MIC845

MIC845 Micro-Power Comparator / Battery Monitor General Description The MIC845 is a precision micro-power voltage comparator with an on-chip 2.55V reference voltage source. Intended 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 incorporates a voltage reference and comparator with fixed internal hysteresis. When the 2.55V internal threshold is crossed, the output switches polarity. 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; the open-drain output stage is only configured active high. Supply current is extremely low (typically 1µA), making it ideal for portable applications. MIC845 is supplied in Micrel’s Teeny™ 5-lead SC70 package. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Teeny™ Features Extremely low 1µA supply current (typical) 2.55V on chip reference ±2% voltage threshold accuracy Optimized for PDAs, cellular telephones, pagers, and other battery-powered devices Open-drain output can be pulled up to 6V regardless of supply voltage 5-lead SC-70 package Applications PDAs Pagers Cordless phones Portable electronics Motherboards Bladed servers ______________________________________________________________...