Outline
This IC was developed for use in mobile communication equipment. It is a compander IC incorporating compressor/expander circuits for a significant noise reduction effect without complicated external circuitry. On the transmission side, the dynamic range of audio signals is compressed by the compressor circuit; on the receiving side, the expander expands the signals. As a result the dynamic range over the transmission channel is reduced logarithmically by one-half.

Features
1. Can be driven at low voltages (down to 2.4V)
2. Compression and expansion circuits enable suppression of unwanted radio waves
3. Consumption current 2.8mA typ.

Applications
1. Cordless telephones
2. Various mobile communication devices