TI中文支持网After the light-emitting command is given in the OTDR mode, the chip has no light or the lig htemitting time is short. The chip is abnormal at ambient temperature of 25 ° C, and the chip can return to normal when the ambient tempe rature is increased to 55 ~ 65 ° C. The chip is abnormal at 25 °C ~ 75 °C, and the temperature is reduced to-15 °C. The chip has failure at three temperatures.Cross-validation of de fective products to locate chip abnormalities. We did IV test on 2pcs of defective products and found that the pins of AVDD PIN8-AVSS PIN4 8 were abnormal, and then opened the cover for X-ray test and found that the defective pieces had bright spots.
liguo zhang：
OTDR模式下给发光命令后，芯片无出光或者出光小时间短暂。芯片在常温环境温度25°C下异常，将环境温度提高到55~65°C后芯片能恢复正常。我们对不良品进行交叉验证定位位芯片异常。找第三方检测中心测IV曲线及开盖，看到NG品AVDD PIN8-AVSS PIN4 8 异常，开盖后发现有亮点，不知道是芯片本身不良还是我们生产操作造成
,
Vivian Gao：
您好
感谢您对TI产品的关注！TI 论坛旨在解决客户在使用TI产品设计过程中遇到的技术问题。您的问题属于工艺和芯片质量问题范畴。建议您请按照以下方式联系客户支持部门，会有客服为您提供帮助。打开链接ticsc.service-now.com/csm点击“申请新的支持”下面的“提交申请”按钮在新打开的窗口中点击“质量，可靠性和环境信息”下面的“创建案例”按钮在打开的表格中您可以使用中文描述您的问题并且递交。会有专员为您服务。
