Features
1) The built-in bias resistors consist of thin-film resistors with
   complete isolation to allow positive biasing of the input, and
   parasitic effects are almost completely eliminated.
2) Only the on / off conditions need to be set for operation,
   making the device design easy.
3) Higher mounting densities can be achieved.

Structure
   PNP epitaxial planar silicon transistor
   (Resistor built-in type)