74121 Monostable multivibrator with Schmitt-trigger inputs. Programmable output pulse width from 40 ns to 20 seconds. +----------+ /Q |1 +--+ 14| VCC |2 13| /TR1 |3 74 12| /TR2 |4 121 11| RCext TR |5 10| Cext Q |6 9| Rint GND |7 8| +----------+ [This information is part of the GIICM]