Monitoring supplies between 0.9V to 1.5V, the AS1925 and AS1926 are ideal for monitoring low-voltage core supplies or single-cell battery applications

austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of analog integrated circuits (ICs) for communications, industrial, medical and automotive applications, today expanded its supervisory portfolio with the AS1925 and AS1926 single ultra low voltage microprocessor supervisory ICs.

The AS1925/26 were designed to monitor supply rails of 0.9V to 1.5V in µP and digital systems, without the need for external components, and forces a reset if the monitored supply voltage drops below its reset threshold.

A variety of different factory-trimmed voltage thresholds from 0.81V to 1.425V are available for monitoring 0.9V, 1.2V and 1.5V supplies with 5% or 10% tolerances. The preset voltages can be monitored without external components.

The AS1925 features both a push-pull active-high and active-low reset output. On the other hand the AS1926 offers a push-pull active-high and an open-drain active-low reset output. Resets can be forced for a specified reset timeout period, such as 1.5ms, 30ms, 210ms and 1.68s, after the voltage has stabilized. The active-low output is valid as long as the supervised input voltage remains >0.55V. The AS1925 and AS1926 operate from +0.55V/0.75V to +1.8V, while consuming only 3.5µA of supply current.

The devices are available in a small 5-pin SOT23 package suitable for operating environments ranging from -40¡ãC to +85¡ãC.