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DS21448LN DS21448 DS21448LN+ 四端口E1或T1线路接口单元(LIU) 有现货 可添加我们联系方式获取最优惠价格
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数据手册：DS21448 3.3V E1/T1/J1、4端口线路接口单元，用于短程或长程通信系统 .pdf [英文Rev.3(PDF,836kB)]
{状况：生产中。详细情况请参考订购信息。}
DS21448是一款四端口E1或T1线路接口单元(LIU)，适用于短程和远程应用。它将四个独立的发送器与四个独立的接收器整合到一片144引脚PBGA或128引脚LQFP封装内。发送驱动器可在75Ω或120Ω应用中产生满足G.703 E1要求的波形，对于T1应用提供0dB、-7.5dB、-15dB和-22.5dB的DSX-1或CSU线路补偿。
产品关键特性
四个完整的E1、T1或J1 LIU
支持长距离与短距离主干线
内部软件可选接收侧终端，以用于75Ω/100Ω/120Ω
3.3V电源供电
32位或128位晶体抖动衰减器，在E1与T1应用中仅需一个2.048MHz MCLK，在T1应用中也可以选择采用1.544MHz MCLK
对于E1，产生有或没有回波损耗的线路补偿，对于T1，产生DSX-1与CSU线路补偿
AMI、HDB3与B8ZS编码/解码
16.384MHz、8.192MHz、4.096MHz或2.048MHz时钟输出合成自恢复时钟
接收器可编程监视器模式
环回和PRBS码型产生/检测具有接收误码输出
产生/检测带内环路码，1至16位，包括CSU环路码
具有可选硬件模式的8位并行或串行接口
复用或非复用的并行总线支持Intel或Motorola模式
检测/产生蓝色(AIS)告警
Tx/Rx数据I/O采用NRZ/双极型接口
发送器开路检测
接收载波丢失(RCL)指示(G.775)
TTIP与TRING具有高阻态
50mARMS发送电流限制器
JTAG边界扫描测试端口符合IEEE 1149.1
满足最新的E1与T1规范，包括ANSI.403-1999, ANSI T1.408, AT&T TR 62411, ITU G.703, G.704, G.706, G.736, G.775, G.823, I.431, O.151, O.161, ETSI ETS 300 166, JTG.703, JTI.431, TBR12, TBR13与CTR4
应用与使用范围
局端交换与PBX接口
集成多业务接入平台
T1/E1交叉链接、多路复用器和信道备份
T1/E1 LAN/WAN路由器
无线基站
原理框图
DS21448 原理框图
芯片订购型号
订购型号 产品状态 封装形式 工作温度 RoHS/无铅
DS21448 生产中 TEPBGA；144引脚；289mm²封装信息 0°C至+70°C
DS21448-LW 停止供货 LQFP；128引脚；359.6mm²封装信息 0°C至+70°C
DS21448G+ 生产中 TEPBGA；144引脚；289mm²封装信息 -40°C至+85°C
DS21448GN+ 生产中 TEPBGA；144引脚；289mm²封装信息 -40°C至+85°C
DS21448L 停止供货 DS21448L+ LQFP；128引脚；359.6mm²封装信息 0°C至+70°C
DS21448L+ 生产中 LQFP；128引脚；359.6mm²封装信息 0°C至+70°C
DS21448LN 停止供货 DS21448LN+ LQFP；128引脚；359.6mm²封装信息 -40°C至+85°C
DS21448LN+ 生产中 LQFP；128引脚；359.6mm²封装信息 -40°C至+85°C
DS21448N 生产中 TEPBGA；144引脚；289mm²封装信息 -40°C至+85°C
评估板与开发套件
DS21448DK 3.3V、E1/T1/J1线路接口开发板子卡
相关芯片型号
DS21448DK 3.3V、E1/T1/J1线路接口开发板子卡
Datasheet
DS21448 : 3.3V、E1/T1/J1四线路接口 DS21448
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