Hi Jürgen and List! >> ST Microelectronics HCF4068B too... > >Yes, but this is HCMOS, no 15V logic. No, ST prefixes their 4000B series with "HCF". It would be "74HC-something" otherwise. Cheers, René -- uzs159 at uni-bonn.de http://www.uni-bonn.de/~uzs159