The Microchip Technology Inc. MCP6561/1R/1U/2/4 families of CMOS/TTL-compatible comparators are designed for low-power 1.8V, single-supply applications. These comparators offer rail-to-rail input operation and internal hysteresis to reduce current draw. The push-pull output supports rail-to-rail output swing and interfaces with CMOS/TTL logic, enabling a typical output toggle frequency of 4 MHz while limiting supply current surges. Operating with a single-supply voltage of 1.8V to 5.5V, these comparators draw less than 100 µA/comparator of quiescent current, making them suitable for battery-powered devices and power-sensitive applications.