Abstract: A low-power circuit formed with resistors, capacitors, a pushbutton switch, and two comparators serves as a toggle switch that directly drives loads up to 40mA, providing a known state following power up, battery insertion, or system timeout. Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS Keywords: semiconductor toggle switch, on-off switch, single button, portable equipment, portable devices, May 03, 2004 toggle switch, latching function, comparator APPLICATION NOTE 3223 Semiconductor Toggle Switch A low-power circuit formed with resistors, capacitors, a pushbutton switch, and two comparators serves as a toggle switch that directly drives loads up to 40mA, providing a known state following power up, battery insertion, or system timeout. We are all used to single button on-off switches on portable appliances such as mobile (cellular) phones. The single button has several advantages over a toggling switch that delivers battery power directly to the electronics: q It takes up less front panel space. ……