Need help for NJM4558S pinout

wui223 · November 17, 2006, 06:59:01 AM

I have a NJM4558S in box, but i couldn't find a single datasheet for it. It has 9 pins. Is there any way to know the pinout of this IC w/o datasheet? Help is very much appreciated.

Sir H C · November 17, 2006, 07:35:17 AM

http://pdf1.alldatasheet.com/datasheet-pdf/view/7446/NJRC/NJM4558.html

Shows the 8 pin in-line. Are you sure there are 9 pins?

wui223 · November 17, 2006, 09:08:29 AM

Yes,i swear it

. I know its kinda weird, but it IS a 9 pins buddy. Anyone?

Sir H C · November 17, 2006, 05:31:56 PM

I would look at the 8 pin one and get a feel for what the pins should be on the 9 pin version. From the PCB you should be able to figure it out.

wui223 · November 17, 2006, 07:12:12 PM

Unfortunately, it is a brand new chip i bought from shop.

Dai H. · November 18, 2006, 07:42:47 AM

pin 1 should be +V, 2 to 9 should be the same as the 4558L

wui223 · November 18, 2006, 10:01:19 PM

From the datasheet of NJM4558L, pin 8 is V+. If pin 1 of 4558S is V+, how about pin 9 of 4558S ?

mdh · November 18, 2006, 10:28:35 PM

Take a look at this Fairchild data sheet: http://www.fairchildsemi.com/ds/KA/KA4558.pdf. I'll bet your pinout will be the same as the 9-SIP package from Fairchild.

wui223 · November 18, 2006, 11:30:55 PM

Thanks alot to everyone. This mystery finally solved after 1 year. Now is time to make something out of it. Any suggestion? Tubescreamer?

News:

Need help for NJM4558S pinout