The TSOP31#.. series are miniaturized receivers for infrared remote control systems. A PIN diode and a preamplifier are assembled on a lead frame, the epoxy package acts as an IR filter. The demodulated output signal can be directly decoded by a microprocessor. The TSOP311.. is compatible with all common IR ... remote control data formats. The TSOP313.. is optimized to better suppress spurious pulses from energy saving fluorescent lamps but will also suppress some data signals.