HT9274 --Quad Micropower Op Amp General Description It allows common mode input voltage range which extends below the negative rail, output swings to both rails with a reasonable sink and souce capability of the output drive current. This cost-effective device is suitable for high gain, low frequency, low power applications, especially ideal for battery powered systems where uA range of standby current is essential for long battery life span. For example, in multi-standard Caller ID systems, HT9274 is ideal as a low power line signal monitor/detector, and in car alarm systems, the HT9274 is excellent for piezo vibratile detector signal amplifier application. Features Quad micro power op amp Wide range of supply voltage: 1.6V~5.5V High input impedance Single supply operation Low current consumption: 5uA per amp Rail to rail output Provides both sink and source output drive capability Common mode input extends below negative rail Pin compatible with LM324/WT274 (14-pin DIP)