4-pin Up Voltage Monitors With Manual Reset InputThe G692 G693 are Microprocessor (P) supervisory
circuits used to monitor the power supplies in P and
digital systems. They provide excellent circuit reliability
and low cost by eliminating external components and
adjustments when used with +5V, +3.3V, +3.0V- pow-
ered circuits. The G692 G693 also provide a de-
bounced manual reset input.
These circuits perform a single function: they assert a
reset signal whenever the VCC supply voltage declines
below a preset threshold, keeping it asserted for at
least 140ms after VCC has risen above the reset
threshold. Reset thresholds suitable for operation with
a variety of supply voltages are available.
The G693L has an open-drain output stage, while the
G692 have push-pull outputs. The G693Ls open-drain
RESET output requires a pull-up resistor that CAN be
connected to a voltage higher than VCC. The G692L
have an active-low RESET output, while the G692H
has an active-high RESET output. The reset com-
parator is designed to ignore fast transients on VCC,
and the outputs are guaranteed to be in the correct
Logic state for VCC down to 1V. By Unkown
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