N681389中文资料语音频段编解码器数据手册Nuvoton规格书

描述 Description

The N681389 implements a single channel FXS telephone line interface optimized for short loop applications. It integrates SLCC (Subscriber Line Control Circuit) functionality with a programmable CODEC and a DC/DC controller. The SLCC supports internal ringing up to 50Vrms (4 REN) ideal for Customer Premise Equipment (CPE).  The CODEC can be configured for μ-law, A-law or 16-bit linear PCM encoding.  It also supports a comprehensive set of signaling capabilities required to supervise and control the telephone lines.  These include tone generation, ring tones, DTMF detection/ generation as well as FSK generation.  An on-chip Pulse Width Modulation (PWM) driver allows control of an inductor based DC/DC converter.  Programmable impedance and trans-hybrid balancing allow for worldwide deployment.