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SRV05-4  (ESD静电保护二极管SRV05-4,封装形式:SOT-26)
.型号:   SRV05-4
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ESD静电保护二极管SRV05-4,封装形式:SOT-26
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用于ESD保护的瞬态电压抑制器阵列
SRV05-4
Applications Information (Continue)
Figure 4.Video Interface Protection
视频接口保护
低电容
视频接口很容易受到瞬态电压
resulting from electrostatic discharge (ESD) and
“热
plugging” cables. If left unprotected, the video interface
IC may be damaged or even destroyed. Protecting a
high-speed video port presents some unique challenges.
SRV05-4
First, any added protection device must have extremely
low capacitance and low leakage current so that the
integrity of the video signal is not compromised. Second,
the protection component must be able to absorb high
voltage transients without damage or degradation.
作为
minimum, the device should be rated to handle ESD
voltages per IEC61000-4-2, level 4 (±15kV air,
±8kV
contact). The clamping voltage of the device (when
SRV05-4
conducting high current ESD pulses) must be sufficiently
low enough to protect the sensitive CMOS IC. If the
clamping voltage is too high, the
“protected”
设备可以
latch-up or be destroyed. Finally, the device must take up
a relatively small amount of board space, particularly in
portable applications such as notebooks and handhelds.
The SRV05-4 is designed to meet or exceed all of the
above criteria. A typical video interface protection circuit
SRV05-4
图5 - 双USB端口保护
is shown in Figure 4. All exposed lines are protected
including R, G, B, H-Sync, V-Sync, and the ID lines for
plug and play monitors.
通用串行总线ESD保护
The SRV05-4 may also be used to protect the USB ports
on monitors, computers, peripherals or portable systems.
Each device will protect up to two USB ports (Figure5).
图6 - SIM卡端口
当数据线上的电压超过所述总线
电压(加上一个二极管压降) ,内部整流器
正向偏置导通瞬态电流远
from the protected controller chip. The TVS diode directs
the surge to ground. The TVS diode also acts to
suppress ESD strikes directly on the voltage bus.
SRV05-4
因此,电源和数据引脚被保护的一
单个装置。
联合国半导体有限公司
Revision January 06, 2014
5/7
@ UN Semiconductor Co., Ltd. 2014
特定网络阳离子如有更改,恕不另行通知。
请参考www.unsemi.com.tw的最新信息。
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