# Difference between NE555 and NE555xx

I'm going to order the NE555 chip from Texas Instruments (Link) to build a circuit, but they only have NE555P, NE555DR etc. Can I use the NE555xx instead of NE555? What is the difference between them?

As you can see, in NE555xx, the xx represent a different package type. There is more information about these xx on pages 20-22 inside the datasheet. The letters NE/SA/NA/SE before the 555 represent slightly different manufacturing processes & part QA, corresponding mostly to safe operating temperature ranges (commercial, industrial, automotive, military) & voltages. You need to read the datasheet and select the chip which is appropriate for you.
• en.wikipedia.org/wiki/555_timer_IC#Derivatives - as you can easily see, 555 timers variations naming ain't limited to this single datasheet; only NE/SA/NA/SE prefixes are related to temperatures (com,ind,auto&mil) - of the most common ones, LMC is the CMOS version, TLC is the LinCMOS one, there's also TS/CSS (low power versions), a very common LM (different manufacturing process & internals AFAIR) & some other versions I can't recall of the top of my head. – vaxquis Feb 15 '15 at 12:23