Low Power Triple Voltage µP Supervisor Added by austriamicroystems

The low power AS1920/AS1922 family of µP supervisor circuits has been announced by austriamicrosystems. Consuming 6.2µA, the new family of triple voltage µP supervisory circuits is designed for battery-powered equipment, computers, intelligent instruments, critical µP and µC power monitoring, controllers and automotive applications.

"Field programmable gate arrays typically require multiple supply voltages. For example, systems with core, I/O peripherals and memory require three supply voltages. For these systems to function reliably, each supply must be monitored to ensure it is within its valid operational range," said Walter Moshammer, marketing director for standard linear at austriamicrosystems. "Delivering 1.5% accuracy, and ensured to be in the correct state for VCC higher than +1.0V, the AS1920/AS1922 family is ideally suited to these needs."

The devices offer the ability to monitor three voltages with up to ±1.5% threshold accuracy and glitch immunity. In addition, the new ICs are available with factory trimmed +3V primary and secondary +1.8Vreset, while a third input can be user adjusted via external resistors. The reset is maintained for a minimum timeout period after all supplies are above their reset thresholds.

The devices are available in a small 5-pin SOT23 package with the reset output types of active-low push/pull (AS1920) and active-low open-drain (AS1922).