Voice Switched Speakerphone Circuit

Manufacturer's part number :


Manufacturer New Japan Radio

New Japan Radio

Description :

The NJW1124 is a Voice Switched Speakerphone Circuit. NJW1124 includes all of functions processing a high quality hands free speakerphone system, such as the necessary amplifiers ( Microphone , Receive ,Line), attenuators, level detectors functions.

All external capacitors are sufficient small so that ceramic capacitors are applied.

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  • Operating voltage range (2.9 to 4.5V)
  • Force to Receive, Transmit, or Idle modes
  • Mode-watching monitor
  • Attenuator gain range between Transmit and Receive (52dB)
  • Microphone amplifier with mute function
  • Background noise monitor for each path
  • Volume control range
  • 4-point signal sensing
  • Microphone and Receive Amplifiers pinned out for flexibility
  • Package Outline (SSOP32)
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Type/ Function Voice Switched Speakerphone circuit  

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Package Outline SSOP-32