What does open drain mean in electronics?
open-collector output
An open-drain or open-collector output pin is driven by a single transistor, which pulls the pin to only one voltage (generally, to ground). When the output device is off, the pin is left floating (open, or hi-z).
What is a closed drain system?
A closed urinary drainage system consists of a catheter inserted into the urinary bladder and connected via tubing to a drainage bag. The catheter is retained in the bladder by an inflated balloon. Therefore, tubing and the drainage bag, to collect urine, must always be below the level of the bladder.
What is the difference between a current sink and an open drain?
Both a current source and a current sink have current flowing but in different directions. In both cases, the main point in the term open drain or collector is that part of the output transistor is directly brought out to a pin that is external to the IC package.
What happens to output pin in open drain mode?
When the configuration is done on push-pull mode,0 connects output pin to ground, 1 will connect to Vio. When an operation is done on open-drain mode, the higher transistor will be disabled, 0 continues to connect with the ground, and outputting 1 will disconnect pin to Vio and remains floating.
What does open drain mean in an integrated circuit?
If you are just starting out with electronics a term you may come across early on is “open drain”. It is very common in integrated circuits for output pins to be open drain.
What’s the difference between an open drain and an open collector?
The term “open drain” means there’s a current sink, but on a FET device, for example, a MOSFET. (A MOSFET is like a transistor that can handle higher voltages but operates in much the same way.) The term “open collector” refers to a current sink on a transistor output. If an NPN transistor is left unconnected, or open but connected