​​​​​​​Precautions for application of Computer fan speed signal (FG)?

1. The voltage connected to the Pull-up resistor of the Computer fan shall not exceed the Vce max value of the internal triode.
2. The value of Pull-up resistor of Computer fan is limited to Ic current within 10mA.
3. The high level of the alarm signal of the Computer fan is related to the pull-up voltage, and it should not exceed the MCU I/O limit.
4. The square wave signal detected by the Computer fan needs to be calculated to get the current speed, and the calculation method can be found in the product specification.