question about timer ICs

Ranthalion

Hello

This may be a dumb question, but I haven't been able to find out if there is a difference between these 2 chips. I was trying to put together a circuit that called for a LM555 timer chip.· I'm trying to use a NE555 timer chip, and the circuit isn't working.· It is supposed to flash an·LED, but the LED just stays on the whole time, so I was wondering if there is a difference between the LM555 and NE555 timers.· I also thought that maybe the problem is that the LED is flashing too fast for me to tell...·

Thanks
-Ranthalion

knightofoldcode

I am fairly certain the chips are the exact same and are completly interchangable.

Speculation made me think they are the same, then after finding the following datasheet, I'm almost positive,
www.fairchildsemi.com/ds/SA%2FSA555.pdf

Knight.

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kjennejohn

Can you supply a schematic of the circuit you are building?

Happy holidays!
kenjj

ChrisP

the LM555 and NE555 are interchangeable. However there are a couple of different flavors of each as far as current rating. Typicaly 100-200ma.