Voice Switched Speakerphone Circuit with Speaker Amplifier
The NJW1128 is a Voice Switched Speakerphone Circuit. It includes all of functions processing a high quality handsfree speakerphone system, such as the necessary amplifiers ( Mic , Receive ,Line, Speaker ), attenuators, level detectors functions.The NJW1128 is controllable independently power-down of the speaker amplifier and the entire IC excluding the speaker amplifier.All external capacitors are sufficient small so that ceramic capacitors are applied.
- Video Door Phone
- Conference System
- Wireless Application
- Security System
Consumer Supply Voltage 3.9V to 5.5V Structure Bi-CMOS Technology Wide Operating Temperature -40℃ to +85℃ Junction Temp. +125℃ Package LQFP48-R3 Attenuator gain range between Transmit and Receive 52dB Note Speaker amplifier
Microphone amplifier with mute function
Force to Receive, Transmit, or Idle modes
Background noise monitor for each path
Speaker switch Pin power down the speaker amplifier
4-point signal sensing
Chip disable Pin powers down the entire IC excluding
Microphone and Receive Amplifiers pinned out for flexibility
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
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