MC34119

HTC Korea MC34119 is a low power audio amplifier integrated circuit intended  (primarily) for telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages (2.0V minimum).  Coupling capacitors to the speaker are not required. Open loop gain is 80dB, and the  closed loop gain is set with two external resistors. A Chip Disable pin permits powering  down and/or muting the input signal. The MC34119 is available in standard 8 pin DIP  and SOP package.

MC34119 features :

• Wide operating supply voltage range (2.0V to 16V),
  Allows telephone line powered applications
• Low quiescent supply current for battery powered applications
• Chip disable input to power down the IC
• Low power-down quiescent current
• Drives a wide range of speaker loads (8.0Ω to 100Ω)
• Output power exceeds 250mW with 32Ω speaker
• Low total harmonic distortion
• Gain adjustable from below 0dB to over 46dB for voice band
• Requires few external components