MAX34334CSE 第1页-第5页 PDF中文翻译页面详情预览
用于ESD保护的瞬态电压抑制器阵列
SRV05-4
描述
The SRV05-4 is designed to protect voltage sensitive
元器件免受ESD和瞬态电压事件。优秀
钳位能力,低泄漏,以及快速的响应时间,
使这些器件非常适合于设计中的ESD保护
电路板空间非常珍贵。
低电容
SOT-26
特征
u
u
u
u
u
u
u
u
每线350瓦峰值脉冲功率( TP = 8 /20μS )
保护四个I / O线
低钳位电压
Working voltages : 5V
低漏电流
IEC61000-4-2 ( ESD )
±15kV
(空气) ​​,
±8kV
(联系)
IEC61000-4-4 ( EFT ) 40A ( 5 / 50ηs )
IEC61000-4-5 (闪电) 5A ( 8 / 20μS )
工作原理图
应用
u
u
u
u
u
u
u
u
USB 2.0电源和数据线保护
视频图形卡
显示器和佛罗里达州的显示器
Digit Video Interface (DVI)
10/100/1000以太网
笔记本电脑
SIM卡端口
ATM接口
u
u
u
u
u
u
JEDEC SOT-26 Package
模塑料可燃性等级: UL 94V- 0
Weight 16.0 Milligrams (Approximate)
数量每卷: 3,000pcs
卷带尺寸: 7英寸
无铅封装:无铅
机械特性
机械特性
符号
P
PP
T
L
T
英镑
T
J
参数
峰值脉冲功率( TP = 8 /20μS波形)
引线焊接温度
存储温度范围
工作温度范围
IEC61000-4-2 ( ESD )
空气放电
接触放电
IEC61000-4-4 ( EFT )
IEC61000-4-5 ( Lightning )
价值
350
260 ( 10秒)
-55到+150
-55到+150
±15
±8
40
5
单位
W
ºC
ºC
ºC
KV
A
A
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用于ESD保护的瞬态电压抑制器阵列
SRV05-4
电气特性
(@ 25℃ Unless Otherwise Specified )
设备
记号
V
RWM
(V)
( MAX 。 )
5.0
V
B
(V)
(分)
6.0
I
T
(MA )
V
C
@1A
( MAX 。 )
12.5
V
C
( MAX 。 )
(@A)
低电容
产品型号
I
R
(μA)
( MAX 。 )
1
C
(PF )
(典型值)。
1.2
SRV05-4
V05
1
17.5
5
特性曲线
Fig1.
8 / 20μs的脉冲波形
Fig2. ESD Pulse Waveform (according to IEC 61000-4-2)
100%
Percent of Peak Pulse Current %
90%
120
I
PP
- 峰值脉冲电流 - %我
PP
100
80
60
40
t
d
= T I
PP
/2
20
0
0
5
10
15
吨 - 时间(μs )
20
25
30
t
r
高峰值I
PP
TEST
波形
参数
t
r
=8μs
t
d
=20μs
10%
tr = 0.7~1ns
30ns
60ns
时间(纳秒)
Fig3.
功率降额曲线
110
100
90
80
70
60
50
40
30
20
10
0
0
25
50
75
100
125
150
环境温度
T
A
(ºC)
联合国半导体有限公司
Revision January 06, 2014
%额定功率
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用于ESD保护的瞬态电压抑制器阵列
SRV05-4
SOT-26 Package Outline & Dimensions
低电容
符号
分钟。
A
A1
A2
b
c
0.035
0.000
英寸
MILLIMETERS
喃。马克斯。分钟。喃。马克斯。
-
-
0.057 0.90
0.006 0.00
-
-
1.45
0.15
0.035 0.045 0.051 0.90 1.15 1.30
0.010
0.003
-
-
0.020 0.25
0.009 0.08
-
-
0.50
0.22
θ
D
E1
E
e
e1
L
L1
θ
aaa
bbb
ccc
0.110 0.114 0.122 2.80 2.90 3.10
0.060 0.063 0.069 1.50 1.60 1.75
0.110 BSC
0.037 BSC
0.075 BSC
2.80 BSC
0.95 BSC
1.90 BSC
0.012 0.018 0.024 0.30 0.45 0.60
(0.024)
-
0.004
0.008
0.008
10°
(0.60)
-
0.10
0.20
0.20
10°
焊接足迹
符号
C
G
P
X
Y
Z
英寸
(0.098)
0.055
0.037
0.024
0.043
0.141
MILLIMETERS
(2.50)
1.40
0.95
0.60
1.10
3.60
联合国半导体有限公司
Revision January 06, 2014
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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。
用于ESD保护的瞬态电压抑制器阵列
SRV05-4
应用信息
Figure 1. Data Line and Power Supply Protection
采用V
CC
作为参考
低电容
为保护设备的连接选项
Four High-Speed Data Lines
The SRV05-4 is designed to protect four data lines from
瞬时过电压由它们夹持于固定
参考。
When the voltage on the protected line
exceeds the reference voltage (plus diode VF) the
控向二极管正向偏置,在进行
transient current away from the sensitive circuitry. Data
lines are connected at pins 1, 3, 4 and 6.
reference (REF1) is connected at pin 2.
该引脚
应直接连接到接地平面上的
板以达到最佳效果。的路径长度尽可能地短
as possible to minimize parasitic inductance. The positive
reference (REF2) is connected at pin 5. The options for
连接所述正参考如下:
Figure 2. Data Line Protection with Bias and Power
Supply Isolation Resistor
1. To protect data lines and the power line, connect pin 5
directly to the positive supply rail (V
CC
).
在这
配置行被引用到的数据
电源电压。
The internal TVS diode prevents
over-voltage on the supply rail (See Figure1).
2. The SRV05-4 can be isolated from the power supply
by adding a series resistor between pin 5 and VCC.
A value of 100kΩ is recommended.
内部
TVS and steering diodes remain biased, providing the
advantage of lower capacitance (See Figure2).
3. In applications where no positive supply reference is
available, or complete supply isolation is desired, the
internal TVS may be used as the reference. In this
case, pin 5 is not connected.
The steering diodes
will begin to conduct when the voltage on the
protected line exceeds the working voltage of the TVS
(plus one diode drop) (See Figure3).
Figure 3. Data Line Protection Using Internal TVS
二极管作为参考
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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
www.unsemi.com.tw
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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