Friday, 1 September 2017

pic - Will a MMBT5087 saturate with a 1K resistor in the base?


I am using the configuration in picture and the MMBT5087 PNP transistor. I am not using the top base resistor, just the lower one, so there will be 5V on the base. buffer configuration to protect chip when not powered from bus voltage


My question is: Using a 1K resistor will it saturate? And is it ok to apply 5V directly on the base or it might damage the device?


I want to use 1K to keep the base current as low as possible.


Datasheet





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