GENERAL DESCRIPTION
The NJW1124 is a Voice Switched Speakerphone Circuit. NJW1124 includes all of functions processing a high quality handsñfree 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.

FEATURES
• Operating voltage range 2.9 to 4.5V
• Force to Receive, Transmit, or Idle modes
• Mode ñwatching monitor
• Attenuator gain range between Transmit and Receive 52dB
• Microphone amplifier with mute function
• Background noise monitor for each path
• Volume control range 40dB
• 4-point signal sensing
• Microphone and Receive Amplifiers pinned out for flexibility
• Package Outline SSOP32

APPLICATION
•Video Door Phone
•Conference System
•Wireless Application
•Security System