Maxim DS3170 DS3-E3单片收发器解决方案

Maxim公司的 DS3170是 DS3-E3单片收发器，包括了DS3/E3成帧器和LIU，能以长度380米/1246英尺（DS3）或440米/1443英尺（E3）接口到75欧姆的同轴电缆，在接收端RX和发送端TX采用1:2变压器， 器件内集成了DS3 (M23 或C-Bit)和 E3 (G.751 或G.832)成帧器，主要用在接入集线器，多服务接入平台，ATM和帧中继设备，路由器和交换，SONET/SDH ADM，PBX，PDH复接器/分路器，测试设备和综合接入设备。本文介绍了DS3170主要特性，方框图，DS3/E3线路卡框图，DS3170DK 单片收发器评估板主要特性，电路图和材料清单。
DS3170：DS3/E3 Single-Chip Transceiver
The DS3170 combines a DS3/E3 framer and an LIU (single-chip transceiver) to interface to a DS3/E3 physical copper line.
The DS3170 is a software-configured, DS3/E3, single-chip transceiver (SCT). The line interface unit (LIU) has independent receive and transmit paths. The receiver LIU block performs clock and data recovery from a B3ZS- or HDB3-coded AMI signal and monitors for loss of the incoming signal, and can be bypassed for direct clock and data input. The receiver LIU block optionally performs B3ZS/HDB3 decoding. The transmitter LIU drives standard pulse-shape waveforms onto 75Ω coaxial cable and can be bypassed for direct clock and data output. The jitter attenuator can be put in the transmit or receive data path when the LIU is enabled. Built-in DS3/E3 framers transmit and receive data in properly formatted C-bit DS3, M23 DS3, G.751 E3 or G.832 E3 data streams. Functions not used are powered down to reduce system power requirements.
DS3170主要特性：
Single-Chip Transceiver for DS3 and E3
Performs Receive Clock/Data Recovery and Transmit Waveshaping for DS3 and E3
Jitter Attenuator can be Placed Either in the Receive or Transmit Path
Interfaces to 75Ω Coaxial Cable at Lengths Up to 380 Meters or 1246 Feet (DS3), or 440 Meters or 1443 Feet (E3)
Uses 1:2 Transformers on Both Tx and Rx
On-Chip DS3 (M23 or C-Bit) and E3 (G.751 or G.832) Framer
Built-In HDLC Controller with 256-Byte FIFO for the Insertion/Extraction of DS3 P...