Pushbutton-Controlled Trimpot Ics

The DS1809 and DS1869 ICs are electronically controlled trimpots that can be adjusted in 64 linear steps using up and down pushbuttons. Since they hold their settings via built-in EEPROMs when the power is switched off, they can be used in place of mechanical trimpots. Values of 10 k?, 50 k? and 100 k? are available. The supply voltage may lie between +3 V and +5 V or +8 V, respectively. The voltages on the three connections RH, RL and RM may not be more than 0.5 V higher than the supply voltage, nor more than 0.5 V negative.