DS9503

ESD保护二极管,带有电阻


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说明

This DS9503 is an ESD protection device for 1-Wire® interfaces. In contrast to the DS9502, the DS9503 includes two 5Ω isolation resistors on chip. Although 5Ω are negligible during communication, they represent a high impedance relative to the conducting diode during an ESD event. Thus, the diode absorbs the energy while the resistors further isolate and protect the circuit at the other side of the package. If used with circuits that already have a strong ESD-protection at their I/O port, the ESD protection level is raised to more than 27kV (IEC 801-2 Reference model). In case of abnormal ESD hits beyond its maximum ratings the DS9503 will eventually fail "short" thus preventing further damage.

During normal operation the DS9503 behaves like a Zener diode. When the voltage exceeds the trigger voltage, the I/V characteristic of the device will "snapback" allowing the same or higher amount of current to flow, but at a significantly lower voltage. As long as a minimum current or voltage is maintained, the device will stay in the "snapback mode." If the voltage or the current falls below the holding voltage or holding current, the device will abruptly change to its normal mode and conduct only a small leakage current.
DS9503:典型应用电路 DS9503:典型应用电路 放大+

关键特性

  • Zener characteristic with voltage snap-back to protect against ESD hits
  • High avalanche voltage, low leakage and low capacitance avoid signal attenuation
  • Compatible to all 5V logic families
  • Space-saving, low-inductance TSOC surface-mount package
  • On-chip 5 ohm resistors for isolation at both anode and cathode terminals
  • Industrial temperature range
Part NumberProtection MethodChannelsC
(pF)
Package/PinsBudgetary
Price
See Notes
DS9503 7.5V Snap-Back Zener with Two 5 Ohm Resistors1100
TSOC/6
$0.38 @1k
查看所有ESD Protection Diode Arrays (13)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

应用笔记 5724 Lightning Bolts, Defibrillators, and Protection Circuitry Save Lives
应用笔记 3377 Maxim晶片级封装安装指南

质量和环境数据

产品可靠性报告: DS9503.pdf 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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