IC MONO FEATURE PHONE EMI 44SSOP - U4090B-PFNG3Y



Features
• DC Characteristic Adjustable
• Transmit and Receive Gain Adjustable
• Symmetrical Input of Microphone Amplifier
• Anti-cl ippi ng in  Tr ansmi t Dir ectio n
• Automatic Line-loss Compensation
• Symmetrical Output of Earpiece Amplifier
• Buil t-in  Ear  Protectio n
• DTMF and MUTE Input
• Adjustable Sidetone Suppression Independent of Sending and Receiving Amplification
• Speech Circuit with Two Sidetone Networks
• Buil t-in  L ine Detectio n Circuit
• Integrated Amplifier for Loud-hearing Operation
• Anti-clipping for Loudspeaker Amplifier
• Improved Acoustical Feedback Suppression
• Power Down
• Voice Switch
• Tone Ringer Interface with DC/DC Converter
• Zero Crossing Detection
• Common Speaker for Loud-hearing and Tone Ringer
• Supply Voltages for all Functional Blocks of a Subscriber Set
• Integrated Transistor for Short-circuiting the Line Voltage
• Answering Machine Interface
• Operation Possible from 10 mA Line Currents
• Filters against EMI on Critical I/O

Applications
• Feature Phone
• Answering Machine
• Fax Machine
• Speaker Phone

Benefits
• Savings of One Piezoelectric Transducer
• Complete System Integration of Analog Signal Processing on One Chip
• Very Few External Components
• Fewer  Components for EMI  Pr otecti on