4-pin Up Voltage Monitors With Manual Reset Input

The 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