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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1400518/faq-tcal9539-q1-what-i2c-io-expanders-support-q1-grade
常见问题解答：逻辑和电压转换 > IXC >> 哪些 I2C IO 扩展器支持汽车1级？
到目前为止共有3个。
TCAL9539-Q1- 16位、1.08V 至3.6V I2C IO 扩展器、单电源、中断、复位、敏捷 I/O 配置
TCA6408A-Q1 - 8位1.65V 至3.6V I2C IO 扩展器、双电源、中断、复位和配置寄存器
TCA9539-Q1 - 16位1.65V 至3.6V I2C IO 扩展器、单电源、中断、复位和配置寄存器
