Quad T1/E1/J1 Transceivers

GENERAL DESCRIPTION The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configured for T1, E1, or J1 operation. Each is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via a

文件：1.65296 Mbytes 頁數(shù)：270 Pages

DALLAS

四路T1/E1/J1收發(fā)器

DS21455和DS21458在單芯片內(nèi)集成了四路獨(dú)立的收發(fā)器，可以用軟件配置為T1、E1或J1工作方式。每個(gè)收發(fā)器都由線路接口單元(LIU)、成幀器、HDLC控制器以及TDM背板接口組成，通過8位并行端口實(shí)現(xiàn)控制，該并行接口可以配置為Intel或Motorola總線方式。DS21455*可以直接替代過去的DS21Q55四路MCM。DS21458采用了更小的封裝(17mm CSBGA)，并對(duì)控制器接口進(jìn)行了改善，與過去的DS21Q55軟件兼容。\n *DS21455/DS21458上的JTAG功能是指所有四個(gè)收發(fā)器共用一個(gè)控制器，而DS21Q55則不同，它采用的是每個(gè)收發(fā)器一個(gè)JTAG控制器的 四路獨(dú)立的收發(fā)器，每路都具有以下功能：\n? 完整的T1 (DS1)/ISDN-PRI/J1收發(fā)器功能 \n? 完整的E1 (CEPT) PCM-30/ISDN-PRI收發(fā)器功能 \n? 為時(shí)鐘/數(shù)據(jù)恢復(fù)與整形提供遠(yuǎn)程與短程線路接口 \n? CMI編碼器/解碼器 \n? 無晶振抖動(dòng)抑制器 \n? 完全獨(dú)立的發(fā)送和接收功能 \n? 雙HDLC控制器 \n? 片上可編程的BERT發(fā)生器與檢測(cè)器 \n? 75Ω/100Ω/120Ω T1和E1接口的發(fā)送端與接收端匹配電阻可以通過內(nèi)部軟件選擇 \n? 兩個(gè)雙幀彈性緩存，可以與16.384MHz以下的異步背板連接 \n? 16.384MHz、8.192M;

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亞德諾

Package：256-BGA；包裝：管件 功能：線路接口單元（LIU） 類別：集成電路（IC） 電信 描述：IC TELECOM INTERFACE 256BGA

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亞德諾

Quad T1/E1/J1 Transceivers

GENERAL DESCRIPTION The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configured for T1, E1, or J1 operation. Each is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via a

文件：1.65296 Mbytes 頁數(shù)：270 Pages

DALLAS

Quad T1/E1/J1 Transceivers

The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configured for Tl, El, or Jl operation.Each is composed of a line interface unit(LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via an 8-bit parallel port con ? Complete T1 (DS1)/ISDN-PRI/J1 Transceiver Functionality\r\n? Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality\r\n? Short- and Long-Haul Line Interface for Clock/Data Recovery and Waveshaping\r\n? CMI Coder/Decoder\r\n? Crystal-Less Jitter Attenuator\r\n? Fully Independent Transmit and ;

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亞德諾

Package：256-BGA；包裝：管件 功能：線路接口單元（LIU） 類別：集成電路（IC） 電信 描述：IC TELECOM INTERFACE 256BGA

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亞德諾

Package：256-BGA；包裝：卷帶（TR） 功能：線路接口單元（LIU） 類別：集成電路（IC） 電信 描述：IC TELECOM INTERFACE 256BGA

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