Maybe someone has some info on this. I just built the ARP 2500 filter model 4075. Anyone have any information on the IC lm3900? I cant find a datasheet anywhere. I'm curious about the IC. I've included an attachment of the board layout.

 

The LM3900 is a standard (somewhat dated) National Semi part. Quad op-amp (related parts LM2900 and LM3301). There should be no problem finding it on the net! E

 

Maybe someone has some info on this. I just built the ARP 2500 filter model 4075. Anyone have any information on the IC lm3900? I cant find a datasheet anywhere. I'm curious about the IC. I've included an attachment of the board layout.

Google the part number and the word DATASHEET.

http://www.ti.com/lit/ds/symlink/lm3900.pdf

TI bought National Semiconductor a few years ago.

Also, your title refers to the LM13900 with 16 pins but your board layout shows the 14-pin LM3900.

 

Google the part number and the word DATASHEET.

http://www.ti.com/lit/ds/symlink/lm3900.pdf

TI bought National Semiconductor a few years ago.

Also, your title refers to the LM13900 with 16 pins but your board layout shows the 14-pin LM3900.

ah. thanks for the info.

 

ah. thanks for the info.

i confused the part number.