- 您现在的位置：买卖IC网 > Sheet目录203 > AOZ8304ADI (Alpha & Omega Semiconductor Inc)TVS DIODE ARRAY LOW CAP 10DFN
AOZ8304A
Application Information
The AOZ8304A TVS is design to protect four data lines
from fast damaging transient over-voltage by clamping
the over-voltage to a reference. When the transient on a
protected data line exceeds the reference voltage, the
steering diode is forward bias and conducts harmful ESD
transients away from the sensitive circuitry under
protection.
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
AOZ8304A devices should be located as close as
possible to the noise source. The placement of the
AOZ8304A devices should be used 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 AOZ8304A 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 AOZ8304A 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
TPBIASx
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 AOZ8304A 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.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
1. Place the TVS near the I/O terminals or connectors
to restrict transient coupling.
2. Fill unused portions of the PCB with ground plane.
3. Minimize the path length between the TVS and the
protected line.
4. Minimize all conductive loops including power and
ground loops.
5. The ESD transient return path to ground should be
kept as short as possible.
6. Never run critical signals near board edges.
7. Use ground planes whenever possible.
8. Avoid running critical signal traces (clocks, resets,
etc.) near PCB edges.
9. Separate chassis ground traces from components
and signal traces by at least 4 mm.
10. Keep the chassis ground trace length-to-width ratio
< 5:1 to minimize inductance.
11. Protect all external connections with TVS diodes.
TPAx+
IEEE 1394
TPAx-
PHY
TPBx+
TPBx-
GND
1μF
56Ω
56Ω
56Ω
56Ω
IEEE 1394
Connector
5.1kΩ
270pF
AOZ8304A
IEEE1394 Port Connection
Rev. 1.1 August 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。
相关PDF资料
AOZ8808DI-03
TVS DIODE ARRAY LOW CAP 10DFN
AOZ8808DI-05
TVS DIODE ARRAY LOW CAP 10DFN
AOZ8818DI-03
TVS DIODE ARRAY LOW CAP 10DFN
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
相关代理商/技术参数
AOZ8304ADI-02
功能描述:TVS DIODE 3.3VWM 10VC 10DFN 制造商:alpha & omega semiconductor inc. 系列:- 包装:- 零件状态:上次购买时间 类型:转向装置（轨至轨） 单向通道:4 双向通道:- 电压 - 反向关态（典型值）:3.3V（最大） 电压 - 击穿（最小值）:3.5V 电压 - 箝位（最大值）@ Ipp:10V 电流 - 峰值脉冲（10/1000μs）:25A（8/20μs） 功率 - 峰值脉冲:350W 电源线路保护:是 应用:以太网，电信 不同频率时的电容:5pF @ 1MHz 工作温度:-40°C ~ 85°C（TJ） 安装类型:- 封装/外壳:- 供应商器件封装:- 标准包装:3,000
AOZ8304DIL
功能描述:TVS DIODE 3.3VWM 10VC 10DFN 制造商:alpha & omega semiconductor inc. 系列:- 包装:带卷（TR） 零件状态:上次购买时间 类型:转向装置（轨至轨） 单向通道:4 双向通道:- 电压 - 反向关态（典型值）:3.3V（最大） 电压 - 击穿（最小值）:3.5V 电压 - 箝位（最大值）@ Ipp:10V 电流 - 峰值脉冲（10/1000μs）:25A（8/20μs） 功率 - 峰值脉冲:350W 电源线路保护:是 应用:以太网，电信 不同频率时的电容:5pF @ 1MHz 工作温度:-40°C ~ 85°C（TJ） 安装类型:表面贴装 封装/外壳:10-UFDFN 裸露焊盘 供应商器件封装:10-DFN（2.6x2.6） 标准包装:3,000
AOZ8305DIL
制造商:AOS 功能描述:TVS
AOZ8308SO-02
功能描述:TVS DIODE 4CH HIGH SURGE SO-8 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）:2.3V (最大) 电压 - 击穿（最小值）:2.8V 电压 - 箝位（最大值）@ Ipp:15V 电流 - 峰值脉冲（10/1000μs）:25A（8/20μs） 功率 - 峰值脉冲:450W 电源线路保护:无 应用:通用 不同频率时的电容:1.5pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商器件封装:8-SOIC 标准包装:3,000
AOZ8311DI-26
功能描述:TVS DIODE 26VWM 46VC DFN 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:1 双向通道:- 电压 - 反向关态（典型值）:26V（最大） 电压 - 击穿（最小值）:28.6V 电压 - 箝位（最大值）@ Ipp:46V 电流 - 峰值脉冲（10/1000μs）:9A（8/20μs） 功率 - 峰值脉冲:410W 电源线路保护:无 应用:通用 不同频率时的电容:90pF @ 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 （1.6x0.8） 标准包装:3,000
AOZ8312DI
功能描述:TVS DIODE 2.5VWM 9VC DFN 制造商:alpha & omega semiconductor inc. 系列:- 包装:带卷（TR） 零件状态:有效 类型:转向装置（轨至轨） 单向通道:- 双向通道:5 电压 - 反向关态（典型值）:2.5V（最大） 电压 - 击穿（最小值）:2.8V 电压 - 箝位（最大值）@ Ipp:9V 电流 - 峰值脉冲（10/1000μs）:18A（8/20μs） 功率 - 峰值脉冲:160W 电源线路保护:是 应用:通用 不同频率时的电容:2.3pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:12-UFDFN 裸露焊盘 供应商器件封装:12-DFN-EP（3.5x2.5） 标准包装:3,000
AOZ8318DI
功能描述:TVS DIODE 2.5VWM 5VC 10DFN 制造商:alpha & omega semiconductor inc. 系列:- 包装:剪切带（CT） 零件状态:有效 类型:转向装置（轨至轨） 单向通道:- 双向通道:4 电压 - 反向关态（典型值）:2.5V（最大） 电压 - 击穿（最小值）:2.8V 电压 - 箝位（最大值）@ Ipp:5V 电流 - 峰值脉冲（10/1000μs）:25A（8/20μs） 功率 - 峰值脉冲:350W 电源线路保护:是 应用:以太网，电信 不同频率时的电容:3pF @ 1MHz 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:10-UFDFN 裸露焊盘 供应商器件封装:10-DFN（2.6x2.6） 标准包装:1
AOZ8328DI
功能描述:TVS DIODE 2.5VWM 16VC 10DFN 制造商:alpha & omega semiconductor inc. 系列:- 包装:带卷（TR） 零件状态:有效 类型:转向装置（轨至轨） 单向通道:- 双向通道:4 电压 - 反向关态（典型值）:2.5V（最大） 电压 - 击穿（最小值）:- 电压 - 箝位（最大值）@ Ipp:16V 电流 - 峰值脉冲（10/1000μs）:25A（8/20μs） 功率 - 峰值脉冲:450W 电源线路保护:是 应用:以太网，电信 不同频率时的电容:2.8pF @ 1MHz 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:10-UDFN 裸露焊盘 供应商器件封装:10-DFN（3x2） 标准包装:3,000