The A suffix is spec'd for a lower input offset voltage iirc. Look at both spec sheets to be sure. After all... I called the 556 a "dual timer" and got gently paddled... (well it IS a dual timer :^) H^) harry Cole Groff wrote: > Hey guys, > > What's the difference between a TL072ACP op amp and a TL072CP op amp? > > Thanks, > Cole