参数资料
| 型号： | DS2154LNA2+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 110/124页 |
| 文件大小： | 0K |
| 描述： | IC TXRX E1 5V 100-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 90 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | E1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-LQFP（14x14） |
| 包装： | 托盘 |
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DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
86 of 124
15.4.
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 PC board 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 15-6 shows an example circuit for the 5V device and Figure 15-7 is an example for the 3.3V
device. In both examples, fuses are used to provide protection against power-line cross. Surge protection
is provided by 470
W input resistors on the receive pair, a transient suppresser, and a diode bridge on the
transmit pair. Resistors R1 to R4 provide surge protection for the fuse. Careful selection of the
transformer allows the use of a fuse that requires no additional surge protection such as the circuit shown
in Figure 15-7. The circuit shown in Figure 15-7 is required for 3.3V operation since additional resistance
in the transmit pair cannot be tolerated. For more information on line interface design, consult the E1 Line
Interface Design Criteria and Secondary Overvoltage Protection application notes available on our
website at www.maxim-ic.com/appnoteindex.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2154L | IC TXRX E1 1CHIP 5V ENH 100-LQFP |
| DS2155LN | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2156LN+ | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2172T/T&R | IC TESTER BIT ERROR RATE 32-TQFP |
| DS2174QN+ | IC BERT ENHANCED 44-PLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2154LNA2+ | 功能描述:网络控制器与处理器 IC Enhanced E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS2154LND2 | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS2154LND2+ | 制造商:Maxim Integrated Products 功能描述:ENHANCED E1 SCT LQFP REVD2 IND LF - Rail/Tube |
| DS2155 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface |
| DS2155_06 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:T1/E1/J1 Single-Chip Transceiver |
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