Comparator with 2.55V source

The new precision micro-power voltage comparator from Micrel Semiconductor features an on-chip 2.55V reference voltage source. Designed for voltage monitoring applications, the MIC845 can be used with an external resistor divider to detect a wide range of voltages, or without external resistors to directly monitor voltages with its high input impedance CMOS input.

The MIC845 features a 1?A (typ) supply current and ±2 percent voltage threshold accuracy, and incorporates a voltage reference and comparator with fixed internal hysteresis. When the 2.55V internal threshold is crossed, the output switches polarity. Open-drain output can be pulled up to 6V regardless of supply voltage, added Micrel.

Designed for PDAs, cell phones, pagers and other battery-powered devices, the MIC845 is available with a push-pull or open-drain output stage. The push-pull output stage is configured for both active high or active low output, while the open-drain output stage is only configured active high.

The MIC845 is housed in the company's 5-lead SC-70 package.