The quad voltage microprocessor supervisory IC from austriamicrosystems is designed to monitor up to four system supply voltages without the need for external components. It asserts a single reset if any of the monitored supply voltages drops below its reset threshold. A variety of different factory-trimmed voltage threshold options are available for monitoring +5.0, +3.3, +3.0, +2.5, +1.8, and -5.0V supplies with -5% and/or -10% tolerances.
The AS1923 is also available with one or two user-adjustable threshold options (via external resistor-divider network) if non-standard voltage thresholds are required. The internally trimmed thresholds and the two reset output options minimize the need for external components. The open-drain output can be overdriven by external voltages ranging from 0V to +5.5V to provide easy interfacing to other devices.
Austriamicrosystems, www.austriamicrosystems.com
