Hello team,
I have some questions about MAX3232E-Q1, that I don't find an answer from d/s and e2e.
1. Charge pump
- .Why we need two charger pump (positive and negative) integrated into Max3232-Q1?
- What does V+ and V- stand for? What are the typical value of V+ and V- if Vcc=3.3V?
2. Unused pin
- For unused receiver port, we can leave input and output open. While for unused driver port, the input pin must have a logic high or low applied, and the output pin could be left open. Is that correct?
- Do we need to add pull-up or pull-down resistor in receiver/driver output pin?
Thanks.
Dongbao