收藏本站
AOZ8818
High Speed PCB Layout Guidelines
Printed circuit board layout is the key to achieving the
highest level of surge immunity on power and data lines.
The location of the protection devices on the PCB is the
simplest and most important design rule to follow. The
AOZ8808DI devices should be located as close as
possible to the noise source. The AOZ8808DI device
should be placed on all data and power lines that enter or
exit the PCB at the I/O connector. In most systems, surge
pulses occur on data and power lines that enter the PCB
through the I/O connector. Placing the AOZ8808DI
devices as close as possible to the noise source ensures
that a surge voltage will be clamped before the pulse can
be coupled into adjacent PCB traces. In addition, the
PCB should use the shortest possible traces. A short
trace length equates to low impedance, which ensures
that the surge energy will be dissipated by the
AOZ8808DI device. Long signal traces will act as
antennas to receive energy from fields that are produced
by the ESD pulse. By keeping line lengths as short as
possible, the efficiency of the line to act as an antenna for
ESD related fields is reduced. Minimize interconnecting
line lengths by placing devices with the most interconnect
as close together as possible. The protection circuits
should shunt the surge voltage to either the reference or
chassis ground. Shunting the surge voltage directly to the
IC’s signal ground can cause ground bounce. The
clamping performance of TVS diodes on a single ground
PCB can be improved by minimizing the impedance with
relatively short and wide ground traces. The PCB layout
and IC package parasitic inductances can cause
significant overshoot to the TVS’s clamping voltage. The
inductance of the PCB can be reduced by using short
trace lengths and multiple layers with separate ground
and power planes. One effective method to minimize
loop problems is to incorporate a ground plane in the
PCB design.
The AOZ8808DI ultra-low capacitance TVS is designed
to protect four high speed data transmission lines from
transient over-voltages by clamping them to a fixed
reference. The low inductance and construction
minimizes voltage overshoot during high current surges.
When the voltage on the protected line exceeds the
reference voltage the internal steering diodes are forward
biased, conducting the transient current away from the
sensitive circuitry. The AOZ8808DI is designed for ease
of PCB layout by allowing the traces to run underneath
the device. The pinout of the AOZ8808DI is designed to
simply drop onto the IO lines of a High Definition
Multimedia Interface (HDMI) or USB 3.0 design without
having to divert the signal lines that may add more
parasitic inductance. Pins 1, 2, 4 and 5 are connected to
the internal TVS devices and pins 6, 7, 9 and 10 are no
connects. The no connects was done so the package can
be securely soldered onto the PCB surface.
