A large selection of factory-trimmed voltage thresholds is available, from 1.6V to 5.7V in 100mV increments. This broad range allows designers to specify the exact voltage threshold they need to meet specific design requirements.
In addition, engineers can program the time delay between when the monitored voltage returns to normal and when the detector deactivates its alarm output. Only one external capacitor is needed to program the delay, which provides flexibility and simplifies design. The STM1831 also draws as little as 0.8uA typical supply current, allowing use in low-power applications such as battery-operated equipment.
Major features of the STM1831:
* ±2% voltage threshold accuracy
* Operating voltage 1.6V to 6.0V
* Open-drain output
* Power supply transient immunity
* Operating temperature range: -40°C to +85°C
The STM1831 is in production now, in the SOT23-5 5-pin package, priced at $0.245 in quantities of 1000. Alternative pricing options are available for larger quantities. Additionally, a variant of the device offering a threshold voltage of 1.18V is currently sampling to lead customers and will be available in production quantities in April 2011.