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Maxim产品 - DS9503介绍

DS9503 - ESD保护二极管，带有电阻

DS9503是Maxim美信半导体公司的一款保护器产品，DS9503是ESD保护二极管，带有电阻，本站介绍了DS9503的封装应用图解、特点和优点、功能等，并给出了与DS9503相关的Maxim元器件型号供参考。

DS9503 - ESD保护二极管，带有电阻 - 保护器 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

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.

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