Touch Screens Ideal For Automotive Applications

Cypress Semiconductor has announced the qualification of its Truetouch touchscreen and LIN-capable Capsense touch-sensing controllers for automotive applications such as GPS and keyless entry. The devices, based on Cypress's flagship PSoC programmable system-on-chip architecture, meet AEC-Q100 standards. The CY8C2x345 Capsense controllers pair analogue resources with automotive industry standard LIN communication support, making the devices ideal system controllers to interface with analogue and capacitive touch-sensor inputs, and to control backlight LEDs and haptic actuators while communicating over the LIN bus.

Cypress has also announced that Grace Semiconductor in Shanghai, China, has been qualified to fabricate automotive-grade CY8C2x345 Capsense controllers that adhere to the AEC-Q100 standard, ISO/TS 16949 quality management standard and Cypress's Zero-Defect manufacturing system. The Truetouch controllers, which are available in single-touch, multi-touch gesture and multi-touch all-point offerings, provide the ability to track multiple fingers simultaneously. They are able to control screen sizes up to 9in and are designed for use in control panels, GPS and infotainment displays.

The company's automotive-qualified Capsense devices enable attractive, highly functional interfaces with improved durability over mechanical buttons and sliders. Their reliability, noise-immunity and water resistance are said to deliver superior performance in the harsh automotive operating environment. Capsense proximity sensing offers a detection range up to 25cm, saving power by activating an interface only when needed. The devices are ideal for interior automotive applications such as audio, navigation, AC control and lighting control, as well as exterior applications such as trunk release and passive keyless-entry buttons.

Cypress's Capsense devices offer dual-channel scanning, delivering faster scan times for multiple I/Os. These devices offer automotive industry standard LIN 2.0 and 2.1 communication support. Cypress offers two types of the automotive devices: A grade (-40C to +85C) and E grade (-40C to +125C). Available on-chip analogue resources include a SAR ADC. Cypress's Truetouch is a flexible touchscreen architecture that allows designers to implement differentiated features and make last-minute design iterations without board changes.

They have a choice of using touch sensors (glass or film) and LCDs from preferred partners, and can develop mechanical designs ranging from flat to curved surfaces of varying thickness. In addition, Truetouch devices offer Cypress's noise immunity with patented capacitive sensing technology that enables good operation in noisy RF and LCD environments.

Cypress's automotive portfolio also includes parallel and serial non-volatile SRAMs, asynchronous fast SRAMs, asynchronous micropower SRAMs, synchronous SRAMs, timing solutions, and USB hosts, hubs and peripherals. The CY8CTMG120 multi-touch gesture and CY8CTMA120 multi-touch all-point controllers are available for sampling in 56-pin QFN packages. The Capsense products include the LIN-capable CY8C2x345 devices, available for sampling in A grade (-40C to +85C) in 28-pin SSOP packages with the 48-pin SSOP packages planned in Q3 2010. All products are expected to be in full production in Q3 2010.

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