About the way to drive NVT2008PW

[Stueeee]

I encountered some issues while using NVT2008PW for voltage conversion. If the reference voltage at Side A is 1.8V, without connecting a pull-up resistor but with a parallel 0.1uF capacitor, and the reference voltage at Side B is 3.3V with a 200k pull-up resistor and a parallel 0.1uF capacitor, I would like to know if Side B can elevate a 1.8V voltage signal received from Side A to 3.3V. If it is possible, can I directly obtain a 3.3V voltage signal without serially connecting any resistors? If it is not possible, how should I configure it to convert 1.8V to 3.3V?

[Stueeee]

Thank you very much for your answer, I am deeply inspired.

So, what if I connected a pull-up resistor (200K) in series in the reaf B, as shown in the image below. At this time, if I connect the 1.8V voltage signal on side A in the figure, can I directly get the 3.3V voltage signal on side B? I mean, do I need to series some resistor at Bn to get the converted voltage signal, or can I get the converted voltage signal (3.3V) directly?

[TomasVaverka]

No need to add series resistors at Bn to get the 3.3V voltage signal on Side B.

[Stueeee]

Thank you very much for your reply! I really appreciate it !!!
We conducted tests and side B was unable to output a 3.3V voltage signal. This does not match the documents we were looking for, nor does it match your claims.
We tried to add a pull-up resistor to pull side B to 3.3V. In this way, 3.3V voltage signal can be output, but because of the pull-up resistor, the generated signal is not good at the edge.
We have two questions:
1. How does the NVT voltage conversion chip perform bidirectional voltage conversion? What I understand is that if side A is the input side and side B is the output side, then the voltage of the input signal on side A is required to be consistent with VERFA, then the output signal voltage is consistent with VERFB. And vice versa.
2. Is it really necessary to add a pull-up resistor to side B to complete the voltage conversion?

[TomasVaverka]

When using NVT2008PW for voltage conversion, if Side A is supplied with a 1.8V voltage signal and the conditions you mentioned are met (no pull-up resistor and a parallel 0.1uF capacitor), Side B can indeed elevate the voltage to 3.3V. However, to obtain a proper 3.3V voltage signal directly from Side B, it is necessary to serially connect an appropriate pull-up resistor. This ensures the correct output voltage level. Therefore, to convert 1.8V to 3.3V and obtain the output from Side B, you need to connect a suitable pull-up resistor to the output pin of Side B. Please note that when selecting the resistor value, consider the current requirements and voltage stability. You can refer to the NVT2008PW datasheet or design guidelines for specific resistor value recommendations.