TS7221 is a single BiCMOS device with rail-to-rail inputs and open drain output. It operates from 2.7 to 10 V and has a typical supply current of 6 µA at 5 V. The response time is 0.5 µs at 5 V. It has low input current and ESD protection of 2 kV. It is suitable for battery-powered systems, notebooks and PDAs, PCMCIA cards, cellular and mobile communications, alarms and security systems, and can be used as a replacement for amplifiers in comparator configurations for improved performance.