Other Parts Discussed in Thread: TXB0108 用TXB0108用于转换A/B端电压,VCCA供1.5V,VCCB供5V,OE短到VCCA。
当我在A1灌1.5V,B1能够正常输出5V!
但是为什么我只在A1灌电压,其他A端口会有1.3V左右的电压呢?是不是在硬件处理上有需要注意的地方?
Other Parts Discussed in Thread: TXB0108 the datasheet of TXB0108 say that:The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at VCCI or both at GND.is it necessary?i think the unused IO pairs can be floating.but i…
Other Parts Discussed in Thread: TXB0108 请问TXB0108的datasheet上说没有用到的IO要接GND或电源,如下:The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at VCCI or both at GND.请问这个有必要吗?我觉得没有用到的悬空就行了,为什么还要接成固定电平?
Other Parts Discussed in Thread: TXB0108 原理图如下:
从A侧输入的信号如下:
放大后如下:
在B侧输出的信号如下:
放大后如下:
A侧的输入信号电平是3.3V,正常情况下,B侧输出应该是电平为5V,现在输出在2V上下小幅震荡,请问是哪里出了问题?(未用到的通道引脚都接地了)