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Interface IC from TI improves tablet design

14 May 2013

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Texas Instruments Inc. (TI) has unleashed a couple of devices that the company said enhances tablet design. The TCA8424 is touted by the firm as the industry's first human interface device (HID) over I2C, 128-key keyboard controller that eliminates the need to program the device at production, simplifying design and speeding time-to-market. It also provides a cost-effective and seamless way to interface keyboards with Windows 8-based systems. The SN65DSI85 is a digital serial interface (DSI) to FlatLink interface IC that the firm said makes it easier and more cost-effective for designers to connect graphics processors to LCD panels. It supports screen resolutions up to 2560 by 1600p in tablets, netbooks and mobile internet devices, detailed the company.

According to the company, the TCA8424 has up to 128 (8 x 16) key scan that supports standard keyboard plus additional custom keys such as volume control, brightness control and forward/back/stop/reload/home. It also features fixed-length, eight-byte input report, only available from TI, which can detect up to 14 simultaneous key presses including modifiers, allowing the end equipment to be used in applications such as gaming.

The SN65DSI85 boasts a dual 4-lane MIPI DSI port to dual link 18/24bpp FlatLink that is compatible with a range of graphics processors up to WQXGA (2500 x 1600p) resolution at 60fps. Its 5 x 5mm PBGA package is 20-per cent smaller than competitive devices, saving PCB area in space-constrained mobile applications, indicated the company. TI added that the device has an LVDS pixel clock that operates up to 154MHz, which is 20 per cent higher than the competition. Each DSI lane runs at 1Gb/s, offering a maximum input bandwidth of 8Gb/s for industry-leading data throughput.

The TCA8424 is available in a 6 x 6 x 1mm 40-pin VQFN package. Suggested retail pricing is $0.80 in 1,000-unit quantities. The SN65DSI85 is available in a 5 x 5 x 1mm, 64-ball PBGA package. Suggested retail pricing is $3.90 in 1,000-unit quantities.




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