Clock
Data0
Ground
Data1
Data2
Clock
Data0
Ground
Data1
Data2
SSRX+
SSRX–
Ground
SSTX+
SSTX–
SSRX+
SSRX–
Ground
SSTX+
SSTX–
Figure 3. Flow Through Layout for HDMI
Figure 4. Flow Through Layout for USB 3.0
Rev. 1.0 November 2011
www.aosmd.com
Page 5 of 8
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
APA1FGRA04 SWITCH PUSH SPDT 0.05A 48V
APBE1FGRA04 SWITCH PUSH SPDT 0.05A 48V
APLVD400 VOLTMETER AC 3 1/2-DIGIT
APMR0016 MOD APMR 3-PH VAULT DET DIN RAIL
APS INT2012 INVERTER 2000W 230VAC OUT
APS1012 INVERTR 1000W 12VDC 2OUT W/CHRGR
APS1250 INVERTER W/BATT CHARGE 1250W
APS1524 INVERTER 1500W HARDWIRE OUTPUT
相关代理商/技术参数
AOZ8818DI-05 功能描述:TVS DIODE ARRAY LOW CAP 10DFN RoHS:是 类别:过电压，电流，温度装置 >> TVS - 二极管 系列:- 标准包装:2,000 系列:TransZorb® 电压 - 反向隔离（标准值）:8V 电压 - 击穿:8.89V 功率（瓦特）:500W 电极标记:单向 安装类型:通孔 封装/外壳:DO-204AC，DO-15，轴向 供应商设备封装:DO-204AC（DO-15） 包装:带盒（TB）
AOZ8819DI-05 功能描述:TVS DIODE 3.6V 4CH ULTRA LOW CAP 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:齐纳 单向通道:4 电压 - 反向关态（典型值）:5V（最大） 电压 - 击穿（最小值）:6V 电压 - 箝位（最大值）@ Ipp:9V 电流 - 峰值脉冲（10/1000μs）:12A 功率 - 峰值脉冲:- 电源线路保护:是 应用:通用 不同频率时的电容:0.6pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:3-UFDFN 供应商器件封装:3-DFN（1.0 x 0.60） 标准包装:3,000
AOZ8821DT-03 功能描述:TVS DIODE 3.6V 6CH ULTRA LOW CAP 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:齐纳 单向通道:1 电压 - 反向关态（典型值）:3.6V（最大） 电压 - 击穿（最小值）:4V 电压 - 箝位（最大值）@ Ipp:7V 电流 - 峰值脉冲（10/1000μs）:6A（8/20μs） 功率 - 峰值脉冲:40W 电源线路保护:无 应用:通用 不同频率时的电容:0.5pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:2-XDFN 供应商器件封装:2-DFN（1x0.6） 标准包装:10,000
AOZ8822DI-05 功能描述:TVS DIODE 2CH LOW CAP DFN 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:齐纳 单向通道:2 电压 - 反向关态（典型值）:5V（最大） 电压 - 击穿（最小值）:- 电压 - 箝位（最大值）@ Ipp:17V 电流 - 峰值脉冲（10/1000μs）:15A 功率 - 峰值脉冲:- 电源线路保护:无 应用:通用 不同频率时的电容:0.55pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:3-UFDFN 供应商器件封装:3-DFN（1.0 x 0.60） 标准包装:10,000
AOZ8829DI-03 功能描述:TVS DIODE 4CH LOW CAP DFN 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:齐纳 单向通道:4 电压 - 反向关态（典型值）:3.3V（最大） 电压 - 击穿（最小值）:- 电压 - 箝位（最大值）@ Ipp:3V 电流 - 峰值脉冲（10/1000μs）:5A 功率 - 峰值脉冲:- 电源线路保护:无 应用:通用 不同频率时的电容:0.6pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:3-UFDFN 供应商器件封装:3-DFN（1.0 x 0.60） 标准包装:3,000
AOZ8831 制造商:AOSMD 制造商全称:Alpha & Omega Semiconductors 功能描述:Ultra Low Capacitance One-line Bi-directional TVS Diode
AOZ8831ADI-05 功能描述:TVS DIODE 5VWM 19.5VC 制造商:alpha & omega semiconductor inc. 系列:- 包装:带卷（TR） 零件状态:有效 类型:齐纳 单向通道:- 双向通道:1 电压 - 反向关态（典型值）:5V（最大） 电压 - 击穿（最小值）:6V 电压 - 箝位（最大值）@ Ipp:19.5V 电流 - 峰值脉冲（10/1000μs）:2.5A（8/20μs） 功率 - 峰值脉冲:40W 电源线路保护:无 应用:通用 不同频率时的电容:0.3pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:2-UDFN 供应商器件封装:2-DFN（1x0.6） 标准包装:10,000
AOZ8831DI-05 功能描述:TVS DIODE LOW CAP 1-LINE DFN RoHS:是 类别:过电压，电流，温度装置 >> TVS - 二极管 系列:- 标准包装:2,000 系列:TransZorb® 电压 - 反向隔离（标准值）:8V 电压 - 击穿:8.89V 功率（瓦特）:500W 电极标记:单向 安装类型:通孔 封装/外壳:DO-204AC，DO-15，轴向 供应商设备封装:DO-204AC（DO-15） 包装:带盒（TB）