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DS21448LN DS21448 DS21448LN+ 四端口E1或T1線路接口單元(LIU)有現貨 可添加我們聯系方式獲取最優惠價格
原廠原包原標原裝每一片都來自正規渠道每一片都可追溯
數據手冊：DS21448 3.3V E1/T1/J1、4端口線路接口單元，用于短程或長程通信系統 .pdf [英文Rev.3(PDF,836kB)]
{狀況：生產中。詳細情況請參考訂購信息。}
DS21448是一款四端口E1或T1線路接口單元(LIU)，適用于短程和遠程應用。它將四個獨立的發送器與四個獨立的接收器整合到一片144引腳PBGA或128引腳LQFP封裝內。發送驅動器可在75Ω或120Ω應用中產生滿足G.703 E1要求的波形，對于T1應用提供0dB、-7.5dB、-15dB和-22.5dB的DSX-1或CSU線路補償。
產品關鍵特性
四個完整的E1、T1或J1 LIU
支持長距離與短距離主干線
內部軟件可選接收側終端，以用于75Ω/100Ω/120Ω
3.3V電源供電
32位或128位晶體抖動衰減器，在E1與T1應用中僅需一個2.048MHz MCLK，在T1應用中也可以選擇采用1.544MHz MCLK
對于E1，產生有或沒有回波損耗的線路補償，對于T1，產生DSX-1與CSU線路補償
AMI、HDB3與B8ZS編碼/解碼
16.384MHz、8.192MHz、4.096MHz或2.048MHz時鐘輸出合成自恢復時鐘
接收器可編程監視器模式
環回和PRBS碼型產生/檢測具有接收誤碼輸出
產生/檢測帶內環路碼，1至16位，包括CSU環路碼
具有可選硬件模式的8位并行或串行接口
復用或非復用的并行總線支持Intel或Motorola模式
檢測/產生藍色(AIS)告警
Tx/Rx數據I/O采用NRZ/雙極型接口
發送器開路檢測
接收載波丟失(RCL)指示(G.775)
TTIP與TRING具有高阻態
50mARMS發送電流限制器
JTAG邊界掃描測試端口符合IEEE 1149.1
滿足最新的E1與T1規范，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與CTR4
應用與使用范圍
局端交換與PBX接口
集成多業務接入平臺
T1/E1交叉鏈接、多路復用器和信道備份
T1/E1 LAN/WAN路由器
無線基站
原理框圖
DS21448 原理框圖
芯片訂購型號
訂購型號 產品狀態 封裝形式 工作溫度 RoHS/無鉛
DS21448 生產中 TEPBGA；144引腳；289mm2封裝信息 0°C至+70°C
DS21448-LW 停止供貨 LQFP；128引腳；359.6mm2封裝信息 0°C至+70°C
DS21448G+ 生產中 TEPBGA；144引腳；289mm2封裝信息 -40°C至+85°C
DS21448GN+ 生產中 TEPBGA；144引腳；289mm2封裝信息 -40°C至+85°C
DS21448L 停止供貨 DS21448L+ LQFP；128引腳；359.6mm2封裝信息 0°C至+70°C
DS21448L+ 生產中 LQFP；128引腳；359.6mm2封裝信息 0°C至+70°C
DS21448LN 停止供貨 DS21448LN+ LQFP；128引腳；359.6mm2封裝信息 -40°C至+85°C
DS21448LN+ 生產中 LQFP；128引腳；359.6mm2封裝信息 -40°C至+85°C
DS21448N 生產中 TEPBGA；144引腳；289mm2封裝信息 -40°C至+85°C
評估板與開發套件
DS21448DK 3.3V、E1/T1/J1線路接口開發板子卡
相關芯片型號
DS21448DK 3.3V、E1/T1/J1線路接口開發板子卡
Datasheet
DS21448 : 3.3V、E1/T1/J1四線路接口 DS21448
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