DESCRIPTION

The UTC USS809 series are resetting circuits which can

monitor power supplies especially in microprocessor based

systems.

In normal operation, the UTC USS809 series can assert a reset

under any of the following situation: the power supply drops below

a designated reset threshold level (which is available for 3V or

3.3V or 5V system).

Active low RESET output which has already been guaranteed

to remain asserted for at 140ms least while VCC rises above the

designed threshold level.

FEATURES

* Voltage monitor for 3V or 3.3V or 5V power supplies

* Valid RESET remains with VCC as low as 1V

* Typical supply current: 5µA

* Fixed 140ms minimum reset pulse width

* Push-Pull RESET Active Low Output