These devices are precision timing circuits for generation of accurate time delays or oscillation. Advanced circuit design means that these devices can operate from a single battery cell with the minimum of quiescent current. In monostable mode time delays are controlled by a single resistor and capacitor network. In astable mode the frequency and du t y cy c l e c a n be a c c u r a t e l y an d independently controlled with two external resistors and one capacitor.