74221 Dual monostable multivibrators with Schmitt-trigger inputs. +----------+ /1TR |1 +--+ 16| VCC 1TR |2 15| 1RCext /1RST |3 14| 1Cext /1Q |4 74 13| 1Q 2Q |5 221 12| /2Q 2Cext |6 11| /2RST 2RCext |7 10| 2TR GND |8 9| /2TR +----------+ [This information is part of the GIICM]