RF Solutions has introduced a pair of encoder/decoder ICs for radio-control applications, featuring three independent I/O lines and allowing direct connection of an RF module to simplify design.

Switches can be connected directly to the encoder inputs and decoder outputs will drive relays or buzzers directly.

The RF803E encoder has three inputs for connection to an array of switches or pushbuttons. Its standard TTL/CMOS output can be connected directly to the data input of an RF transmitter module. When any of the inputs is asserted the encoder wakes from its 0.1nA idle mode, encodes the detected combination of inputs, and prepares a packet for RF transmission. 

The RF803D decoder, which is used at the receive end of the radio link, connects directly to the output of a receiver module. The RF803D decodes valid transmissions and asserts its three digital outputs to match the RF803E inputs. Each output can supply 25mA to drive a device such as an LED indicator, buzzer, or small relay, and can be configured for momentary or latching operation. 

Both devices operate from a supply voltage from 1.5V to 5.5V.

See http://www.rfsolutions.co.uk