【选型】国产TVS阵列SR05-4B用于无线振动传感器SIM卡端口ESD防护设计，最大容值仅0.8pF

时间： 2021-08-29 来源：世强

技术问答

无线振动传感器一般用SIM卡存储监测机泵的三轴振动及温度信息，为避免无线振动传感器SIM卡端口因热插拔或人体接触产生静电ESD导致SIM卡相关敏感电子器件无法正常工作，一般需要对SIM卡端口做静电防护设计，选型因素参考如下：

1、小体积：推荐选择集成TVS阵列，可同时对VCC、RST、CLK、VPP、IO等信号做防护；

2、高抗ESD：符合IEC 61000-4-2（ESD），4级（±15kV空气，±8kV接触放电）；

针对如上设计需求，推荐硕凯电子TVS阵列SR05-4B，最大结电容仅0.8pF，采用SOT-26封装，可同时对SIM端口VCC、RST、CLK、VPP、IO等信号做ESD防护，最大反向工作电压5V，接触放电能力达±8kV，空气放电能力±15kV，工作温度范围-55~150℃，用于SIM卡端口防护电路示意图参考如下图1所示。

图1：硕凯电子TVS阵列SR05-4B用于SIM卡端口防护电路示意图

推荐硕凯电子TVS阵列SR05-4B理由如下：

1、最大结电容低至0.8pF，避免高速数据传输出现数据丢包或传输数据错误；

2、采用SOT-26小尺寸封装，典型封装尺寸2.8x2.9mm，有助于小型化设计；

3、市面上有成熟的应用，产品性能得到验证，可靠性高；

4、世强平台常备库存，具有良好的供货交期，可以快速支持样品和量产服务。

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选型指南 - 硕凯电子 - Ver Feb.2019 - Feb.2019 PDF 中文下载

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CAD模型库 - 硕凯电子 - 2024/10/29 RAR 英文下载

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数据手册 - 硕凯电子 - Revision October 18, 2018 - October 18, 2018 PDF 英文下载

硕凯电子（Socay）SR05-4B用于ESD保护的瞬态电压抑制器阵列数据手册

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数据手册 - 硕凯电子 - Revision October 25,2019 - 2019年10月25日 PDF 英文下载

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型号- SE05T6D14GA

数据手册 - 硕凯电子 - Revision May 23, 2023 - May 23, 2023 PDF 英文下载

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应用方案发布时间 : 2019-03-19

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选型指南 - 硕凯电子 - 2019/3/14 PDF 英文下载