五月天丁香亚洲综合激情,久久一本人碰碰人碰,秋霞影院无码尤物在线观看

您現在的位置：買賣IC網 > PDF目錄11005 > DS21554LB+ (Maxim Integrated Products)IC TXRX E1 5V 100-LQFP PDF資料下載

參數資料

型號：	DS21554LB+
廠商：	Maxim Integrated Products
文件頁數：	110/124頁
文件大?。?/td>	0K
描述：	IC TXRX E1 5V 100-LQFP
產品培訓模塊：	Lead (SnPb) Finish for COTS Obsolescence Mitigation Program
標準包裝：	90
功能：	單芯片收發(fā)器
接口：	E1，HDLC，J1，T1
電路數：	1
電源電壓：	4.75 V ~ 5.25 V
電流 - 電源：	75mA
工作溫度：	0°C ~ 70°C
安裝類型：	表面貼裝
封裝/外殼：	100-LQFP
供應商設備封裝：	100-LQFP（14x14）
包裝：	托盤
包括：	遠程和 AIS 警報檢測器 / 發(fā)生器
產品目錄頁面：	1430 (CN2011-ZH PDF)

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

相關代理商/技術參數	參數描述
DS21554LB+	功能描述:網絡控制器與處理器 IC 3.3/5V E1 Transceiver RoHS:否制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 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
DS21554LBN	功能描述:網絡控制器與處理器 IC RoHS:否制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 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
DS21554LBN+	功能描述:網絡控制器與處理器 IC 3.3/5V E1 Transceiver RoHS:否制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 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
DS21554LN	功能描述:網絡控制器與處理器 IC 3.3/5V E1 Transceiver RoHS:否制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 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
DS21554LN+	功能描述:網絡控制器與處理器 IC 3.3/5V E1 Transceiver RoHS:否制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 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。

(若只采購一條型號，填寫一行即可)

*型號	*數量	廠商	批號	封裝

添加更多采購