General Description
The G692/G693 are microprocessor (μP) supervisory
circuits used to monitor the power supplies in μP 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- powered
circuits. The G692/G693 also provides a debounced
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 230ms 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 G693L’s 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
comparator 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.
Low supply current makes the G692/G693 ideal for use
in portable equipment. The G692/G693 are available in
a SOT-143, SC-70-5(SOT-353), SOT-23-5 packages.