TrueTouch® CYTT21X/31X, available in 44-, 48-, and 56-pin QFN packages, enable thin-profile smartphones, e-readers, and tablets to offer multiple advanced features. While CYTT31X supports input from passive stylus with tip as fine as 2.5 mm, CYTT21X supports face detection feature that prevents unintended touches from hanging up call. Controllers leverage Cypress Single-Layer Independent Multi-touch (SLIM®) sensor structures and automatically switch between glove, stylus, and finger tracking.