NCS200x Rail-to-Rail Operational Amplifiers onsemi NCS200x Rail-to-Rail Operational Amplifiers provide rail-to-rail output operation, and are available in single, dual, and quad configurations. Rail-to-rail operation enables the user to make optimal use of the entire supply voltage range while taking advantage of bandwidth. onsemi NCS200x can operate on supply voltages from 1.8V to 5.5V over the temperature range of −40°C to +125°C.