Hall effect sensor output type - open collector vs RC
You want the OC version,

It appears that "RC" simply means that it is the same as the open collector version BUT there is an internal pullup (NPN) or pulldown (PNP) resistor included inside the package.

The CYGTS101RC sensor also made by Chen Yang has RC output BUT has the decency to say in its data sheet:


Digital RC output, a pull up resistor is built 
in the sensor according to customer’s application.


and


This sensor has a RC (NPN or PNP) output voltage.  A pull-up resistor is built in the sensor. In  order to optimize the value of the pull up resistor in advance one should firstly use the sensor CYGTS101DC or CYGTS101PC for test. After optimized the pull up resistor you can use the sensor CYGTS101RC for your application.


And they are even kind enough to provide this diagram: