AS1904A22

Supervisors Overview

The AS1904A22 is an ultra low-power microprocessor supervisory circuit manufactured by ams OSRAM. It monitors supply voltages in digital systems and initiates a reset when voltage drops below a predefined threshold. The device features a typical supply current of 150nA, ensuring minimal power consumption. Reset duration is typically 5ms after the supply voltage rises above the threshold. This component eliminates external components to reduce application costs.

Supervisors Feature Summary

• Ultra low-power operation with typical 150nA supply current
• Monitors supply voltage and initiates reset upon threshold drop
• Eliminates need for external components to reduce cost

Supervisors Applications

• Monitoring supply voltage of digital systems
• Microprocessor reset initiation
• Low-power embedded applications

Supervisors Procurement Notes

Verify the manufacturer designation carefully, as documentation indicates austriamicrosystems AG is now ams AG. Confirm the specific suffix 'A22' matches your required threshold and package requirements. Check for obsolescence status, as some listings indicate this part may be discontinued or have limited availability. Ensure compatibility with your system's voltage levels before procurement.

Supervisors Selection Notes

Select this component for applications requiring minimal quiescent current during monitoring. The fixed 5ms reset delay suits systems where rapid recovery is not critical. Verify that the predefined threshold voltage aligns with your system's minimum operating voltage. Consider the package type availability if space constraints exist. This device is suitable for battery-powered or energy-sensitive designs.

Supervisors Part Context

The AS1904A22 belongs to the AS1904/5/6 family of supervisory circuits. These devices are designed for reliability and cost reduction in digital systems. The family offers different output drivers and reset durations. The AS1904 variant specifically provides a 5ms typical reset time. This family replaces discrete solutions with a single integrated component.

Supervisors Replacement Considerations

Check datasheets for equivalent parts from other manufacturers offering similar 150nA supply current and 5ms reset times. Verify pin compatibility and threshold voltage specifications. Ensure the replacement supports the same supply voltage range. Confirm package dimensions match existing PCB layouts.