps :wink:

Code: Select all

EDITED sorry I got to this late looks like you got it. Look at the data sheet anyways if you need more information.
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