- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97866 > DS21552LN (MAXIM INTEGRATED PRODUCTS INC) DATACOM, PCM TRANSCEIVER, PQFP100 PDF資料下載
參數(shù)資料
| 型號： | DS21552LN |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Digital Transmission Interface |
| 英文描述： | DATACOM, PCM TRANSCEIVER, PQFP100 |
| 封裝： | 14 X 14 MM, LQFP-100 |
| 文件頁數(shù)： | 130/139頁 |
| 文件大?。?/td> | 1208K |
| 代理商： | DS21552LN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁當前第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁
DS21352/DS21552
90 of 137
16.4 PROTECTED INTERFACES
In certain applications, such as connecting to the PSTN, it is required that the network interface be
protected from and resistant to certain electrical conditions. These conditions are divided into two
categories, surge and power line cross. A typical cause of surge is lightening strike. Power line cross
refers to accidental contact with high voltage power wiring. For protection against surges, additional
components and PCB layout considerations are required to reroute and dissipate this energy. In a surge
event, the network interface must not be damaged and continue to work after the event. In the event of a
power line contact, components such as fuses or PTCs that can “open” the circuit are required to prevent
the possibility of a fire caused by overheating the transformer. The circuit examples in this data sheet are
for “Secondary Over Voltage Protection” schemes for the line terminating equipment. Primary protection
is typically provided by the network service provide and is external to the equipment.
Figure 16-6 shows an example circuit for the 5 volt device and Figure 16-7 is an example for the 3.3
device. In both examples, fuses are used to provide protection against power line cross. 470 ohm input
resistors on the receive pair, a transient suppresser and a diode bridge on the transmit pair provide surge
protection. Resistors R1 – R4 provide surge protection for the fuse. Careful selection of the transformer
will allow the use of a fuse that requires no additional surge protection such as the circuit shown in Figure
16-7. The circuit shown in Figure 16-7 is required for 3.3 volt operation since additional resistance in the
transmit pair cannot be tolerated. For more information on line interface design, consult the T1 Line
Interface Design Criteria (note 353) and Secondary Over Voltage Protection (note 324) application notes.
These notes are available from Dallas Semiconductor’s web site.
相關PDF資料 |
PDF描述 |
|---|---|
| DS21354L | DATACOM, PCM TRANSCEIVER, PQFP100 |
| DS21354LN | DATACOM, PCM TRANSCEIVER, PQFP100 |
| DS21372TN | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| DS21372T | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| DS21372 | SPECIALTY TELECOM CIRCUIT, PQFP32 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS21552LN+ | 功能描述:網(wǎng)絡控制器與處理器 IC 5V T1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21554 | 制造商:Maxim Integrated Products 功能描述: |
| DS21554G | 功能描述:IC TXRX E1 1-CHIP 5V 100-BGA RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| DS21554GN | 功能描述:IC TXRX E1 1-CHIP 5V 100-BGA RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| DS21554L | 功能描述:網(wǎng)絡控制器與處理器 IC 3.3/5V E1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復。