参数资料
| 型号： | SRDA05-4R2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | TVS ARRAY LO CAP 500W 8SOIC |
| 产品变化通告： | Product Discontinuation 27/Jun/2007 |
| 标准包装： | 2,500 |
| 电压 - 反向隔离（标准值）： | 5V |
| 电压 - 击穿： | 6V |
| 功率（瓦特）： | 500W |
| 电极标记： | 4 通道阵列 - 单向 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
| 其它名称： | SRDA05-4R2OS |
SRDA05-4R2
APPLICATIONS INFORMATION
The SRDA05-4R2 is a low capacitance TVS diode array
designed to protect sensitive electronics such as
communications systems, computers, and computer
peripherals against damage due to ESD events or transient
overvoltage conditions. Because of its low capacitance, it
can be used in high speed I/O data lines. The integrated
design of the SRDA05-4R2 offers surge rated, low
Option 2
Protection of four data lines with bias and power supply
isolation resistor.
I/O 1
I/O 2
V CC
capacitance steering diodes and a TVS diode integrated in a
1
8
single package (SO-8). If a transient condition occurs, the
steering diodes will drive the transient to the positive rail of
the power supply or to ground. The TVS device protects the
power line against overvoltage conditions avoiding damage
to the power supply and other downstream components.
10 K
2
3
4
7
6
5
I/O 3
SRDA05-4R2 Configuration Options
The SRDA05-4R2 is able to protect up to four data lines
against transient overvoltage conditions by driving them to
a fixed reference point for clamping purposes. The steering
diodes will be forward biased whenever the voltage on the
protected line exceeds the reference voltage (Vf or Vcc+Vf).
The diodes will force the transient current to bypass the
sensitive circuit.
Data lines are connected at pins 1, 4, 6 and 7. The negative
reference is connected at pins 5 and 8. These pins must be
connected directly to ground using a ground plane to
minimize the PCB's ground inductance. It is very important
to reduce the PCB trace lengths as much as possible to
minimize parasitic inductances.
I/O 4
Figure 6.
The SRDA05-4R2 can be isolated from the power supply
by connecting a series resistor between pins 2 and 3 and Vcc.
A 10 k W resistor is recommended for this application. This
will maintain a bias on the internal TVS and steering diodes,
reducing their capacitance.
Option 3
Protection of four data lines using the internal TVS diode
as reference.
I/O 1
I/O 2
Option 1
Protection of four data lines and the power supply using
Vcc as reference.
NC
1
2
8
7
I/O 1
I/O 2
1
2
8
7
I/O 3
I/O 4
NC
3
4
6
5
V CC
3
4
6
5
Figure 7.
In applications lacking a positive supply reference or
I/O 3
I/O 4
Figure 5.
For this configuration, connect pins 2 and 3 directly to the
those cases in which a fully isolated power supply is
required, the internal TVS can be used as the reference. For
these applications, pins 2 and 3 are not connected. In this
configuration, the steering diodes will conduct whenever the
voltage on the protected line exceeds the working voltage of
the TVS plus one diode drop (Vc=Vf + V TVS ).
positive supply rail (Vcc). The data lines are referenced to
the supply voltage. The internal TVS diode prevents
overvoltage on the supply rail. Biasing of the steering diodes
reduces their capacitance.
http://onsemi.com
4
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相关代理商/技术参数 |
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| SRDA05-4R2/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Low Capacitance Surface Mount TVS for High-Speed Data Interfaces |
| SRDA05-4R2G | 功能描述:TVS二极管阵列 LO CAPACITANCE SURF MNT TVS RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C |
| SRDA05-4T | 制造商:Semtech Corporation 功能描述:ESD Suppressor Diode Arrays 制造商:Semtech Corporation 功能描述:TVS Diode |
| SRDA05-4TB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:RailClamp Low Capacitance TVS Diode Array |
| SRDA054TBT | 制造商:Semtech Corporation 功能描述: |
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