For my first project, I'm trying to make an LED light up when the voltage from a variable source reaches a certain point (13V in my exiting circuit).

To do this, I'm going to take the output from a 5V voltage regulator (L7805) and and run it to an LM360N comparitor, and then compare that voltage with the output of a voltage divider from my source voltage.

The problem I'm currently having is that I can't seem to figure out the pinout for my LM360N. It's a 14 pin DIP format and all the examples I see online are 8 pin SOIC. Can anyone offer some insight?

  • \$\begingroup\$ Are you certain that you have an LM360N? Both National and TI show the LM360 as only available in 8 pin packages. \$\endgroup\$ – Peter Bennett Sep 27 '15 at 20:01
  • \$\begingroup\$ I only found a single image of a LM360N-14 via Google, and it was an obvious counterfeit chip. I think you have a fake. \$\endgroup\$ – Ignacio Vazquez-Abrams Sep 27 '15 at 20:02
  • \$\begingroup\$ Is there a subtle glue line? \$\endgroup\$ – Andy aka Sep 27 '15 at 20:10
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    \$\begingroup\$ Writing on the top of the chip says, "/822 LM360M" \$\endgroup\$ – Sonny Boy Sep 28 '15 at 0:13
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    \$\begingroup\$ @SonnyBoy: Out of curiosity, did you buy this recently or is it a pull/recycled part you fond in some device? There hasn't been a chip with that marking on the market for at least 20 years... \$\endgroup\$ – Fizz Sep 28 '15 at 9:49

This 1994 datasheet shows the National Semi LM360 in 14 pin Ceramic Dip (Package J, not M). The pin out shows Pins 1, 2, 7, 8, 13, 14 are NC (Non-Connects). The rest match the 8 pin Dip and soic pinouts, with pin 3 matching pin 1 of the smaller packages, in physical location.

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    \$\begingroup\$ Still... I'm guessing the one the OP has is even older than that datasheet, because there's no DIP14 for LM360M in it... but only for LM160J-14/883 (ceramic). \$\endgroup\$ – Fizz Sep 28 '15 at 9:45
  • \$\begingroup\$ Good catch @RespawnedFluff. I'm hoping that the pinout matches for Op's use at least. \$\endgroup\$ – Passerby Sep 28 '15 at 9:57
  • \$\begingroup\$ @Ignacio Vazquez-Abrams: LM360N-14 definitely existed as did LM360J-14... around 1973: datasheetarchive.com/dl/Scans-062/DSA2IH00119655.pdf (as did LM260 of which you can't find any images in google either) Oddly enough LM360M-14 is not mentioned there... but it's almost surely the same. \$\endgroup\$ – Fizz Sep 28 '15 at 12:59

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