General Description
The PA4101 is a low power monolithic CMOS mixed signal device. Its function is to control power supply transition noise in audio circuits and systems. It requires very few external components for its operation and works from low to medium power supply voltages of 2.7V to 5.5V. As the power supply ramps ON or OFF, the PA4101 ensures that audio inputs to succeeding amplifiers are switched to a convenient low impedance voltage rail. This causes the amplifiers to remain silent as the power supply changes state (from ON to OFF and vice versa).

FEATUREs
• Precision supply voltage monitoring
• Reset Timeout Delay
• 36dB mute attenuation
• 2.7V to 5.5V single-supply operation
• ESD protected outputs
• Low supply current
• Soft Mute out for driving additional channels
• SOIC 14

APPLICATIONs
• Set-top boxes
• Cell phones
• PDA’s
• Portable DVD players
• Portable MP3 players
• Notebook Audio
• Critical µP Power Monitoring