TI中文支持网Part Number:SN65HVD33
It is used in RS422 circuit. Why the resistance of B Pin and GND Pin of SN65HVD33DR is 2.2Ω， they are short circuit. But the communication is normal.
Kailyn Chen：
Hello， if the receiver is enable, output is always determined by VID. If it above VIT+ the output will be high; if it is below VIT- the output will be low.
So even though the B is short, if the Vid is still above VIT+ threshold ,it could also output high.
In addition, SN65HVD33 has integrated failsafe circuit, please refer to "9.3.4 Receiver Failsafe" section.
https://www.ti.com.cn/cn/lit/ds/symlink/sn65hvd33.pdf
