This part is a kind of semiconductor called UTC571N.

Function of this product has COMPANDOR.

Manufacturers : UTC

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UNISONIC TECHNOLOGIES CO., LTD UTC571N LINEAR INTEGRATED CIRCUIT COMPANDOR  DESCRIPTION The UTC571N is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a full-wave rectifier to detect the average value of the signal, a linerarized temperature-compensated variable gain cell and an operational amplifier. The UTC571N is well suited for use in cellular radio and radio communication systems, modems, telephone, and satellite broadcast/receive audio systems.  FEATURES * Complete compressor and expandor in one Chip * Temperature compensated * Greater than 110dB dynamic range * Operates down to 6VDC * System levels adjustable with external components * Distortion may be trimmed out * Dynamic n [ ... ]

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