Due to this low active current consumption, they are appropriate for battery-based applications. These products represent three families having reset threshold voltages in the 2.63V to 4.63V range to accommodate various system voltages viz. This feature allows a push-button to be directly connected to its reset output, to manually generate a reset without adding logic or extra pins. The FM809 and FM1223 feature an active low reset polarity while the FM810 features an active high reset polarity. The standard offering has reset pulse duration of 256ms, but other reset pulse choices from 32 to 128 ms are available upon request.
Customers are also able to order products with custom voltage threshold settings.
They offer a strict voltage control comparator and reset capability, with active high or active low reset, and a selection of voltage reset delays from 32 ms to 256 ms with the factory standard of 256 ms. But upon closer inspection you discover that this supervisory IC consumes only 2 microamps compared with the 6 to as much as 45 microamps used by competing designs. That could be significant if you are placing the chip into cell phones that need to squeeze every bit of juice out of the battery. Typical applications include microcontrollers, microprocessors, DVD players, automotive systems, portable equipment, and cell phones. The circuits monitor power supply or other system voltages and issue reset pulses when a fault condition exists.