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IC eases universal remote control code learning

Posted: 31 Jul 2012     Print Version  Bookmark and Share

Keywords:remote control  IR  optoelectronics 

Vishay Intertechnology Inc. unveils the VSOP98260, a remote control code learning IC that integrates signal detection and processing into one component. The device is optimised for universal remote controllers.


It simplifies the code learning process by amplifying and shaping the signal received by the IR emitter already present in remote controls. The VSOP98620 also can be used in tablet PCs and smartphones that are enabled with an IR emitter.

To transmit valid commands, universal control devices must learn the modulation frequency and pulse patterns for each appliance being controlled. The most intuitive method for teaching them the correct code is to use the appliance's remote control, placing it nose-to-nose with the universal controller. When a key is pressed, the infrared emitter transmits the pulses associated with this function and the universal controller receives the code and stores it in memory.

Before the VSOP98260, signal detection and processing functions for code learning in universal control devices required discrete solutions. By combining these functions into one component, the IC released today simplifies designs in these devices, saving space and reducing overall costs. The output from the VSOP98260 accurately corresponds to the carrier frequency and data burst length of the input signal while being immune to noise from other light sources such as compact fluorescent lamps.

The VSOP98260 can receive any carrier frequency from 20kHz to 60kHz, and it operates on a supply voltage from 2V to 3.6V and a supply current of 0.6mA to 0.9mA. The chip comes in a RoHS-compliant 2mm x 2mm x .7mm QFN package. It operates from -25°C to +85°C and is compliant to WEEE 2002/96/EC, free of halogens, and compatible with Pb-free soldering.

Samples and production quantities of the new VSOP98260 IC are available now, with a lead time of six weeks for large orders.

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