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Low-threshold MPU supervisory circuits tout low power

Unterpremstaetten, Austria—austriamicrosystems has expanded its supervisory portfolio with the AS1925 and AS1926 single ultra-low voltage microprocessor (MPU) 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°C to +85°C.

Pricing: 24 cents each in 1,000-unit quantities.
Availability: Now.
Datasheet: click here.

austriamicrosystems AG,+43 3136 500-0, www.austriamicrosystems.com

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